BMW E90 Android Head Unit Elevating Your Driving Experience.

BMW E90 Android Head Unit: The very words conjure a vision of sleek dashboards and cutting-edge technology, a marriage of Bavarian engineering and the boundless world of Android. Imagine your classic E90, that beloved symbol of driving pleasure, now transformed. No longer just a car, but a portal to a world of navigation, entertainment, and connectivity, all at your fingertips.

Forget the dated factory setup; we’re talking about a complete reinvention, a symphony of digital delights orchestrated for the modern driver.

This isn’t just about replacing a radio; it’s about breathing new life into your driving experience. We’ll delve into the heart of these Android marvels, exploring their capabilities, from seamless GPS navigation and hands-free Bluetooth calling to the vast library of apps that put the world at your command. We’ll dissect compatibility, installation intricacies, performance nuances, and the very soul of these digital companions.

Prepare to unlock the full potential of your BMW E90, turning every journey into an adventure.

Table of Contents

Introduction to BMW E90 Android Head Units

The BMW E90, a hallmark of the 3 Series, graced roads from 2005 to 2013. These vehicles, known for their driving dynamics and sophisticated design, initially featured an infotainment system that, while advanced for its time, now feels somewhat dated. The original iDrive system, while functional, lacked the modern features and connectivity that drivers expect today. Upgrading to an Android head unit revitalizes this classic, transforming the driving experience.Upgrading to an Android head unit in your BMW E90 is like giving your car a technological transplant.

It breathes new life into the interior, offering a host of modern features and significantly enhancing the user experience. The benefits extend beyond mere aesthetics; you’re gaining access to a world of connectivity, entertainment, and convenience that the original system simply couldn’t provide. This upgrade represents a significant improvement in functionality, seamlessly integrating with the vehicle’s existing systems while providing a more intuitive and user-friendly interface.

Core Functionalities of Android Head Units, Bmw e90 android head unit

Android head units for the BMW E90 typically pack a suite of features designed to modernize the driving experience. These functionalities are centered around connectivity, entertainment, and navigation, offering a comprehensive upgrade over the original factory system.

GPS Navigation: Integrated GPS navigation is a cornerstone feature, eliminating the need for external devices. Most units come pre-loaded with navigation software, such as Google Maps or other popular apps, and offer real-time traffic updates. Imagine navigating through a bustling city, receiving live traffic alerts that reroute you around congestion. This feature significantly enhances the convenience and efficiency of your journeys.
Bluetooth Connectivity: Bluetooth allows for hands-free calling and audio streaming. This ensures safer driving and seamless integration with your smartphone. You can effortlessly connect your phone to make and receive calls, and stream your favorite music, podcasts, or audiobooks directly through the car’s speakers.
App Integration: The ability to download and use apps is a major advantage of Android head units. You can access a wide range of applications, including music streaming services (Spotify, Apple Music), navigation apps (Waze), and even video streaming platforms (YouTube, Netflix) (for passenger use, of course!). This transforms your car into a mobile entertainment hub.
Multimedia Playback: These units support various multimedia formats, allowing you to play music, videos, and photos from various sources, including USB drives, SD cards, and online streaming services. Enjoying your favorite media on a larger, high-resolution screen significantly enhances the in-car entertainment experience.
Vehicle Integration: Many Android head units are designed to integrate with the vehicle’s existing systems. This may include displaying information such as climate control settings, parking sensor data, and vehicle diagnostics. This seamless integration provides a cohesive and informative driving experience.

Compatibility and Vehicle Fitment

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So, you’re itching to upgrade your E90’s infotainment with an Android head unit? That’s fantastic! But before you get too excited and start tearing into your dashboard, let’s talk about making sure everythingactually* fits. Compatibility isn’t just a suggestion; it’s the difference between a seamless upgrade and a frustrating weekend. We’ll dive into the specifics to ensure your investment is a success.

Compatible BMW E90 Model Years and Trim Levels

Not every E90 is created equal when it comes to aftermarket head unit compatibility. Understanding the specific years and trims that play nicely with these units is crucial.The E90 chassis, produced from 2005 to 2013, generally presents the best fit for Android head units. However, there are nuances.

Model Years: The sweet spot for compatibility usually lies within the 2005-2012 model years. While some units may work with the very early 2005 models, double-check the specifics. The later 2013 models might present some challenges, so verify the unit’s specifications.
Trim Levels: Compatibility often extends across various trim levels, including the 325i, 328i, 330i, 335i, and their respective “xi” (all-wheel-drive) variants. Luxury, Sport, and M-Sport packages should also be compatible, although this can sometimes influence minor aesthetic details.
Important Note: Vehicles equipped with the iDrive system (BMW’s factory infotainment) can present unique challenges. While some Android head units are designed to integrate with iDrive functionality, others require bypassing it completely. Research the specific unit’s capabilities regarding iDrive integration. If you have a car with iDrive, you may need to find a unit specifically designed to work with it or consider a unit that replaces the iDrive system.

Factors Influencing Fitment

Beyond the model year and trim, several factors influence how well an Android head unit will physically and electronically integrate with your E90. Ignoring these can lead to a world of frustration.

Dashboard Design: The E90’s dashboard design is a critical element. Aftermarket head units are often designed to replace the existing factory head unit and blend seamlessly with the dashboard’s contours. However, subtle differences in dashboard design across different model years or trim levels can affect the fit. For instance, the shape of the center console and the location of air vents might vary slightly.
Wiring Harnesses: The wiring harness is the electrical lifeline of your head unit. Compatibility here is non-negotiable. Android head units come with wiring harnesses specifically designed to connect to the E90’s factory wiring. These harnesses often include connectors that plug directly into the car’s existing wiring, making installation relatively straightforward.
CAN Bus Integration: The CAN (Controller Area Network) bus is a communication network within the vehicle that allows various electronic components to exchange data. Many modern Android head units integrate with the CAN bus to retain features like steering wheel controls, parking sensor display, and climate control information.

Potential Modifications Needed for Installation

While many Android head unit installations are plug-and-play, be prepared for the possibility of minor modifications. These adjustments are usually manageable and can make the difference between a good fit and a perfect one.

