Introduction
This manual provides detailed instructions for the Fydun USB Music Interface AMI MMI AUX MP3 Cable Adapter, model 4F0051510G. This adapter is designed to integrate USB audio playback and charging capabilities with compatible vehicle infotainment systems. Please read this manual thoroughly before installation and use to ensure proper function and safety.

Figure 1: Overview of adapter benefits, including solving issues like misplaced cables, providing a USB interface for audio and charging, and featuring a compact cable design.
Setup Instructions
The Fydun USB Music Interface is designed for plug-and-play functionality. Follow these steps to connect the adapter to your vehicle's AMI/MMI system.
- Verify Compatibility: Ensure your vehicle is equipped with an AMI (Audi Music Interface) or MMI (Multi Media Interface) system. This adapter is suitable for Audi S4, S5, S6, and TTS models from 2009 onwards with AMI, and is compatible with third-generation MMI systems. Refer to your vehicle's user manual or consult a local distributor for the correct AMI/MMI part number (e.g., 4F0051510G).
- Locate AMI/MMI Port: Identify the AMI/MMI port in your vehicle, typically found in the glove compartment, center console, or armrest.
- Connect Adapter: Insert the multi-pin connector end of the Fydun USB adapter into the vehicle's AMI/MMI port. Ensure a secure connection.
- Connect USB Device: Plug your USB flash drive, MP3 player, mobile phone, or tablet into the USB-A female port of the adapter.
- System Recognition: Your vehicle's infotainment system should automatically recognize the connected USB device. Select the AMI/MMI source from your car's audio menu to access the USB device.

Figure 2: The Fydun USB adapter installed in a vehicle's console.

Figure 3: Connection diagram for music and charging.
Operating Instructions
Once connected, the Fydun USB Music Interface allows you to play audio from your USB devices and charge them simultaneously.
- Audio Playback: Use your vehicle's infotainment system controls to navigate and select audio files from the connected USB device. The system should display folders and tracks similar to a CD changer or external media device.
- Charging: The adapter supports charging of audio equipment when connected. Ensure your device is compatible with USB charging via the vehicle's system.
- Supported Devices: The adapter is compatible with MP3 players, mobile phones, tablets, USB flash drives, USB thumb drives, USB memory sticks, USB pen drives, and USB portable external hard disk drives.
Maintenance
To ensure the longevity and optimal performance of your Fydun USB Music Interface, follow these simple maintenance guidelines:
- Cleaning: Use a soft, dry cloth to gently wipe the adapter and its connectors. Avoid using liquid cleaners or abrasive materials.
- Storage: When not in use, store the adapter in a cool, dry place away from direct sunlight and extreme temperatures.
- Handling: Avoid bending or twisting the cable excessively, as this can damage the internal wiring. Always grasp the connector ends when plugging or unplugging the adapter.
Troubleshooting
If you encounter issues with your Fydun USB Music Interface, refer to the following common problems and solutions:
- No Audio Output or Device Not Recognized:
- Check Compatibility: Verify that your vehicle model and year (e.g., Audi S4, S5, S6, TTS 2009+ with AMI, third-generation MMI) are compatible with the adapter. Confirm the correct part number (4F0051510G).
- Secure Connection: Ensure the adapter is firmly plugged into the vehicle's AMI/MMI port and your USB device is securely connected to the adapter.
- Vehicle System Settings: Make sure the correct audio source (AMI/MMI) is selected on your car's infotainment system.
- USB Device Format: Confirm that your USB device is formatted correctly and contains supported audio file types. Some systems may have limitations on file systems (e.g., FAT32) or audio formats (e.g., MP3, WMA).
- Test with Another Device: Try connecting a different USB device (e.g., a different flash drive or phone) to rule out an issue with the original device.
- Device Not Charging:
- Check Connection: Ensure the USB device is properly connected.
- Power Output: Some larger devices (e.g., certain tablets or external hard drives) may require more power than the vehicle's USB port can provide, preventing charging or causing slow charging.
- Vehicle Ignition: Charging typically only occurs when the vehicle's ignition is on.
- Intermittent Connection:
- Inspect Connectors: Check both the adapter's connectors and the vehicle's AMI/MMI port for any debris or damage.
- Cable Integrity: Ensure the cable is not kinked, pinched, or damaged.

Figure 4: Compatibility information for various vehicle models.
Specifications
| Feature | Detail |
|---|---|
| Model Number | 4F0051510G |
| Product Dimensions | 8.66 x 4.33 x 0.59 inches (22 cm x 11 cm x 1.5 cm) |
| Item Weight | 0.704 ounces (20 grams) |
| Cable Length | 27 cm / 10.63 inches |
| Wire Diameter | 0.4 cm / 0.16 inches |
| Connector Type | AMI/MMI to USB-A Female |
| Compatible Devices | MP3 Player, Mobile Phones, Tablets, USB Flash Drives, USB Portable External Hard Disk Drives |
| Features | Plug and Play, Supports Hot Plug, Charges Audio Equipment |
Warranty Information
Fydun products are manufactured to high-quality standards. This product comes with a standard manufacturer's warranty against defects in materials and workmanship. For specific warranty terms and conditions, please refer to the documentation included with your purchase or contact Fydun customer support.
Support Information
For technical assistance, troubleshooting, or any questions regarding the Fydun USB Music Interface AMI MMI AUX MP3 Cable Adapter, please contact Fydun customer support. You can typically find contact information on the product packaging, the Fydun official website, or through your retailer.