Audi A4 B8 Rear Tail Light LED Wiring Harness Cable Plug Left N/S 8K5945095AC

Audi A4 B8 Rear Tail Light LED Wiring Harness Cable Plug Left N/S is an original electrical system component designed to support the driver-side LED tail light. Thanks to its factory-fit for the A4 B8 body, it ensures a stable electrical connection and proper operation of all lighting functions. It is a practical solution for post-collision repairs, lamp replacement, or damage to the factory wiring harness.

Specifications and technical data

• SKU: 8K5945095AC-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K5945095AC
• Substitutable numbers: 8K5945095AC, 8K5 945 095 AC
• Location on the vehicle: Rear, Left
• Part type: Wire Harness
• Category: Wiring Harnesses, Cables & Connectors

Purpose and vehicle placement

The presented wiring harness belongs to the Wires, harnesses, and connectors category and is dedicated to installation in the rear part of the vehicle, on the left side. It is responsible for power supply and transmitting control signals to the LED lamp, which is crucial for the correct operation of position lights, brake lights, turn signals, or license plate lighting (depending on the lamp configuration in a given vehicle).

Placement in the rear zone means that the harness operates in an area exposed to vibrations, temperature changes, and moisture, which is why using the correct, matched component is essential for the durability of the entire lighting system.

Design and technical function

The wiring harness was designed by Audi as an electrical system component dedicated to a specific type of LED tail light. It includes a set of wires and connectors enabling:

• transfer of power from the vehicle's main electrical system to the lamp,
• transmission of control signals from body modules,
• a stable, mechanically secured connection with the lamp and the vehicle's electrical system.

The factory design of the harness reduces the risk of installation errors typical of universal solutions or DIY-modified installations. Using an original component helps avoid communication issues within the vehicle's electrical network and potential errors in diagnostic systems.

Use in service and repairs

The left-side LED tail light wiring harness is particularly useful in situations where:

• mechanical damage or burnt wires have occurred as a result of a collision or corrosion,
• a lamp replacement is necessary and a reliable electrical connection is required,
• there are intermittent lighting failures, bulb errors, or problems with the lamp's communication with the vehicle's electronics.

Using an original harness allows for restoring proper lighting operation without the need to interfere with the vehicle's main electrical system, which is beneficial both technically and diagnostically.

Characteristics of the used product

The item is offered as a used part, meaning it has been removed from a vehicle but retains full functionality regarding its role in the electrical system. For many users, this is a reasonable compromise between repair costs and maintaining the manufacturer's original specifications. In the case of wiring harnesses, it is particularly important that the connectors and wire insulation are in a condition that allows for safe installation and operation.

Compatibility and part selection

To correctly select the harness for a specific Audi A4 B8, it is worth paying attention to the manufacturer's markings, the type of LED tail light used, and the placement on the vehicle. The product has assigned part numbers and interchangeable numbers, which facilitates verification of compliance with factory service documentation and Audi parts catalogs.

In case of doubt during selection, it is recommended to compare the shape of the connectors, the length of the harness, and the routing of the wires with the component factory-installed in the vehicle.

Expanding Audi electrical system upgrades

If you are planning a comprehensive repair or upgrade of the rear lighting zone in your Audi and need other components from the same group, such as additional harnesses, connectors, or wire sections, check the available parts in the Audi wires, harnesses, and connectors category.

For users interested in broader modifications of this brand's vehicles, including increasing performance and the conscious selection of used components, an article describing safe power upgrades in RS3 models may be helpful – see the guide regarding the 2.5 TFSI DAZA unit and purchasing used turbochargers.