Dashboard Trimming: In some cases, you might need to trim the dashboard slightly to accommodate the new head unit. This is more common with units that have larger screens. Be cautious and take your time.
Wiring Adapter Modifications: While most units come with plug-and-play harnesses, you may encounter instances where minor wiring adjustments are needed. This might involve splicing wires to connect the head unit to the car’s speakers or power supply.
Relocation of Components: Depending on the head unit’s design and your E90’s configuration, you might need to relocate some components, such as the air conditioning controls or the hazard light switch.
Antenna Adapters: The factory antenna connector may not always match the Android head unit’s antenna input. An antenna adapter is often required to ensure a proper connection.
Professional Installation: For those uncomfortable with electrical work or dashboard modifications, professional installation is always an option. A qualified installer can ensure the head unit is installed correctly and that all features function as intended. They’ll also have the tools and expertise to handle any unexpected challenges.

Features and Specifications

Upgrading your BMW E90’s infotainment system with an Android head unit unlocks a world of modern features, transforming your driving experience. These units boast a plethora of capabilities, offering everything from seamless smartphone integration to enhanced audio-visual experiences. Understanding the common features and specifications is key to selecting the perfect unit for your needs.

Screen Size, Resolution, and Touch Sensitivity

The visual interface is the primary way you interact with your new head unit, so the screen’s quality significantly impacts usability.The typical screen sizes for E90 Android head units range from 7 to 10.25 inches, offering a noticeable upgrade from the original factory displays. The resolution often varies, with options including 1024×600 pixels, 1280×720 pixels (HD), and even 1920×720 pixels (Full HD) on higher-end models.

A higher resolution translates to sharper images, clearer text, and a more enjoyable viewing experience, especially when using navigation apps or watching videos.Touch sensitivity is another critical aspect. Modern units generally employ capacitive touchscreens, similar to those found in smartphones and tablets. These screens offer a responsive and accurate touch experience, allowing for smooth navigation and effortless control of various features.

Some units may also support multi-touch gestures, such as pinch-to-zoom and swipe gestures, enhancing the overall user experience.

Operating System Versions: Android 10 vs. Android 12

The operating system is the brain of your Android head unit, dictating its functionality, performance, and user interface. Android versions evolve, bringing improvements in features, security, and performance.Android 10, a popular choice in older units, provides a stable and feature-rich experience. It includes features like:

Dark theme for reduced eye strain.
Improved privacy controls.
Gesture navigation.

Android 12, the newer iteration, offers several advantages.

Enhanced performance and speed, thanks to optimizations.
A refreshed user interface with a more modern design.
Improved security features, protecting your data.
Better support for modern apps and features.

While Android 10 units are generally more affordable, Android 12 units offer a more up-to-date and potentially longer-lasting experience. Consider your budget and the features you prioritize when choosing between these two versions. Think of it like choosing between a well-maintained classic car (Android 10) and a brand-new, cutting-edge model (Android 12). Both will get you to your destination, but the newer model often has added advantages.

Connectivity Options

Connectivity is essential for integrating your head unit with your smartphone, other devices, and the internet. Android head units offer a wide range of connectivity options to cater to various needs.The following table provides an overview of the common connectivity options available:

Feature	Description	Benefits	Example
Wi-Fi	Allows the head unit to connect to the internet via a wireless network.	Enables online navigation, music streaming, app downloads, and software updates.	Connecting to your home Wi-Fi network or a mobile hotspot.
USB	Provides a wired connection for various devices.	Allows for media playback from USB drives, charging devices, and connecting to smartphones for Android Auto or CarPlay (if supported).	Connecting a USB flash drive containing music files or plugging in your smartphone for charging and Android Auto.
Bluetooth	Enables wireless connectivity for hands-free calling and audio streaming.	Allows for making and receiving calls, streaming music from your smartphone, and connecting to other Bluetooth-enabled devices.	Pairing your smartphone to make and receive calls hands-free, or streaming music from Spotify.
AUX Input	Provides a wired connection for audio input.	Allows for connecting external audio sources, such as MP3 players or other devices, to play audio through the head unit.	Connecting an MP3 player to play music through the car’s speakers.
GPS	Built-in or external GPS antenna.	Enables navigation and location-based services.	Using Google Maps or Waze for navigation.
Radio	AM/FM radio receiver.	Allows for listening to radio stations.	Tuning into your favorite radio station.

Installation Process: Bmw E90 Android Head Unit

Embarking on the installation of an Android head unit in your BMW E90 can seem daunting, but with the right approach, it’s a manageable project that can significantly upgrade your driving experience. This section breaks down the entire process, from initial preparation to the final touches, ensuring a smooth and successful installation.

General Installation Steps

The installation process can be broken down into several key steps. Each step is crucial for a successful and fully functional installation.

Preparation and Planning: Before you even touch your car, gather all the necessary tools and the new head unit. Ensure you have the correct wiring harness adapter for your specific E90 model year and audio system (e.g., Hi-Fi, Base). Also, consult the head unit’s manual and familiarize yourself with the wiring diagrams.
Dashboard Preparation: This involves removing the existing head unit and preparing the dashboard opening for the new Android unit. This might involve removing trim panels, screws, and potentially modifying the existing mounting brackets.
Wiring Harness Connections: Connect the new head unit’s wiring harness to the BMW’s factory wiring harness using the provided adapter. This is where the color-coding and pin-out diagrams become invaluable.
Head Unit Mounting: Securely mount the Android head unit in the dashboard. This typically involves using the supplied mounting brackets or screws.
Component Connections: Connect any additional components, such as the GPS antenna, microphone, and USB cables.
Testing and Configuration: Power up the head unit and test all functions, including audio, navigation, Bluetooth, and any other features. Configure the settings to your preferences.

Wiring Harness Connections

Understanding the wiring harness connections is critical to a functional and safe installation. The following details are essential for proper connections.The wiring harness adapter is the bridge between your new Android head unit and your BMW’s original wiring. The specific color-coding can vary depending on the manufacturer of the head unit and the adapter, so it’s critical to consult the documentation provided with both.

