Audi A4 B8 Saloon Trunk Lid Tail Light Wiring Harness Rear Left N/S 8K5945093AA

Audi A4 B8 Saloon Trunk Lid Tail Light Wiring Harness Rear Left N/S is an original electrical installation component designed to support the rear lighting in the trunk lid on the left side. Thanks to its factory fit for the Audi A4 B8 saloon body structure, the harness ensures a stable electrical connection and proper operation of the tail lights and brake lights. It is a practical solution for users who want to restore full lighting functionality after body repairs or wire damage.

Specifications and technical data

• SKU: 8K5945093AA-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K5945093AA
• Substitutable numbers: 8K5945093AA, 8K5 945 093 AA
• Location on the vehicle: Rear, Left
• Part type: Interior Lighting
• Category: Rear Light Assemblies

Purpose and function in the lighting system

The presented wiring harness is responsible for power supply and control signals for the lamp located in the trunk lid on the left side of the vehicle. The component belongs to the Rear lights and brake lights group, which means it is involved in supporting key safety functions – position lights, brake lights, and any additional lamp functions, depending on the configuration of the specific Audi unit.

The vehicle placement specified as rear – left side allows for clear identification of the installation zone and facilitates part selection during lighting system repairs. This minimizes the risk of ordering errors and reduces vehicle downtime at the workshop.

Benefits of using an original Audi harness

The wiring harness dedicated to the Audi A4 B8 saloon provides:

• Factory fit to the geometry of the trunk lid and wire routing in the body.
• Appropriate length and connector arrangement, which facilitates installation without modifying the wiring.
• Consistency with the electrical parameters of the lighting system specified by the manufacturer.
• The ability to restore proper operation of the tail lights after mechanical damage or wire corrosion.

By using an original harness from the Rear lights and brake lights group, you maintain compliance with the factory Audi specification, which is important for both safety and subsequent technical inspections.

Installation characteristics and application

The placement specified as rear – left side means that the harness operates in an area particularly exposed to trunk lid movement, wire bending, and temperature changes. Replacing a worn or damaged wire with a component matched to the Audi A4 B8 saloon helps to limit typical problems, such as:

• intermittent lighting failures after opening or closing the trunk lid,
• lighting control system errors on the dashboard,
• overheating or oxidation of makeshift repair connections.

By using a dedicated harness, you restore the manufacturer-intended wire routing and relieve the connectors, which translates into more stable operation of the entire rear lighting system.

Component condition and service application

The offered harness comes from dismantling and is marked as a used original component, which represents a reasonable compromise between repair cost and maintaining factory build quality. This type of component is particularly useful in professional service centers and workshops specializing in the Audi brand, where quick availability and compatibility with the original installation are valued.

In workshop practice, using a complete harness instead of temporary repairs of individual wires allows for reducing the number of customer returns due to recurring faults in the same vehicle zone. It is a technically organized and predictable solution in terms of durability.

Expanding Audi lighting system repairs

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 tail light assemblies, control modules, or additional power cables, check the available parts in the Audi rear lights and brake lights category.

To better plan service work and reduce vehicle downtime at the workshop, it is worth learning practical tips regarding parts logistics and repair organization – you will find them in the article No more weeks of waiting – how a wide assortment in one warehouse really shortens your car's downtime at the mechanic?.