Audi A4 B9 S4 8W LED Rear Tail Light Lamp Cable Wire Left N/S 8W5945093AC

Audi A4 B9 S4 8W LED Rear Tail Light Lamp Cable Wire Left N/S is an original electrical installation component designed to support the rear lighting on the driver's side. Thanks to its factory-spec design, it ensures a stable electrical connection between the lamp and the vehicle's wiring system, which translates into proper light operation and road safety. It is a practical solution for users who want to restore full lighting functionality after body repairs or lamp replacement.

Specifications and technical data

• SKU: 8W5945093AC-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 8W5945093AC
• Substitutable numbers: 8W5945093AC, 8W5 945 093 AC, 8W5945093AA, 8W5 945 093 AA
• Location on the vehicle: Rear, Left
• Category: Other Starters, Alternators, ECUs & Wiring

Purpose and function of the rear lamp cable

The presented wiring harness is dedicated to the rear left part of the vehicle body, where it is responsible for powering and controlling the lamp. It includes wires that carry signals to individual lighting functions, such as position lights, brake lights, or turn signals, in accordance with the configuration used in a given Audi A4 B9 or S4 8W model. Using an original wiring harness allows you to maintain compliance with the factory electrical diagram and minimizes the risk of installation errors.

Benefits of using an original Audi wiring harness

Choosing an original rear lamp cable means perfectly matched connectors, the correct wire length, and proper routing of the wires relative to the mounting points on the body. This facilitates installation and limits the need for modifications to the electrical system. For workshops and users, this means:

• a secure connection with factory lamp and vehicle installation connectors,
• reduced risk of faults resulting from improper soldering or makeshift wiring,
• maintaining the correct operation of the vehicle's control systems,
• consistency with Audi service documentation.

As a result, the cable can be used both for standard replacement of a damaged harness and for post-accident repairs, where restoring full lighting functionality is crucial.

Vehicle placement and installation aspects

The component is intended for installation in the rear left part of the vehicle, in the area of the tail light assembly. Such placement requires routing the wires in accordance with factory clips and grommets to avoid insulation chafing and lighting interference. In practice, the installation involves:

• removing the trunk upholstery or covers in the lamp area,
• disconnecting the old harness from the lamp connectors and the main installation,
• routing the new cable according to existing guides,
• checking the correct operation of all lighting functions after connection.

Using the correct harness for the rear left side helps avoid issues with wire length or mismatched connectors, which is particularly important in modern Audi models with complex body electronics.

Product characteristics and practical application

The offered cable belongs to the group of body electrical installation components responsible for the reliable operation of exterior lighting. In practice, it is used for:

• replacing a damaged harness after a collision or mechanical interference,
• resolving issues with intermittently failing rear lighting,
• restoring the factory installation after previous unprofessional modifications.

For owners of the Audi A4 B9 and S4 8W, this means the ability to use a component consistent with the manufacturer's solutions, which promotes stable operation of electrical systems and facilitates future diagnostics.

Technical support and additional information

Before purchasing, it is worth comparing the configuration of your rear lamp and installation with the offered cable to ensure that the component matches your specific equipment variant. If in doubt, comparing the shape of the connectors and the routing of the wires with the currently installed harness may be helpful.

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 additional wires, connectors, or lamp harnesses, check out the available parts in the Other Audi parts category.

For users interested in structural differences between sports versions and standard models, an article describing the construction of powertrains, braking systems, and chassis will be useful – details can be found in the material Audi RS vs other models – what is hidden under the hood and chassis?.

If you care about completing the repair efficiently and want to better understand how the availability of used OEM components affects vehicle downtime in the workshop, it is worth reading the guide on the impact of used OEM parts availability on repair time, which discusses the practical aspects of selecting such components.