The primary connections generally include:

Power: This connection provides the head unit with the necessary power to operate. This typically involves connecting a wire to a constant 12V power source (usually a yellow wire) and a switched 12V power source (usually a red wire). The switched wire is often connected to the ignition, so the head unit turns on and off with the car.
Ground: The ground connection completes the electrical circuit, allowing the head unit to function correctly. This is usually a black wire. Ensure a solid ground connection to the car’s chassis.
Speaker Wires: These wires transmit the audio signals to the speakers. The colors are usually paired, such as gray/gray-black for the front left speaker, white/white-black for the front right, green/green-black for the rear left, and purple/purple-black for the rear right.
CAN Bus Connection: Many modern Android head units integrate with the car’s CAN bus system. This allows the head unit to access information such as vehicle speed, door status, and climate control. This connection usually involves two wires, often labeled CAN-H and CAN-L. The exact colors vary, so refer to the wiring diagram.
Antenna Connection: This connects to the car’s existing antenna for radio reception. This may be a standard antenna connector or require an adapter.
Other Connections: Depending on the head unit’s features, you may have connections for a reverse camera, steering wheel controls, and USB ports.

It’s vital to carefully match the wires from the head unit’s harness to the corresponding wires on the adapter harness, using the color-coding as a guide. If the colors don’t match, or if you’re unsure about a particular wire, consult the pin-out diagrams for both the head unit and the adapter. Incorrect wiring can damage the head unit or the car’s electrical system.

Removing the Original Head Unit and Dashboard Preparation

Removing the original head unit and preparing the dashboard is a necessary step in the installation process. This is the physical work that makes way for the new technology.The process of removing the original head unit varies slightly depending on your E90’s specific model year and audio system, but the general steps are:

Disconnect the Battery: Before beginning any electrical work, disconnect the negative terminal of your car’s battery to prevent electrical shorts and damage.
Remove Trim Panels: Locate and carefully remove any trim panels surrounding the head unit. This often involves using a trim removal tool to avoid scratching the dashboard.
Unscrew the Head Unit: Locate and remove the screws holding the head unit in place. These screws are often located around the edges of the unit.
Disconnect the Wiring Harness: Once the screws are removed, gently pull the head unit out of the dashboard. Disconnect the wiring harness from the back of the head unit. This may involve releasing clips or tabs.
Remove the Antenna Cable: Disconnect the antenna cable from the head unit.
Prepare the Dashboard: Clean the dashboard opening, removing any dust or debris. If necessary, modify any mounting brackets or trim to accommodate the new Android head unit.

Important Note: Always work carefully and methodically. Avoid using excessive force, which can damage the dashboard or other components. If you encounter any resistance, double-check that all screws and clips have been removed. If the new head unit doesn’t fit properly, ensure the correct mounting adapter is being used.

Software and App Integration

The heart of your Android head unit’s brilliance lies in its software and the apps it supports. This is where the magic truly happens, transforming your E90’s dashboard into a command center for entertainment, navigation, and vehicle management. Let’s delve into how you can harness the full potential of your new Android brain.

Downloading and Installing Apps

The process of getting new apps onto your Android head unit is remarkably straightforward, mirroring the experience you’re likely already familiar with on your smartphone or tablet. The Google Play Store, or a similar app store depending on your head unit’s specific software, is your gateway to a vast library of applications.To download and install apps:

Access the App Store: Locate the app store icon on your head unit’s home screen. It typically features the Google Play Store logo or a similar symbol.
Search for Apps: Use the search bar to find the apps you want. Type in the app’s name, such as “Spotify,” “Google Maps,” or “YouTube.”
Select and Install: Tap on the app icon in the search results. You’ll see a description of the app and a button labeled “Install.” Tap this button.
Grant Permissions: The system will ask for permissions, explaining what the app needs to access (e.g., location, storage). Review these carefully and tap “Accept” if you’re comfortable with the permissions.
App Installation: The app will download and install automatically. Once complete, you’ll see an “Open” button.
Open and Enjoy: Tap “Open” to launch the app and begin using it. You may need to sign in with your account for certain apps.

Popular Apps for Car Use

Choosing the right apps can significantly enhance your driving experience. Several categories of apps are particularly useful in a car environment, catering to navigation, entertainment, and communication needs.

Here’s a breakdown of some popular app categories and examples:

Navigation: These apps provide turn-by-turn directions, real-time traffic updates, and points of interest.
- Google Maps: Offers global navigation, traffic data, and offline maps. It’s a robust and reliable choice for most drivers.
- Waze: A community-based navigation app known for real-time traffic alerts, hazard warnings, and police presence reports.
- Here WeGo: Provides offline maps and navigation, ideal for areas with unreliable internet connectivity.
Music Streaming: Stream your favorite music and podcasts directly through your head unit.
- Spotify: Offers a vast library of music, podcasts, and personalized playlists.
- Apple Music: A subscription-based streaming service with a massive catalog and curated content.
- YouTube Music: Integrates music videos and audio, offering a diverse listening experience.
- Pandora: A radio-style streaming service that creates personalized stations based on your musical preferences.
Video Playback: Watch videos and movies while parked.
- YouTube: Provides access to a massive library of videos, including music, tutorials, and entertainment content.
- Netflix: Stream movies and TV shows (requires a subscription).
- Hulu: Another popular streaming service offering a wide range of movies and TV shows (requires a subscription).
Communication: Stay connected with hands-free calling and messaging.
- Bluetooth Phone Integration: Most head units seamlessly integrate with your phone’s Bluetooth, allowing you to make and receive calls.
- Messaging Apps (e.g., WhatsApp, Telegram): Some apps offer voice calling or text-to-speech functionality. However, using these apps while driving is strongly discouraged.

Integration with Vehicle Systems

A key advantage of a well-integrated Android head unit is its ability to interact with your BMW E90’s existing systems, such as steering wheel controls and parking sensors. This integration enhances usability and safety, allowing you to control various functions without taking your hands off the wheel or your eyes off the road.

