Audi A4 B9 Rear Aditional Third Brake Stop Lamp Light 8W5945097A

Audi A4 B9 Rear Aditional Third Brake Stop Lamp Light is an original lighting component designed for installation in the rear of the vehicle, responsible for clear braking signaling. Thanks to its factory design, it ensures consistency with the car's electrical system and stable mounting, which translates into safe and predictable brake system operation in terms of visibility. This is a practical solution for users who want to restore full functionality of the brake lighting in their Audi.

Specifications and technical data

• SKU: 8W5945097A
• Mark: Audi
• Condition: Used
• OEM Part Number: 8W5945097A
• Substitutable numbers: 8W5945097A, 8W5 945 097 A
• Location on the vehicle: Rear
• Category: Centre & Third Brake Light Assemblies

Function and role of the third brake light

The third brake light in the Audi A4 B9 performs an important informational function for vehicles behind, increasing the readability of the braking signal beyond the standard tail lamps. Positioned high in the rear of the body, it improves visibility in heavy traffic, while driving in the rain, or at night. The use of a dedicated, additional brake module allows for:

• better distinction of the braking signal against the position lights,
• increased safety during sudden deceleration,
• maintaining compliance with the factory Audi lighting configuration.

Construction and fitment for Audi A4 B9

The component has been designed specifically for the Audi A4 B9 generation model, which means precise fitment to the body and compatibility with factory mounting points. The main and central brake light in this configuration works with the original electrical harness, so installation does not require any wiring modifications or additional adapters. The design intended for operation in the rear zone of the vehicle ensures proper tightness and stability under typical operating conditions.

Condition, application, and benefits of replacement

The offered item is used, which allows for an economical replacement of a damaged or malfunctioning light while maintaining the manufacturer's original specifications. Replacing the third brake light is particularly recommended in case of:

• mechanical damage to the lens or housing,
• problems with uneven illumination or a complete lack of signal,
• the need to restore full functionality of the lighting system after a rear-end collision.

A well-chosen, original rear lighting component allows you to maintain a consistent vehicle appearance and preserve the lighting parameters intended by the manufacturer, which is important for both safety and regulatory compliance.

Professional installation and operation

Due to its location in the rear of the body, it is worth entrusting the installation of the third brake light to someone with experience in disassembling tailgate components or rear trim. Proper connection to the electrical system and correct sealing of the mounting area reduces the risk of moisture ingress and potential lighting interference. A properly functioning additional brake light increases the readability of signals sent to other road users and improves the comfort of daily vehicle operation.

If you are planning a comprehensive repair or upgrade of the rear lighting zone in your Audi and need other elements from the same group, such as light modules, additional lamps, or central brake lamps, check the available parts in the Audi main and central brake lights category.

For drivers interested in a broader look at the operation and refurbishment of automotive components, including the impact of key parts on engine performance, an article describing the renovation of a popular diesel engine may be helpful – more information can be found in the material The second life of the Mercedes OM642 engine – how injectors and a turbocharger restore the power of the 3.0 V6 CDI.