Audi A4 B9 Rear Tail Light Lamp Outer Wire Connector Plug Left N/S 8W5945069A

Audi A4 B9 Rear Tail Light Lamp Outer Wire Connector Plug Left N/S is an original electrical installation component designed to support the rear left outer lighting in the Audi A4 B9 generation. Thanks to the factory-spec connector geometry and properly selected wiring harness, it ensures a stable electrical connection and correct lamp operation. This is a practical solution for post-collision repairs, lamp replacement, or damage to the factory installation.

Specifications and technical data

• SKU: 8W5945069A-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 8W5945069A
• Substitutable numbers: 8W5945069A, 8W5 945 069 A
• Location on the vehicle: Rear, Left
• Category: Other Starters, Alternators, ECUs & Wiring

Purpose and function in the lighting system

The presented connector with wiring harness is dedicated for installation in the rear left part of the Audi A4 B9 body, where it is responsible for supplying power and control signals to the outer tail light. A correctly selected layout of wires and plugs minimizes the risk of voltage drops, light flickering, or errors in the lighting control systems.

This component is particularly useful in situations involving:

• damage to the factory harness as a result of a collision or bodywork,
• broken wires due to long-term use,
• contact issues in the lamp connector (burn marks, contact corrosion).

Benefits of using an original Audi wiring harness

Using an original connector with a wiring harness in the Audi A4 B9 allows you to maintain the factory wire routing logic and compatibility with the vehicle's installation. As a result:

• you limit the need for modifications and soldering in the main body harness,
• you maintain compliance with factory electrical diagrams,
• you reduce the risk of errors appearing in diagnostic systems.

This is particularly important in modern vehicles, where the lighting system interacts with control modules and safety systems. The factory connector with wiring harness also facilitates subsequent diagnostics, as the installation remains clear for service centers working based on manufacturer documentation.

Installation in the rear left part of the vehicle

The placement on the vehicle in the rear left body zone means that the harness has been designed taking into account the wire length and routing geometry typical for this side of the car. This facilitates fitting to existing grommets, brackets, and mounts, which translates into:

• an orderly installation path behind the trunk upholstery,
• reduced risk of wire abrasion against body elements,
• maintaining the appropriate wire bending radius near the lamp.

With proper installation, the harness should not interfere with trunk equipment or moving body parts, which promotes long-term, trouble-free operation.

Application in service and post-collision repairs

This type of connector with a wiring harness is particularly useful in workshops dealing with Audi post-collision repairs, where damage to the installation near the tail lights often occurs. Using a ready-made section of the harness allows for shorter repair times and limits the number of soldered connections, which is beneficial both electrically and mechanically.

In practice, this means:

• easier restoration of the factory installation path after replacing the lamp or body panels,
• lower risk of leaks and moisture ingress into connections,
• more predictable lighting system behavior in the long term.

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 harnesses, connectors, or adapters, check the available parts in the Other Audi category.

Technical support and knowledge about Audi models

When selecting installation components for the Audi A4 B9, it is worth knowing the differences between individual equipment versions and engine variants, as they may affect the electrical system configuration. For those who want to better understand the specifics of technical solutions used by this brand – from powertrains to auxiliary systems – the article Audi RS vs other models – what is hidden under the hood and chassis? will be helpful, as it discusses key structural differences and the manufacturer's approach to component design.