Here’s how these integrations typically work:

Steering Wheel Controls: The head unit is designed to interface with your car’s steering wheel controls, allowing you to adjust the volume, change tracks, answer or reject calls, and access other functions directly from the steering wheel. This is achieved by connecting specific wires during the installation process and configuring the head unit’s software to recognize the signals from the steering wheel buttons.
Parking Sensors: Many Android head units support the display of parking sensor data. This typically involves connecting the head unit to your car’s existing parking sensor system. When you engage reverse gear, the head unit will display visual representations of the distance to obstacles, often accompanied by audible alerts. This integration can significantly improve parking safety and convenience.

The level of integration can vary depending on the specific head unit model and the features supported by your E90. Make sure to consult the head unit’s specifications and installation instructions to ensure compatibility and proper setup.

Hardware Considerations

Choosing the right Android head unit for your BMW E90 involves understanding the internal workings that power the experience. The hardware components directly impact the speed, responsiveness, and visual quality of the system. Let’s delve into the crucial elements that determine the performance of your in-car entertainment.

Processor Types and Performance Impact

The processor, often referred to as the Central Processing Unit (CPU), is the brain of the head unit, responsible for executing instructions and managing all operations. Different processor types offer varying levels of performance, which directly affects how smoothly the system runs.

ARM Architecture: Most Android head units for the E90 utilize processors based on the ARM architecture. ARM processors are known for their efficiency and balance between performance and power consumption. Within the ARM family, several processor cores are commonly found.
Single-Core Processors: These older processors offer basic functionality, but can struggle with multitasking and demanding applications. Their performance is generally slower, and lag is noticeable when switching between apps or running navigation alongside music.
Dual-Core Processors: Offering a step up, dual-core processors handle multiple tasks more efficiently than single-core units. They provide a smoother user experience for everyday tasks, but might still show some limitations with resource-intensive apps.
Quad-Core Processors: These processors are a significant improvement, providing a much more responsive experience. They can handle multitasking with ease, including running navigation, streaming music, and using other apps simultaneously without noticeable lag.
Octa-Core Processors: The top-tier processors offer the best performance, providing lightning-fast responsiveness and the ability to run even the most demanding applications without any hiccups. They ensure a fluid and enjoyable user experience.

Consider a scenario: you are driving and using GPS navigation, streaming music via Spotify, and also have Bluetooth connected for phone calls. A single-core processor would likely stutter and lag, causing frustration. A quad-core or octa-core processor, however, would handle all these tasks seamlessly, providing a smooth and enjoyable driving experience.

RAM and Storage Capacity

Random Access Memory (RAM) and storage capacity are critical components that determine how well your Android head unit functions. RAM is used for temporary data storage, while storage holds the operating system, apps, and media files.

RAM (Random Access Memory):

2GB RAM: Adequate for basic tasks, but can struggle with multitasking and running multiple apps simultaneously. You might experience lag or slowdowns when switching between apps or using demanding features.
4GB RAM: Provides a much smoother experience, allowing for more multitasking and better performance with demanding apps. This is a good baseline for most users.
6GB or 8GB RAM: Offers the best performance, ensuring a fluid and responsive experience even when running multiple apps, games, or high-resolution videos.

Storage Capacity:

16GB Storage: Suitable for basic use, but can quickly fill up with apps, music, and other media files. You might need to regularly delete files to free up space.
32GB Storage: Offers more space for apps and media, providing a more comfortable experience without needing to constantly manage storage.
64GB or 128GB Storage: Provides ample storage for a large library of music, videos, and apps, ensuring you won’t run out of space anytime soon.

Imagine you have a large music library and want to download several navigation apps. A head unit with 16GB of storage would quickly become full, forcing you to delete files or rely on streaming. A unit with 64GB or 128GB, however, would easily accommodate your entire library and allow you to download all the apps you need without any concerns about storage limitations.

Screen Technologies and Visual Quality

The display is your primary interface with the Android head unit, and the screen technology used significantly impacts the visual experience.

LCD (Liquid Crystal Display): This is the most common and cost-effective display technology. LCD screens provide good brightness and color reproduction, but they can sometimes suffer from limited viewing angles, meaning the image may appear distorted when viewed from certain angles.
IPS (In-Plane Switching): IPS displays offer significantly improved viewing angles compared to standard LCDs, meaning the image remains clear and vibrant even when viewed from the side. They also generally provide better color accuracy and contrast.
OLED (Organic Light-Emitting Diode): OLED displays offer the best visual quality, with superior contrast, deeper blacks, and wider viewing angles. They also tend to be more energy-efficient. OLED screens are typically found in higher-end head units.

Consider watching a movie while driving. An IPS display would provide a much better viewing experience for passengers in the back seats compared to a standard LCD. An OLED display would take the experience even further, offering incredibly vibrant colors and deep blacks, making the movie feel more immersive.

Audio Quality and Integration

Upgrading your BMW E90’s head unit to an Android system promises a significant leap in functionality, but it’s crucial to understand how it impacts your car’s audio experience. The transition involves more than just plugging in a new device; it requires careful consideration of audio quality, integration with existing components, and optimizing settings for the best possible sound. This section delves into these critical aspects, ensuring you can fully enjoy your music, podcasts, and audiobooks.

Impact on Audio Quality

The Android head unit itself serves as the source of your audio, and its quality plays a vital role in the overall sound. It processes digital audio files, converts them to analog signals, and outputs them to your car’s audio system. The quality of this processing and the output signal significantly affect the final sound you hear.

Pre-amp Outputs: Many Android head units feature pre-amp outputs (often labeled as RCA outputs). These outputs provide a low-level, amplified signal that you can connect to external amplifiers. This is a critical feature for anyone planning to upgrade their audio system, allowing for the use of more powerful amplifiers and improved sound quality.
Equalizer Settings: Android head units typically come equipped with built-in equalizers. These allow you to adjust the audio frequencies, tailoring the sound to your preferences and compensating for the acoustic characteristics of your car’s interior. A good equalizer offers a range of frequency bands, allowing for precise adjustments to the bass, mid-range, and treble.
Digital Signal Processing (DSP): Some higher-end Android head units incorporate DSP. This advanced technology allows for even finer control over the audio signal, enabling features like time alignment (to create a more accurate soundstage), crossover settings (to control the frequencies sent to different speakers), and advanced equalization.

