Audi A4 B9 Rear Bootlid Inner Tail Light Lamp Left Right N/O/S 8W9947409

Audi A4 B9 Rear Bootlid Inner Tail Light Lamp Left Right N/O/S is an original lighting component designed for the rear of the vehicle, ensuring uniform illumination of the cargo area. Thanks to its factory design for the Audi brand, it maintains full compatibility with the electrical system and the interior styling of the trunk. It is a practical solution for users who want to restore functional lighting or replace a missing module after bodywork repairs.

Specifications and technical data

• SKU: 8W9947409
• Mark: Audi
• Condition: Used
• OEM Part Number: 8W9947409
• Substitutable numbers: 8W9947409, 8W9 947 409
• Location on the vehicle: Rear, Left
• Category: Rear Light Assemblies

Purpose and function in the vehicle

The presented trunk light is a component of the vehicle's rear lighting system, functionally linked to the Rear lights and brake lights group. Its placement in the rear of the car, on the left side, allows for effective illumination of the cargo space during loading and unloading, especially after dark or in poorly lit areas.

The element has been designed specifically for the Audi A4 B9 generation model, which translates into:

• proper fitment to the factory mounting hole in the trunk,
• visual consistency with other interior trim elements,
• stable mounting and a secure connection to the electrical system.

Construction and functional properties

The trunk light in the Audi A4 B9 is constructed as a compact lighting module that integrates the light source and the electrical connector into a single housing. This keeps installation and removal to a minimum and makes maintenance convenient.

Key functional features include:

• directed illumination of the cargo area, improving the visibility of transported items,
• factory fitment to the Audi system, which reduces the risk of installation errors,
• preservation of the vehicle's original interior appearance after replacing a damaged component.

By using an original lighting module, you can maintain the technical and aesthetic consistency of the entire rear lighting system of the vehicle.

Condition of the component and service application

The offered trunk light is a used component, which makes it an attractive cost-effective alternative to a new part while maintaining the manufacturer's original specifications. This type of component is particularly useful in situations where replacement is necessary due to mechanical damage, trunk flooding, or interference with the electrical system.

In workshop practice, the light can be used both as a spare part for standard repairs and when completing missing elements after body and paint repairs of the rear body section. Using an original module helps reduce the risk of compatibility issues that often arise with low-quality replacements.

Benefits of using an original trunk light

Choosing an original trunk light for the Audi A4 B9 brings a number of practical benefits:

• Factory fitment – no need for modifications to the installation or mounts, installation in accordance with the manufacturer's solutions.
• Consistency with the vehicle's rear lighting system – maintaining a uniform color and light characteristics within the rear of the car.
• Seamless integration with vehicle electronics – minimizing the risk of errors in lighting monitoring systems.

This approach is particularly important in modern vehicles, where the lighting system works with advanced onboard electronics and diagnostic systems.

Related Audi lighting components

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 rear light modules, combination lamps, or additional trunk lights, check the available parts in the Audi rear lights and brake lights category.

For users interested in a broader approach to the operation and maintenance of modern car systems, including elements affecting exhaust emissions and engine efficiency, an article describing the operation of the exhaust gas recirculation system may be helpful – more information can be found in the material EGR: what it is and why it is worth considering used EGR valves.