1. Introduction
This manual provides detailed instructions for the installation, operation, and features of your new CHSTEK Android 13 Car Radio Stereo Head Unit. Designed for seamless integration into compatible Porsche models, this unit offers advanced functionalities including Wireless CarPlay, Wired Android Auto, 4G/WiFi connectivity, a powerful DSP sound system, and GPS navigation. Please read this manual thoroughly before installation and use to ensure optimal performance and safety.
2. Vehicle Compatibility
This head unit is compatible with the following Porsche models:
- Porsche 911 (996 MK2) 2003-2005
- Porsche 911 (997) 2005-2009
- Porsche Boxster/Cayman 2003-2009
- Porsche Cayenne 2003-2009
Important Compatibility Notes:
- This model does not have a built-in DVD/CD player or SD card slot. External media can be connected via USB.
- For vehicles with an original BOSE sound system or fiber optic power amplifier, an additional fiber optic box is required for sound functionality. Please contact support for details. Note that aftermarket fiber optic boxes typically support only front dual-channel speakers.
- Some high-grade versions of vehicles, such as the Cayman 2010-2012, may not support steering wheel control keys.
- 4G network function is not supported in the Americas (e.g., United States, Canada, Mexico, Brazil) and in Japan and South Korea due to differing carriers and network baseband.


3. Key Features
- Operating System: Android 13
- Processor: Octa-core CPU (e.g., 6*ARM Cortex-A55 @ 1.8GHz + 2*ARM Cortex-A75 @ 2.0GHz for highest configurations)
- Memory: Up to 12GB RAM + 256GB ROM (depending on configuration)
- Display: 7-inch Touch Screen with 1024*600P resolution
- Connectivity: Built-in WiFi, 4G LTE SIM Card Slot (regional restrictions apply), Bluetooth 5.0
- Smartphone Integration: Built-in Wireless CarPlay and Wired Android Auto
- Audio: DSP Sound System with EQ settings (e.g., 15-band, 16-band, 18-band, 30-band, 36-band EQ), 3D Surround Sound, Bass Enhancement, Bass Filter
- Navigation: Built-in GPS/GLONASS
- Radio: FM/AM band with RDS function (for European users)
- Control: Support Steering Wheel Control, Customizable Colorful Light Buttons
- Camera Support: Support Backup Camera (AHD 1080P input), Front Parking Camera, ADAS DVR Camera, 360° Panoramic Camera System (requires specific hardware option)
- Multimedia: MP3, MP4, WMA, JPEG digital media format support
- Other Features: Split Screen Function, Mirrorlink/Phonelink, Tire Pressure Monitoring System (TPMS), HDMI/AV-Out


4. Installation
Professional installation is highly recommended. Incorrect installation can lead to damage to the unit or your vehicle. Always test the unit thoroughly before finalizing the installation.
4.1 Pre-Installation Checks
- Verify vehicle compatibility (refer to Section 2).
- Identify if your vehicle has a BOSE sound system or fiber optic amplifier. If so, ensure you have the necessary fiber optic box.
- Disconnect the vehicle's battery before starting any electrical work.
4.2 Wiring Diagram
The following diagram illustrates the general wiring connections for the head unit. Specific connections may vary slightly based on your vehicle model and chosen options (e.g., 360 camera, DVR). Refer to the detailed diagram for your specific unit.

4.3 Fiber Optic Amplifier Connection
If your original car is equipped with a BOSE sound system or a fiber optic amplifier, you will need to use a MOST-PCML fiber optic box to ensure sound functionality. This box converts the digital fiber optic signal to an analog signal compatible with the new head unit.

4.4 Post-Installation
- Reconnect the vehicle's battery.
- Power on the head unit and perform initial setup.
- Test all functions: radio, Bluetooth, CarPlay/Android Auto, navigation, steering wheel controls, and any connected cameras.
5. Operation
5.1 Basic Interface and Navigation
The unit runs on Android 13, providing a familiar smartphone-like interface. Navigate through apps and settings using the touchscreen. Various UI themes are available depending on your unit's specific chip (e.g., FY818, FY8581, FY7862, MT8667, QCM6125, UIS7870A).






5.2 Bluetooth 5.0
Connect your smartphone via Bluetooth 5.0 for hands-free calling and music streaming. The unit supports faster transfer speeds, wider coverage, and enhanced anti-interference. You can display incoming/outgoing/missed calls, download your phonebook, and sync music.

5.3 Wireless CarPlay
Connect your iPhone wirelessly to access CarPlay features. This provides a smarter and safer way to use your iPhone for navigation, calls, messages, and music directly on the car's display.

5.4 Wired Android Auto
Connect your Android device via USB for Wired Android Auto. Mirror features like GPS mapping/navigation, music playback, SMS, and telephone directly to the head unit's screen.

