Audi A4 S4 B8 Rear Lamp Right O/S Tail Light Bulb Holder Socket 8K9945258

Audi A4 S4 B8 Rear Lamp Right O/S Tail Light Bulb Holder Socket is a precisely engineered lighting component, dedicated to the rear right lamp in Audi vehicles. It ensures secure bulb seating, a stable connection to the electrical harness, and the maintenance of correct operating parameters for tail lights and brake lights. This is a practical service solution for post-collision repairs, replacing a damaged lamp, or refurbishing the lighting system.

Specifications and technical data

• SKU: 8K9945258
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K9945258
• Substitutable numbers: 8K9945258, 8K9 945 258
• Location on the vehicle: Rear, Right
• Category: Rear Light Assemblies

Purpose and function of the bulb holder

The presented socket is a component designed for installation in the rear right combination lamp, responsible for the mechanical stabilization of bulbs and their electrical connection to the vehicle's wiring. A correctly selected socket ensures:

• proper positioning of bulbs relative to the reflectors and lens,
• a secure electrical contact, reducing the risk of flickering or light failure,
• consistent operation of position lights, brake lights, and other lamp functions.

By maintaining the correct geometry and connectors, the socket works with the factory tail lamp, which facilitates service and reduces the time required to replace a damaged component.

Benefits of using an original Audi socket

Using a component from the same production line as the vehicle's factory equipment translates into high repeatability of mounting parameters. In practice, this means:

• precise fitment for the rear right lamp without the need for wiring modifications,
• maintenance of the correct contact layout and wire routing,
• reduction of the risk of lighting system errors and bulb failure warnings.

The used component allows for an economical repair of the lighting system while maintaining compliance with the vehicle's factory specifications.

Scope of application in the rear right lamp

The bulb holder operates in a demanding environment – it is exposed to temperature changes, vibrations, and moisture. A properly selected component helps maintain:

• stable electrical connections over a long service life,
• correct operation of brake and position lights in the rear right part of the vehicle,
• driving safety through clear signaling of maneuvers to other road users.

For workshops and users, this means efficient service handling and the possibility of quickly replacing a damaged socket without interfering with other lamp elements.

Condition of the component and mounting aspects

The offered socket comes from disassembly, which allows for combining cost-effective repair with the preservation of the original design. Before installation, it is recommended to perform a standard inspection of the contacts, working surfaces, and lamp seals to ensure long-term and stable operation of the lighting system.

Replacing the socket is a typical service operation, most often performed during:

• mechanical damage to the lamp or bulb housing,
• overheating of contacts and problems with bulb power supply,
• modernization or refurbishment of the tail lamp after body and paint repairs.

Expanding the Audi lighting system

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

To better plan your repair budget and consciously choose used components, it is also worth reading the analysis of service costs and component durability in the article Volkswagen 1.9 TDI vs 1.4 TSI – evolution of VW engines and repair costs, which shows how to optimally use parts from the secondary market.