Connecting to Existing Car Audio Systems

Integrating the Android head unit with your existing audio system requires a strategic approach. Whether you have the basic factory setup or a more advanced system with amplifiers and upgraded speakers, the connection process will vary.

Here’s how to navigate the connection process:

Factory Systems: For cars with the standard factory audio system, the Android head unit will usually connect directly to the existing speaker wiring. This is typically a straightforward process, involving plugging in the appropriate harnesses. However, you might need to use an adapter harness to ensure compatibility.
Amplified Systems: If your E90 has a factory amplifier, you’ll need to determine how the head unit’s outputs connect to it. This often involves using the pre-amp outputs (RCA) on the Android head unit and connecting them to the amplifier’s inputs. You might need to use an adapter to ensure the correct signal level and compatibility. For example, the Hi-Fi (S676A) and the Top Hi-Fi (S677A) audio systems in the E90 have different wiring configurations and amplifier locations, so the connection process varies.
Aftermarket Amplifiers and Speakers: If you have an aftermarket amplifier and speakers, the process is similar to connecting to a factory amplified system. You’ll use the pre-amp outputs to connect to your amplifier, ensuring that the amplifier’s input sensitivity matches the head unit’s output voltage. The amplifier will then power your aftermarket speakers.
Wiring Harnesses and Adapters: Using the correct wiring harnesses and adapters is essential for a clean and reliable installation. These adapters ensure that the Android head unit’s wiring matches your car’s existing wiring, preventing damage and simplifying the connection process.

Audio Output Options and Their Influence on the Listening Experience

The way you choose to output audio from the Android head unit has a significant impact on the listening experience. Understanding the options and their effects will allow you to tailor your system for the best possible sound.

RCA Outputs to Amplifier: Using the pre-amp RCA outputs to connect to an external amplifier is the best way to achieve high-quality audio. This allows the Android head unit to output a clean, low-level signal, which the amplifier then boosts to power your speakers.
Speaker-Level Outputs: Some Android head units offer speaker-level outputs, which can be connected directly to your car’s speakers. This is a simpler setup, but it may result in lower audio quality, especially if you have an upgraded audio system.
Digital Audio Output (SPDIF/Optical): Some high-end Android head units offer digital audio outputs (SPDIF or optical). Connecting to a digital amplifier via this method bypasses the head unit’s internal digital-to-analog converter (DAC), allowing the amplifier to handle the conversion. This can result in improved sound quality, especially if the amplifier has a superior DAC.
Equalizer and DSP Settings: Regardless of your output method, the equalizer and DSP settings on your Android head unit will significantly influence the listening experience. Experimenting with these settings allows you to tailor the sound to your preferences and compensate for the acoustics of your car’s interior. For example, boosting the bass frequencies can make music sound more powerful, while adjusting the mid-range frequencies can improve vocal clarity.

User Interface and Customization

The Android head unit is your gateway to a world of in-car entertainment and information. A well-designed user interface (UI) is crucial, as it directly impacts your overall driving experience. Fortunately, these units offer a high degree of customization, allowing you to tailor the system to your exact needs and preferences. Let’s delve into how to make your head unit truly your own.

User Interface Overview

The user interface of an Android head unit is generally designed to be intuitive and user-friendly, much like a modern smartphone or tablet. The goal is to provide easy access to features while minimizing distractions. Most units feature a large, responsive touchscreen display, making navigation a breeze. The UI typically comprises a home screen, app drawer, and various settings menus.

The home screen often displays frequently used apps, widgets, and customizable shortcuts.

Customizing the User Interface

Personalizing your head unit is a simple process, allowing you to create an interface that reflects your individual style and preferences. You’ll likely spend a lot of time interacting with the home screen, so tailoring it is key.

Wallpaper Selection: You can often change the background image to match your car’s interior or your personal taste. Most units allow you to select from pre-loaded wallpapers or use images stored on your device or a connected USB drive. Think of it as choosing a digital picture frame for your car.
App Arrangement: Rearrange the icons on your home screen to prioritize the apps you use most frequently. This is similar to organizing your phone’s home screen for easy access. Long-press an app icon, and then drag it to your desired location.
Widget Configuration: Widgets provide at-a-glance information and quick access to features. You can add widgets for things like weather updates, music controls, or even a speedometer. To add a widget, long-press on an empty space on the home screen and select “Widgets.” Choose the widgets you want and place them where you find them most useful.

Personalizing the User Experience

Beyond the basics of app arrangement and wallpaper selection, there are other ways to tailor your Android head unit to your liking.

Launcher Customization: Some units allow you to install alternative launchers, which completely change the look and feel of the UI. This provides even greater control over the layout and features. Consider it like changing the operating system on your computer.
Icon Packs: Changing the icons is another way to refresh the UI. You can install custom icon packs from the Google Play Store to give your head unit a unique visual style.
Theme Settings: Many units offer theme settings, allowing you to change the overall color scheme and visual elements of the interface. Experiment with different themes to find one that suits your preferences.
Gesture Control: Some Android head units support gesture control, letting you perform actions by swiping or tapping on the screen.
Sound Profiles: Adjust the audio settings to your liking. Create custom sound profiles to match different music genres or your preferred listening experience.

Troubleshooting Common Issues

So, you’ve taken the plunge and upgraded your E90’s infotainment system with a shiny new Android head unit. Congratulations! However, the road to in-car tech bliss isn’t always paved with rainbows and unicorns. Sometimes, things go a little sideways. Fear not, fellow enthusiasts! This section will equip you with the knowledge to diagnose and conquer the most common gremlins that might pop up after installation, ensuring you can enjoy your upgraded audio and connectivity without tearing your hair out.

Connectivity Problems

Having trouble connecting your phone, Wi-Fi, or even Bluetooth? Connectivity issues are arguably the most frequent post-installation headache. Let’s break down the usual suspects and how to wrangle them:

Bluetooth Pairing Issues: The head unit might not “see” your phone, or the pairing process could fail. This is often caused by incompatibility or incorrect pairing procedures.

