1. Introduction
This instruction manual provides essential information for the installation and understanding of the Kufatec LED USA to LED EU Facelift Adapter. This specific adapter kit is designed to enable the conversion of Audi A5 / S5 8T vehicles from USA-specification LED taillights to EU Facelift LED taillights.
The adapter ensures proper electrical connection and functionality, allowing for a seamless upgrade or modification of your vehicle's lighting system. Please read all instructions carefully before proceeding with installation.
2. Product Overview

Figure 1: Kufatec LED USA to LED EU Facelift Adapter Kit Components
This image displays the components of the Kufatec adapter kit. It includes several wiring harnesses with black and green connectors, designed to facilitate the conversion of vehicle taillights. A thin black wire with a red component is also visible, likely part of the electrical connection. These components are engineered for a custom and easy adaptation process.
Key Features:
- Specific adapter kit for Audi A5 / S5 8T.
- Facilitates conversion from USA LED taillights to EU Facelift LED taillights.
- Designed for easy and custom-fit installation.
3. Setup and Installation
3.1. Package Contents
The Kufatec LED USA to LED EU Facelift Adapter kit includes:
- Specific adapter wiring harnesses.
Note: The actual LED Facelift taillights are not included with this adapter kit and must be purchased separately.
3.2. Compatibility
This adapter kit is compatible with:
- Audi A5 / S5 8T models.
3.3. Installation Procedure
Installation of the adapter kit is designed to be straightforward due to its custom-fit nature. However, professional installation is recommended to ensure correct wiring and vehicle coding.
- Ensure the vehicle's electrical system is powered off before beginning installation.
- Locate the existing taillight wiring harnesses on your Audi A5 / S5 8T.
- Connect the Kufatec adapter harnesses between the vehicle's existing wiring and the new EU Facelift LED taillights. The connectors are designed to fit specific ports.
- Secure all connections to prevent loosening due to vehicle vibrations.
- Once the physical installation is complete, the vehicle must be coded to recognize and properly operate the new EU Facelift LED taillights.
Important Coding Note:
After installing the adapter and the new LED Facelift taillights, the vehicle's control unit requires specific coding. This coding process is crucial for the taillights to function correctly (e.g., turn signals, brake lights, running lights). If you are unfamiliar with vehicle coding procedures or do not have the necessary diagnostic tools, it is strongly advised to seek assistance from a qualified automotive technician or an Audi specialist.
For users who do not have the coding values or prefer a complete solution, Kufatec offers a full kit (item number 38860-3) which may include coding dongles or pre-programmed modules. Please refer to Kufatec's official website or your dealer for more information on this complete kit.
4. Operation
The Kufatec adapter is a passive component that facilitates the electrical communication between your Audi A5 / S5 8T (USA specification) and the EU Facelift LED taillights. Once correctly installed and the vehicle has been properly coded, the taillights will operate as intended for the EU specification.
There are no user-operable controls on the adapter itself. Its function is to ensure compatibility and correct signaling for the new taillight units.
5. Maintenance and Care
The Kufatec LED USA to LED EU Facelift Adapter is designed for long-term, maintenance-free operation once installed correctly. It contains no user-serviceable parts.
- Cleaning: If the adapter or its connectors become dirty during installation, gently wipe them with a clean, dry cloth. Do not use liquid cleaners or solvents.
- Inspection: Periodically, during other vehicle maintenance, you may visually inspect the adapter connections to ensure they remain secure and free from corrosion or damage.
- Storage: If the adapter is not immediately installed, store it in its original packaging in a cool, dry place away from direct sunlight and extreme temperatures.
6. Troubleshooting
Most issues related to the installation of this adapter kit stem from incorrect coding or improper connections. Refer to the following common issues and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| New taillights do not function or function incorrectly (e.g., wrong light patterns, error messages). | Vehicle not coded or incorrectly coded for EU Facelift LED taillights. | Ensure the vehicle has been correctly coded using appropriate diagnostic tools and coding values for the EU Facelift LED taillights. Consult an Audi specialist or refer to Kufatec's coding instructions. |
| Intermittent light function or no function. | Loose or improperly seated electrical connections. | Check all adapter connections to ensure they are fully seated and secure. Disconnect and reconnect if necessary. |
| Physical damage to adapter or connectors. | Improper handling during installation. | Inspect the adapter and connectors for any visible damage. If damaged, the adapter may need to be replaced. |
If troubleshooting steps do not resolve the issue, please contact Kufatec customer support or a certified automotive technician for further assistance.
7. Specifications
| Product Name | Kufatec LED USA to LED EU Facelift Adapter |
| Model Number | 21607683 |
| Brand | Kufatec |
| Manufacturer | TFS |
| Compatibility | Audi A5 / S5 8T (for conversion from USA LED to EU Facelift LED taillights) |
| Product Type | Wiring Adapter Kit |
| Installation Position | Rear (for taillights) |
| Material | Plastic (for connectors and insulation) |
| ASIN | B07RRT9W26 |
8. Warranty and Support
8.1. Warranty Information
Specific warranty terms for the Kufatec LED USA to LED EU Facelift Adapter are provided by the manufacturer, Kufatec, or the authorized reseller at the time of purchase. Please retain your proof of purchase for warranty claims.
For detailed warranty information, including coverage period and conditions, please refer to the documentation included with your product or visit the official Kufatec website.
8.2. Customer Support
For technical assistance, installation queries, or troubleshooting beyond the scope of this manual, please contact:
- The authorized Kufatec dealer or reseller from whom you purchased the product.
- Kufatec's official customer support channels (refer to their website for contact details).
When contacting support, please have your product model number (21607683) and purchase details readily available.





