1. Introduction
The XHORSE XNAU02EN Wireless Universal Remote Key is a high-quality, 4-button remote designed for use with the VVDI Key Tool. Featuring an NXP chip and an Audi-style design, this remote key provides reliable wireless functionality for vehicle access and control. This manual provides essential information for the proper setup, operation, and maintenance of your XNAU02EN remote key.
2. Product Overview
The XHORSE XNAU02EN remote key is a versatile solution for automotive key replacement and duplication. It comes in an original size and features a durable plastic casing. The internal circuit board includes an NXP chip for secure communication and control.

Figure 1: XHORSE XNAU02EN Wireless Remote Key (Audi Style) and its internal circuit board, highlighting the NXP chip and battery socket.

Figure 2: Front view of the XHORSE flip wireless remote key (4 buttons) with key product specifications.

Figure 3: Detailed view of the internal circuit board, showing the power chip, control chip, buttons, and CR2032 battery socket.
3. Specifications
| Feature | Detail |
|---|---|
| Model Number (PN) | XNAU02EN |
| Number of Buttons | 4 |
| Transponder | Yes |
| Product Size | 2.97 x 1.41 x 0.77 inches (7.54 x 3.58 x 1.96 cm) |
| Product Weight | 1.856 oz (52.61 grams) |
| Battery Model | CR2032 (not included) |
| Material | Plastic |
| R/C Function | WITH |
| Customization | No |
| Country/Region of Car Manufacture | China |
| Compatibility | VVDI Key Tool |
4. Setup
4.1 Battery Installation
- Carefully open the remote key casing. Refer to Figure 4 for a visual guide on the disassembled key components.
- Locate the battery socket on the circuit board (Figure 3).
- Insert a new CR2032 battery into the socket, ensuring correct polarity (+ side up).
- Close the remote key casing securely.

Figure 4: Disassembled view of the remote key showing the outer casing, circuit board with battery, and back cover.
4.2 Key Programming
The XHORSE XNAU02EN remote key requires programming to function with your specific vehicle. This process typically involves using a specialized diagnostic tool, such as the VVDI Key Tool, to pair the remote with your car's immobilizer system. It is highly recommended that key programming be performed by a qualified automotive locksmith or technician to ensure proper functionality and security.
- Consult your VVDI Key Tool manual for specific programming instructions for Audi-style keys.
- Ensure the vehicle's battery is adequately charged during the programming process.
5. Operating Instructions
Once successfully programmed, the XNAU02EN remote key operates like a standard vehicle remote. The 4 buttons typically correspond to the following functions:
- Lock Button: Press to lock all vehicle doors.
- Unlock Button: Press to unlock all vehicle doors.
- Trunk Release Button: Press to open the vehicle's trunk or tailgate.
- Panic Button: Press and hold to activate the vehicle's alarm system (horn and lights).
Ensure you are within range of your vehicle for the remote functions to work correctly. Obstructions or interference may affect the remote's range.

Figure 5: Angled view of the assembled XHORSE wireless remote key.
6. Maintenance
- Battery Replacement: Replace the CR2032 battery when the remote's range decreases or it stops responding. Refer to Section 4.1 for battery installation steps.
- Cleaning: Wipe the remote key with a soft, dry cloth. Avoid using harsh chemicals or abrasive materials that could damage the plastic casing or buttons.
- Storage: Store the remote key in a cool, dry place away from direct sunlight and extreme temperatures.
- Avoid Water Exposure: The remote key is not waterproof. Avoid exposing it to water or excessive moisture.
7. Troubleshooting
- Remote Not Responding:
- Check the battery. Replace the CR2032 battery if it is low or dead.
- Ensure the key is properly programmed to your vehicle. If it was recently programmed, re-verify the steps or consult a technician.
- Check for signal interference from other electronic devices.
- Reduced Range:
- The battery may be low. Replace the CR2032 battery.
- Environmental factors (e.g., large buildings, radio interference) can affect range.
- Buttons Not Functioning:
- Inspect buttons for physical damage or debris.
- If only specific buttons fail, it might indicate an internal circuit board issue, requiring professional inspection.
8. User Tips
- Always keep a spare key, if possible, in case of loss or malfunction of your primary remote.
- When replacing the battery, ensure you use a high-quality CR2032 battery to maximize performance and lifespan.
- If you experience persistent issues, it is often best to consult a professional automotive locksmith or technician who has the necessary diagnostic tools.
9. Warranty and Support
For warranty information, technical support, or service inquiries, please contact the seller or manufacturer directly. Keep your purchase receipt as proof of purchase. Any unauthorized modification or improper use of the product may void the warranty.





