Audi A4 B9 S4 8W Rear Tail Light LED Right O/S Wire Cable Harness 8W5945094AA

Audi A4 B9 S4 8W Rear Tail Light LED Right O/S Wire Cable Harness is an original lighting component designed for the rear right side of the vehicle body, specifically engineered for the A4 B9 and S4 8W generation models. Thanks to LED technology, it ensures a consistent look with factory lighting and precise fitment to the vehicle's electrical system, which facilitates maintenance and the replacement of a damaged module.

Specifications and technical data

• SKU: 8W5945094AA-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 8W5945094AA
• Substitutable numbers: 8W5945094AA, 8W5 945 094 AA
• Location on the vehicle: Rear, Right
• Category: Other Starters, Alternators, ECUs & Wiring

Purpose and function in the vehicle

The described LED tail light is intended for installation in the rear right section of the vehicle body, where it is responsible for the vehicle's signaling to other road users. The integrated wire harness allows for organized cable routing and a stable connection to the factory connector, which reduces the risk of installation errors and electrical system communication issues.

The LED solution used in this lamp model provides:

• uniform, clear light with constant parameters,
• fast response to control system signals,
• increased durability of light sources compared to traditional bulbs.

Construction and fitment for Audi A4 B9 / S4 8W

The lamp has been constructed as a component consistent with the factory styling of the Audi A4 B9 and S4 8W body, allowing it to maintain the original light line and the characteristic layout of the LED segments. The shape of the housing and the placement of mounting points are adapted to the rear right corner of the vehicle, which enables installation in place of a damaged component without the need for bodywork modifications or interference with the chassis.

The wire harness included with the lamp allows for proper connection to the vehicle's electrical system, maintaining the correct signal sequence and connection stability. Such a solution helps maintain the full functionality of lighting control systems and communication with body control modules.

Performance parameters and service application

Due to its location in the rear right part of the vehicle, the lamp operates in an area exposed to external factors such as moisture, dirt, or temperature changes. The housing design and the use of LED technology promote stable operation under typical operating conditions, and the original origin of the component facilitates integration with the existing electrical system.

In service practice, this type of lamp is primarily used in situations involving:

• mechanical damage to the rear corner of the body,
• failure of LED segments or problems with the wire harness,
• the need to restore full lighting functionality after a collision.

Component condition and installation aspects

The offered lamp belongs to the group of used parts, which means it comes from disassembly and is intended for reinstallation in a vehicle after prior verification of its technical condition. This type of solution is often chosen by professional workshops and users who want to maintain the original lighting specification while optimizing repair costs.

Placement on the vehicle in the rear right part of the body requires maintaining the correct disassembly sequence of the trim and access to the electrical installation. To avoid installation errors, it is recommended that the replacement be performed by persons with experience in working with LED lighting systems in Audi vehicles.

Configuration expansion and related content

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 lamps, wire harnesses, or control modules, check the available parts in the Other Audi category.

For users interested in the differences in construction and equipment of the brand's sports versions, including solutions used in powertrains and chassis, the article Audi RS vs other models – what is hidden under the hood and chassis? may be helpful, as it discusses the key features of the RS series against standard models.

If you want to deepen your knowledge on the selection and replacement of lighting components in vehicles, including LED headlights and related solutions, it is worth reading the guide See more and better – a complete guide to selecting and replacing used LED and Xenon headlights, which describes the practical aspects of working with original OEM components.