Genuine OEM Audi Rear Additional Stop Lamp, part number 8J0945097. This lamp provides an extra brake light, significantly increasing visibility for following drivers and enhancing overall road safety. It is typically mounted in the rear of the vehicle, often in the spoiler or rear window area. The lamp features a red lens and measures approximately 0.45 meters in length. Using a genuine OEM stop lamp ensures correct light output, beam pattern, and ECE/DOT compliance, which is crucial for legal operation and effective signaling.