Solution: Double-check the Bluetooth settings on both your phone and the head unit. Make sure Bluetooth is enabled and discoverable on your phone. Try forgetting the device on both ends and re-pairing. Ensure the head unit is in pairing mode.

Wi-Fi Connectivity Problems: Your head unit refuses to connect to your home Wi-Fi or mobile hotspot.

Solution: Verify your Wi-Fi password is correct. Ensure the head unit is within range of your Wi-Fi router or hotspot. Some head units only support 2.4 GHz Wi-Fi networks; check your router settings. Consider the physical location of the head unit; metal car components can interfere with Wi-Fi signals.

Cellular Data (if applicable): If your head unit has a SIM card slot and you’re experiencing data issues.

Solution: Ensure the SIM card is properly inserted and activated. Check your data plan and signal strength. Verify the APN (Access Point Name) settings are configured correctly for your mobile carrier.

GPS Signal Loss: Your navigation app shows a wandering cursor or a “no GPS signal” error.

Solution: The GPS antenna might not be properly connected or might be poorly positioned. Ensure the antenna is firmly connected to the head unit and placed somewhere with a clear view of the sky, typically on the dashboard. Check for any physical obstructions, such as tinted windows or metal objects, that could be blocking the signal.

Software Glitches

Android head units, like any software-driven device, can experience occasional hiccups. These can manifest as crashes, freezes, or unexpected behavior. Here’s how to troubleshoot these digital demons:

App Crashes and Freezes: An app suddenly quits or becomes unresponsive.

Solution: Close the app and reopen it. If the problem persists, try clearing the app’s cache and data in the Android settings (Settings > Apps). Update the app to the latest version from the Google Play Store. If all else fails, uninstall and reinstall the app.

System Freezes: The entire head unit becomes unresponsive.

Solution: Perform a soft reset by pressing the reset button (usually a small hole you can press with a paperclip) or by holding down the power button for an extended period. If the problem persists, consider a factory reset (Settings > System > Reset Options). Be warned: a factory reset will erase all your custom settings and data.

Boot Loop: The head unit gets stuck in a continuous startup cycle.

Solution: This is a more serious issue. Try a hard reset (if available) or contact the head unit manufacturer’s support. It might require reflashing the firmware.

Slow Performance: The head unit feels sluggish or takes a long time to respond to commands.

Solution: Close any unnecessary apps running in the background. Free up storage space by deleting unused files and apps. Consider installing a lighter launcher if the default one is resource-intensive.

Audio Malfunctions

Nothing spoils a drive like a dodgy audio system. Here’s how to diagnose and fix audio-related issues:

No Sound: Silence where music should be.

Solution: Check the volume level on the head unit and your phone (if connected via Bluetooth). Ensure the audio output is correctly selected (e.g., speakers). Verify the amplifier (if applicable) is powered on and functioning. Check the wiring connections for the speakers and the head unit. A blown fuse could also be the culprit.

Distorted Sound: Crackling, popping, or otherwise unpleasant audio.

Solution: Reduce the volume level. Check the speaker wiring for shorts or loose connections. The amplifier might be overloaded. Consider replacing the speakers or amplifier if the distortion persists.

Uneven Sound Distribution: Sound is louder from one speaker than another.

Solution: Check the balance and fader settings in the head unit’s audio settings. Verify the speaker wiring connections are correct. A faulty speaker or amplifier channel could also be the cause.

Subwoofer Issues: The subwoofer isn’t producing sound or is making strange noises.

Solution: Check the subwoofer’s power and ground connections. Verify the RCA cable connection between the head unit and the subwoofer amplifier. Adjust the subwoofer’s gain and crossover settings. The subwoofer itself might be faulty.

Troubleshooting Steering Wheel Controls

One of the most appealing features of an Android head unit is the ability to retain factory steering wheel controls. However, getting these to work flawlessly can sometimes be tricky.

Steering Wheel Controls Not Working: Buttons don’t respond to commands.

Solution: Ensure the head unit supports your car’s steering wheel controls. Verify the CAN bus adapter (if required) is properly connected and configured. Check the wiring connections for the steering wheel control interface. In the head unit’s settings, configure the steering wheel control buttons by mapping them to the desired functions (volume up, volume down, etc.). Sometimes, you need to “learn” the controls by pressing each button and assigning its function within the head unit’s settings.

Incorrect Button Mapping: Buttons perform the wrong functions.

Solution: Re-enter the steering wheel control settings and remap the buttons to their correct functions. Double-check the wiring connections for any potential errors. Some head units have preset profiles for specific car models; make sure you’ve selected the correct profile.

Intermittent Functionality: Steering wheel controls work sometimes but not others.

Solution: Check the wiring connections for loose contacts. Update the head unit’s firmware (if available). The CAN bus adapter might be faulty.

Brands and Pricing

Embarking on the journey to upgrade your BMW E90’s infotainment system involves navigating the landscape of Android head unit brands and their associated price tags. Understanding the options available, the features they offer, and the factors that influence their cost is crucial for making an informed decision. This section provides a comprehensive overview to guide you through the process.

Reputable Android Head Unit Brands

Several brands have established themselves as reliable manufacturers of Android head units specifically designed for the BMW E90. These brands often prioritize compatibility, ease of installation, and a user-friendly interface. Choosing a reputable brand typically ensures a more seamless integration with your vehicle and access to better customer support.

Eonon: Eonon is a well-known brand offering a range of Android head units for various car models, including the E90. They are often praised for their competitive pricing and comprehensive feature sets.
Pumpkin: Pumpkin provides a variety of Android head units, focusing on affordability and a wide array of features. They’re a popular choice for budget-conscious consumers.
Xtrons: Xtrons is known for its durable and feature-rich Android head units. They offer units with various screen sizes and advanced functionalities like built-in DSP (Digital Signal Processing).
Joying: Joying is a brand that typically focuses on high-quality components and sound performance, appealing to audiophiles. Their units often come with advanced audio customization options.
ATOTO: ATOTO offers a unique blend of features and price points. Their units often incorporate innovative features and user interface designs.
Dynavin: Dynavin is known for its OEM-style integration and high-quality construction. They offer units designed to look and feel like they came from the factory.

