1. Introduction
This manual provides instructions for the installation, operation, and maintenance of your Junsun 8.8-inch Touch Screen Car Radio Stereo. This multimedia receiver is designed to upgrade the in-car entertainment system for compatible BMW models, offering advanced features like wireless CarPlay and Android Auto functionality.
2. Setup and Installation
2.1 Applicable Car Models
This unit is compatible with the following BMW models:
- BMW 3 Series (2009-2012): E90, E91, E92 (Models: 323i, 325i, 328i, 335i, 335is)
- BMW 5 Series (2009-2012): E60, E61, E63, E64
Important Installation Note: Please verify that your OEM display has the Aux Audio Menu. If this menu is not present, an activator (ASIN: B08XXF2T5Q) may be required to enable Aux Audio functionality before installation.
2.2 Package Contents
The package typically includes the following components:
- 8.8-inch Touch Screen Car Radio Stereo Unit
- Power Connection Cable
- USB Cable
- LVDS 10-pin Connector
- Installation Tools (e.g., pry tool, screwdriver)

Image: Overview of the Junsun 8.8-inch Car Radio Stereo components, showing the main display unit, various cables, and basic installation tools.
2.3 General Installation Guidelines
Professional installation is recommended to ensure proper functionality and to avoid damage to your vehicle's electrical system. Ensure the vehicle's power is disconnected before beginning installation. Follow the specific wiring diagrams provided with your unit for connecting the power, USB, and LVDS cables. The unit is designed to integrate with the existing vehicle system, retaining original features.

Image: Illustration detailing the applicable BMW models and years (2005-2008 CCC system) for the Junsun 8.8-inch unit, highlighting the 10-pin LVDS connector compatibility.
3. Operating Instructions
3.1 Retaining Original Vehicle Functions
The upgraded touch screen system is designed to preserve your car's original features, including radio, amplifier functions, factory joystick controls, and the original backup camera. You can switch between the new system and the original car interface seamlessly.
3.2 Wireless CarPlay and Android Auto
Connect your smartphone wirelessly to access navigation, music, messages, and other compatible apps directly on the 8.8-inch display. The system supports both Apple CarPlay and Android Auto for a connected driving experience.

Image: The Junsun 8.8-inch display showcasing the Wireless CarPlay interface with common applications and voice command prompts.
3.3 Bluetooth Connectivity
Utilize the built-in Bluetooth for hands-free calling and wireless music streaming. The integrated microphone ensures clear communication, and audio plays through your car's speakers. Easily answer or make calls and control your music without distractions.

Image: The Junsun 8.8-inch display demonstrating Bluetooth music playback and a hands-free phone call interface.
3.4 Steering Wheel Control
Maintain full control of your stereo system without removing your hands from the steering wheel. The Steering Wheel Control feature allows for effortless adjustment of volume, track changes, and call management.
3.5 Mirror Link Function
The Mirror Link function allows you to display your iOS or Android phone screen directly onto the car stereo. This feature supports various applications, including YouTube, and can integrate with original factory cameras and aftermarket reverse cameras.
3.6 Rear Camera Support
The car stereo supports your original factory backup camera. Additionally, you have the option to connect and utilize an aftermarket backup camera for enhanced visibility when reversing.

Image: The Junsun 8.8-inch display showing a clear rear camera feed with parking assistance lines and a visual representation of parking sensors.
3.7 Video Demonstration
Video: This demonstration shows the 8.9-inch Linux Touchscreen in a BMW 3 Series, highlighting its features such as CarPlay, Android Auto, original vehicle system retention, touch functionality, map navigation, music playback, steering wheel control, voice control, and support for OEM/aftermarket rear cameras.
4. Maintenance
4.1 Cleaning the Display
To clean the touch screen, use a soft, lint-free cloth. For stubborn smudges, lightly dampen the cloth with water or a screen-safe cleaner. Avoid abrasive materials or harsh chemicals that could damage the screen surface.
4.2 Software Updates
Periodically check for software updates to ensure optimal performance and access to the latest features. Refer to the manufacturer's website or the device's settings for update procedures.
5. Troubleshooting
5.1 Common Issues and Solutions
- No Audio Output: Ensure the Aux Audio Menu is activated in your OEM display. If not, an activator may be required. Check all audio connections.
- Screen Goes Black/Freezes: Try restarting the vehicle or the head unit. Check power connections. Ensure software is up to date.
- Bluetooth/CarPlay Connection Issues: Ensure Bluetooth is enabled on your phone and the head unit. Forget and re-pair the device. Check for any interference.
- Steering Wheel Controls Not Working: Verify all wiring connections, especially the CAN-bus connections. Ensure the feature is enabled in the unit's settings.
For persistent issues, consult the Junsun customer support or a qualified automotive electronics technician.
6. Specifications
| Feature | Detail |
|---|---|
| Screen Size | 8.8 Inches |
| Operating System | Android |
| Connectivity Technology | Bluetooth |
| Special Feature | Bluetooth |
| Map Type | North America |
| Audio Output Mode | Stereo, Surround |
| Mounting Type | Dashboard Mount |
| Compatible Devices | Smartphone |
| Supported Satellite Navigation System | GPS |
| Item Weight | 1.5 Kilograms |
| Parcel Dimensions | 31.9 x 19.71 x 16.41 cm |
7. Warranty and Support
7.1 Product Warranty
This product comes with a standard manufacturer's warranty. Please refer to the warranty card included in your package or visit the official Junsun website for detailed warranty terms and conditions.
7.2 Customer Support
For technical assistance, troubleshooting, or any inquiries regarding your Junsun 8.8-inch Touch Screen Car Radio Stereo, please contact Junsun customer support through their official website or the contact information provided in your product documentation.