Audi B8.5 8K LED Bi-Xenon Headlight Assembly - Used Original Parts

Diagnosis and Common Symptoms

As a master technician, I frequently see the B8.5 chassis enter the bay with localized lighting malfunctions. The Audi 8K LED Bi-Xenon system is highly advanced but susceptible to specific environmental and electrical failures. The most common physical symptom is a yellowing or completely dead LED daytime running light (DRL) tube, usually caused by thermal degradation of the LED diode module. Additionally, compromised headlight seals can allow moisture ingress, directly shorting the lower-mounted xenon ballast and resulting in intermittent flickering or a dead low/high beam.

In the workshop, a diagnostic scan will typically reveal fault codes such as 02895 (Supply Voltage for LED Module - Open/Short to Ground), 00978/00979 (Left/Right Low Beam Headlamp fault), or 01539 (Headlights Not Adjusted). On the dashboard, the driver will be greeted with a DIS warning stating "Main beam headlight faulty" or "Adaptive light defective." Replacing the compromised assembly is the only definitive way to restore factory illumination and clear the CAN-bus communication errors.

Introduction

When repairing complex German lighting networks, aftermarket alternatives consistently fail to deliver the precise beam pattern, thermal management, and module compatibility of factory units. This is a Genuine Used Audi assembly that has been carefully removed from a donor vehicle and subjected to rigorous bench testing. We meticulously verify the xenon projector cutoff, the continuity of the LED DRL strip, and internal wiring integrity to ensure it is fully operational. Investing in a tested, Genuine component guarantees exact physical fitment and flawless integration with your vehicle's onboard electrical system.

Product Details

• Brand: Audi
• Model Compatibility: Audi A4 / S4 (B8.5 Facelift Chassis 8K)
• Part Name: LED Bi-Xenon Headlight Assembly
• Condition: Genuine Used (Tested Working)
• Notes: Control modules, xenon bulbs, and ballasts are generally transferred from your original unit unless otherwise specified. A basic settings alignment via VCDS or ODIS is highly recommended post-installation.