Price Ranges and Feature Comparison

The price of an Android head unit for your BMW E90 can vary significantly, reflecting the features, build quality, and brand reputation. Understanding the correlation between price and features will help you determine the best value for your needs.

Price Range	Features	Example Units (Note: Prices are approximate and may vary)
$200 – $400	Basic Android functionality, touchscreen display, Bluetooth, GPS navigation, and often a built-in amplifier. May include limited customization options.	Eonon GA9450B, Pumpkin Android 10/11 Head Units
$400 – $600	Expanded features like higher-resolution displays, more RAM and storage, built-in DSP for enhanced audio quality, and support for additional apps. May include more advanced user interface options.	Xtrons TE706PL, ATOTO S8 Series
$600+	Premium features like high-resolution displays (e.g., 1080p), advanced DSP, more powerful processors, high-quality components, and potentially integrated features like wireless CarPlay/Android Auto and better integration with factory systems.	Joying Android Head Units, Dynavin D8 Series

For example, a unit in the $200-$400 range might offer basic navigation and Bluetooth connectivity, while a unit in the $600+ range could boast a superior screen resolution, enhanced audio processing, and seamless integration with your phone’s ecosystem.

Factors Influencing Price

Several factors contribute to the final price tag of an Android head unit for your BMW E90. Understanding these influences can help you make a more informed purchasing decision.

Processor and RAM: More powerful processors and greater RAM capacity allow for faster performance, smoother multitasking, and improved overall responsiveness.
Display Quality: Higher resolution displays (e.g., 1080p) offer sharper images and a more enjoyable viewing experience, often commanding a higher price.
Build Quality: Units constructed with higher-quality materials and components tend to be more durable and reliable, contributing to a higher price point.
Audio Features: Built-in DSP, advanced equalizer settings, and support for high-fidelity audio formats can significantly impact the price.
Software Features: Wireless CarPlay/Android Auto integration, advanced voice control, and access to a wider range of pre-installed or downloadable apps can increase the cost.
Brand Reputation: Well-known brands with a history of quality and customer support often command a premium.
Additional Accessories: Bundled accessories like a backup camera, external microphones, and installation kits can influence the final price.
Market Demand and Competition: The level of competition among brands and the overall demand for Android head units in the market can affect pricing strategies.

Maintenance and Updates

Keeping your BMW E90 Android head unit humming along smoothly isn’t just about the initial setup; it’s a commitment to ongoing care. Regular maintenance and timely updates are the keys to unlocking the full potential of your in-car entertainment system, ensuring a responsive, feature-rich, and enjoyable experience for years to come. Think of it as giving your car’s brain a regular check-up and a shot of digital vitamins.

Let’s delve into the nitty-gritty of keeping your Android head unit in tip-top shape.

Updating Software on Your Android Head Unit

The software on your Android head unit, like any other piece of technology, requires periodic updates to fix bugs, improve performance, and add new features. These updates are typically provided by the head unit manufacturer.The process usually involves these steps:

Identifying the Current Software Version: Before you can update, you need to know what you’re currently running. Navigate to the “Settings” menu on your head unit. Look for an “About Device” or “System Information” section. Within this, you’ll find the current Android version, the kernel version, and potentially the firmware version specific to your head unit model.
Checking for Available Updates: Many head units have a built-in “System Update” or “Software Update” option within the Settings menu. Tap this to check if an update is available. Some units will automatically check for updates when connected to Wi-Fi. Alternatively, you might need to visit the manufacturer’s website to check for updates specific to your model.
Downloading the Update: If an update is available, you’ll typically be prompted to download it. This may involve downloading a file to your head unit directly, or downloading it to a USB drive or SD card for later installation. Ensure you have a stable Wi-Fi connection or that your USB drive/SD card is properly formatted and has sufficient storage space.
Installing the Update: Once the update file is downloaded, the head unit will guide you through the installation process. This usually involves tapping an “Install” button and waiting patiently. The head unit will likely reboot during the process.
Post-Update Verification: After the update is complete, verify that the new software version is installed correctly. Go back to the “About Device” or “System Information” section to confirm. Test out the head unit’s features to ensure everything is working as expected.

Important Considerations:

Always back up your data before starting a major software update. This ensures you can restore your settings if something goes wrong. Ensure your head unit is connected to a stable power source during the update to prevent interruptions. Read the update instructions carefully, and follow them precisely. If you’re unsure about any step, consult the manufacturer’s documentation or contact their support team.

Backing Up and Restoring Settings and Data

Losing your carefully curated settings, personalized app arrangements, and saved data can be a real headache. Fortunately, most Android head units offer methods for backing up and restoring your data.Here’s a breakdown of the process:

Identifying Backup Options: Explore the “Settings” menu of your head unit. Look for sections like “Backup & Reset,” “Accounts,” or “System.” The exact options will vary depending on the manufacturer and Android version.
Utilizing Built-in Backup Features: Many Android head units support Google account backups. If you’ve logged in with your Google account, your settings, app data, and contacts may be automatically backed up to Google’s servers. You can often manage these backups through your Google account settings.
Using Third-Party Backup Apps: If your head unit lacks robust built-in backup options, consider using third-party backup apps from the Google Play Store. These apps can often back up a wider range of data, including app data, settings, and even SMS messages.
Creating Manual Backups: Some head units allow you to manually back up data to an external storage device, such as a USB drive or SD card. This might involve copying specific files or folders containing your settings and data. Refer to your head unit’s manual for instructions on how to locate these files.
Restoring Data: When restoring data, you’ll typically need to navigate back to the “Backup & Reset” or “Accounts” section in the Settings menu. Select the option to restore from your backup source (Google account, USB drive, etc.). Follow the on-screen prompts to complete the restoration process.

Example: Imagine you spend hours customizing your home screen with widgets, arranging your favorite apps, and configuring your audio settings. A sudden factory reset or a software glitch could wipe all of that away. By backing up your settings, you can restore your customized setup in minutes, saving you time and frustration.