5.5 Internet Connectivity (WiFi/4G)
The unit supports built-in WiFi and a 4G SIM card slot (check regional compatibility). Connect to any network hotspot via WiFi or insert a 4G SIM card to access online navigation, streaming music/video, and download apps from the Google Play Store.

5.6 DSP Sound System
Customize your audio experience with the integrated DSP (Digital Sound Processor). Adjust EQ settings, utilize 3D Surround Sound, Bass Enhancement, and Bass Filter functions to optimize sound quality.
- EQ Settings: Fine-tune treble, midrange, and bass for a richer sound.
- 3D Surround Sound: Adjust sound output timing from individual speakers to create an immersive audio experience.
- Bass Enhancement: Boost bass frequencies for more powerful and flexible low-end sound.
- Bass Filter: Filter out bass frequencies to emphasize delicate middle and high tones.

5.7 Steering Wheel Control
The unit is compatible with most steering wheel control functions, allowing you to safely switch songs, channels, and adjust volume without taking your hands off the wheel.

5.8 Radio Function
The built-in radio supports automatic and manual station search. For European users, the RDS function automatically selects the most stable frequency for a station.

5.9 Split Screen Function
Utilize the split screen feature to run two applications simultaneously, such as navigation and music playback. Note that some third-party apps may not fully support this feature if functions conflict.

5.10 Camera Support (Optional)
The unit supports various camera inputs:
- Backup Camera: Automatically switches to the reverse screen with parking lines when reversing.
- Front ADAS DVR: Provides 1080P live display and recording, with Advanced Driving Assistance System features for safer driving.
- 360° Panoramic Camera System: (Requires specific hardware option) Uses four 220° ultra-wide-angle lenses to capture a seamless 360° aerial view, eliminating blind spots.
Note on 360° Camera Function:
The 360 panorama function requires hardware support from the factory. If you did not purchase the 360 chip hardware option, your screen will not support this function.

5.11 Colorful Light Buttons
Customize the color of the built-in button lights to match your vehicle's interior or your personal preference.

6. Troubleshooting
- No Sound: If your vehicle has a BOSE or fiber optic amplifier, ensure the fiber optic box is correctly installed and connected. Without it, sound will not work.
- Steering Wheel Controls Not Working: Verify compatibility with your specific vehicle model and trim. Some high-grade versions may not support this feature. Check wiring connections for steering wheel control.
- 4G Network Not Functioning: Confirm your region supports 4G connectivity for this device (Americas, Japan, and South Korea are not supported). Ensure the SIM card is correctly inserted and activated.
- Unit Not Powering On: Check all power connections (B+, ACC, GND) and ensure the vehicle's battery is properly connected. Verify fuses.
- Touchscreen Unresponsive: Try restarting the unit. If the issue persists, contact technical support.
- Apps Crashing/Slow Performance: Ensure sufficient free storage and RAM. Close unnecessary background applications. Consider a factory reset if problems persist (note: this will erase all user data).
7. Specifications
Below is a general overview of product parameters. Specific values may vary based on the chosen version (e.g., FY818, FY8581, FY7862, MTK8667, Qualcomm 6125, FY7870).

| Feature | Description |
|---|---|
| Operating System | Android 13 |
| CPU | Octa-core (e.g., 6*A55 + 2*A75) |
| RAM | Up to 12GB |
| ROM | Up to 256GB |
| Display Size | 7 inches |
| Resolution | 1024*600P |
| Internet | WiFi, 4G SIM+WiFi (regional restrictions apply) |
| Navigation | GPS+GLONASS |
| CarPlay/Android Auto | Built-in Wireless CarPlay & Wired Android Auto |
| Bluetooth | Bluetooth 5.0 |
| Radio IC | QN8035(FM) or TDA7708 (AM/FM band RDS) |
| Amplifier IC | PT2313, ROHM32107 4x50W, TDA7851 4x50W, TCB503 4x50W |
| DSP | 15-36 Band EQ (depending on version) |
| Item Weight | 1.8kg |
| Voltage | 12 V |
| Certification | CE |
8. Warranty and Support
8.1 Warranty Information
All CHSTEK products come with a 12-month manufacturer's warranty. This warranty covers defects in materials and workmanship under normal use. The warranty does not cover damage resulting from:
- Improper installation or operation.
- Accidents, misuse, or abuse.
- Improper wiring or incorrect voltage.
- Undue wear and tear, dirt.
- Disassembly or repair by unauthorized personnel.
- Damages caused by improper packaging during return shipment.
To claim warranty service, please provide proof of purchase and a detailed description of the issue, including clear pictures or videos if applicable.
8.2 Technical Support
If you encounter any issues during installation or operation, it is recommended to seek assistance from a professional installer. For further technical support or inquiries regarding your product, please contact CHSTEK customer service. Do not attempt to disassemble or repair the unit yourself, as this may void your warranty.