Audi A8 D4 Tail Light Cover Bulb Cap Trunk Boot Rear Left N/S Black 4H0945255

Audi A8 D4 Tail Light Cover Bulb Cap Trunk Boot Rear Left N/S Black is an original component designed for installation in the rear left section of the vehicle. It ensures stable bulb mounting and protects the interior of the lamp from contaminants within the trunk area, which translates into safe and predictable lighting performance. Thanks to its factory-fit design for Audi, installation is predictable and repeatable, with no modifications required.

Specifications and technical data

• SKU: 4H0945255
• Mark: Audi
• Condition: Used
• OEM Part Number: 4H0945255
• Substitutable numbers: 4H0945255, 4H0 945 255
• Location on the vehicle: Rear, Left
• Category: Headlight Assemblies

Purpose and function of the component

The presented bulb cover is dedicated to the rear left side of the vehicle, in the trunk lid area. It is responsible for properly sealing the bulb socket in the lamp, which:

• limits the ingress of dust and moisture into the housing,
• stabilizes the bulb's position in the socket,
• supports the maintenance of correct light distribution,
• reduces the risk of loose electrical contacts.

As a result, the rear lighting system remains more resistant to common operational issues, such as flickering or intermittent light failure.

Construction and fitment for Audi A8 D4

The cover has been designed specifically for the geometry of the rear lamp in the Audi A8 D4 model, taking into account the shape of the trunk cavity and the routing of the electrical harness. The design of the component allows for:

• secure seating in the lamp housing without additional adapters,
• compatibility with the factory bulb socket,
• easy removal when it is necessary to replace the light source.

The black color allows for visual consistency with other trunk trim elements while not affecting the light parameters of the lamp itself.

Condition, origin, and benefits of using a used part

The element comes from the group of original Audi components and is offered as a used part. This type of solution is often chosen for lighting service because it:

• ensures the maintenance of factory manufacturing standards,
• reduces the risk of fitment issues typical of aftermarket replacements,
• allows for an economical repair of the rear lighting system.

Using an original bulb cover promotes structural integrity of the lamp and minimizes the risk of leaks in the area where it connects to the trunk lid.

The importance of a proper bulb cover for safety

A functional bulb cover in the rear lamp has a direct impact on the reliability of the vehicle's signaling. A correctly selected component:

• limits corrosion of electrical contacts,
• reduces the risk of lamp fogging from the trunk side,
• supports the maintenance of consistent bulb illumination over a long period of operation.

Thanks to this, the driver maintains better vehicle visibility for other road users, which is particularly important when driving at night and in difficult weather conditions.

Expanding Audi lighting upgrades

If you are planning a comprehensive repair or upgrade of the lighting zone in your Audi and need other elements from the same group, such as lenses, modules, or additional mounting accessories, check out the available parts in the Audi Front Lights category.

For users of vehicles with diesel engines who are simultaneously diagnosing the operation of the power unit, an article discussing the symptoms and effects of problems with the injection system may be helpful – more information can be found in the material on diesel injector faults.