Keeping the Unit Running Smoothly and Efficiently

Maintaining your Android head unit is an ongoing process. Simple habits can significantly improve its performance and extend its lifespan.Here are some tips:

Regularly Clear the Cache: Over time, apps accumulate cached data, which can slow down performance. Go to “Settings” > “Apps” and clear the cache for frequently used apps.
Uninstall Unused Apps: Remove apps you no longer use to free up storage space and reduce background processes.
Manage Storage Space: Keep an eye on your storage space. Delete unnecessary files, such as downloaded music or videos, to prevent the head unit from running out of space.
Update Apps: Keep your apps updated to benefit from performance improvements, bug fixes, and new features.
Monitor Battery Usage: Check which apps are consuming the most battery power. Consider limiting background activity for power-hungry apps.
Optimize Performance Settings: Some head units offer performance settings, such as “Performance Mode” or “Battery Saver.” Adjust these settings to balance performance and battery life according to your preferences.
Protect from Extreme Temperatures: Avoid exposing your head unit to extreme temperatures, as this can damage its components. Park your car in the shade during hot weather and avoid leaving it in freezing temperatures for extended periods.
Keep the Unit Clean: Gently clean the screen and surrounding areas with a soft, microfiber cloth to remove dust and fingerprints. Avoid using harsh chemicals or abrasive cleaners.
Restart Regularly: Just like your smartphone, restarting your head unit periodically can help clear temporary files and improve performance.

Example: Consider a scenario where you’ve installed a large number of apps and haven’t cleared the cache in months. Your head unit might start to lag, apps might take longer to load, and the overall user experience will suffer. By regularly clearing the cache and uninstalling unused apps, you can restore the unit’s responsiveness and enjoy a smoother experience.

Alternatives and Comparisons

Upgrading your BMW E90’s infotainment system is an exciting endeavor, and you have options beyond just a dedicated Android head unit. Let’s delve into the landscape of alternatives, comparing them based on features, cost, and overall user experience. This comparison will help you make an informed decision that best suits your needs and budget.

Apple CarPlay/Android Auto Adapters

These adapters, often referred to as “CarPlay/Android Auto retrofit kits,” provide a pathway to integrate your smartphone’s functionalities with your existing iDrive system. They are designed to work with the original BMW screen and controls, offering a relatively seamless integration.

Pros:

Integration with Existing System: These adapters utilize your car’s original display and controls, preserving the factory look and feel. This can be a significant advantage for those who value maintaining the car’s original aesthetic.
Smartphone Connectivity: They provide native support for Apple CarPlay and Android Auto, granting access to navigation (Google Maps, Waze, Apple Maps), music streaming (Spotify, Apple Music, YouTube Music), and hands-free calling/texting through your smartphone.
Relatively Easy Installation: Installation is typically less complex than replacing the entire head unit, often involving plug-and-play connections and minimal modifications to the vehicle’s wiring.
Cost-Effective (in some cases): Compared to a full Android head unit replacement, these adapters can be a more budget-friendly option, especially if you already appreciate the functionality of your current iDrive system.

Cons:

Limited Functionality: They are primarily focused on smartphone integration and may not offer the same breadth of features as a full Android head unit, such as built-in GPS, access to the Google Play Store, or advanced customization options.
Reliance on Smartphone: Their functionality is dependent on your smartphone’s connection (wired or wireless). Without a connected phone, the system is essentially dormant.
Compatibility Issues: Compatibility can be a concern, especially with older iDrive versions. Thorough research is essential to ensure the adapter works flawlessly with your specific BMW model and iDrive configuration.
User Interface Limitations: While they integrate with the original iDrive controls, the user interface might not be as intuitive or responsive as a dedicated Android head unit’s touchscreen interface.

Factory iDrive System with Smartphone Integration (if available)

Some BMW E90 models, particularly those equipped with newer iDrive systems, may offer some degree of smartphone integration, either natively or through optional features. This can include Bluetooth connectivity for phone calls and music streaming.

Pros:

Factory-Installed Reliability: These systems are designed and integrated by BMW, ensuring a high level of reliability and compatibility with the vehicle’s other systems.
Seamless Integration: The user interface is designed to seamlessly integrate with the car’s existing controls and display.
Potential for Over-the-Air Updates: Some systems may receive software updates from BMW, improving functionality and addressing any potential issues.
Preserves Factory Appearance: You retain the original look and feel of your BMW’s interior.

Cons:

Limited Features: Compared to aftermarket solutions like Android head units or CarPlay/Android Auto adapters, factory systems often have fewer features and customization options.
Potentially Outdated Technology: The technology in these systems can quickly become outdated compared to the latest advancements in aftermarket solutions.
Cost of Upgrades: Upgrading a factory iDrive system to include features like smartphone integration can be expensive, often requiring the purchase of additional options or a complete system replacement.
Lack of Openness: Factory systems are generally closed and do not allow for the installation of third-party apps or extensive customization.

Scenarios for Choosing Each Option

The best choice depends on your priorities. Here are some examples:

Android Head Unit: Ideal if you want the most features, customization, and access to a wide range of apps. This is the best choice if you are seeking a completely updated infotainment experience. For example, a tech-savvy user who wants to install navigation apps, stream music, and enjoy a modern user interface might find an Android head unit the best fit.
Apple CarPlay/Android Auto Adapter: Best if you value smartphone integration and want to retain the original look of your car. This is a good choice if you prioritize convenience and easy access to navigation, music, and communication features through your phone. Consider this if you have a budget constraint. For instance, a user who values a clean look and primarily uses their phone for navigation and music streaming could benefit from an adapter.
Factory iDrive System: Best if you prioritize reliability, seamless integration, and maintaining the car’s original aesthetic. If you’re not overly concerned with the latest features and prefer a factory-installed solution, the original system might be adequate. For example, a driver who prioritizes simplicity and appreciates the BMW brand’s design and reliability might be satisfied with the original iDrive system, especially if it already includes Bluetooth connectivity.