Audi A4 RS4 B8 Rear Tail Light Lamp Left N/S Outer Harness Plug Cable 8K9945095D

Audi A4 RS4 B8 Rear Tail Light Lamp Left N/S Outer Harness Plug Cable is a specialized electrical installation component designed to support the rear left outer lighting in the Audi A4 RS4 B8 model. Thanks to the factory connector geometry and properly selected wire cross-sections, it ensures a stable electrical connection and correct lamp operation under demanding operating conditions. This solution is dedicated to users who want to restore full lighting functionality without compromising on fitment.

Specifications and technical data

• SKU: 8K9945095D-2
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K9945095D
• Substitutable numbers: 8K9945095D, 8K9 945 095 D
• Location on the vehicle: Rear, Left
• Category: Rear Light Assemblies

Purpose and function in the lighting system

The presented wiring harness with a plug is a component of the Rear lights and brake lights category, responsible for transmitting electrical signals to the rear left outer lamp. Its placement on the vehicle in the driver-side rear area allows for precise routing of power and control signals to all lamp circuits, such as the position light, brake light, or turn signal, in accordance with the configuration used in a given Audi A4 RS4 B8 unit.

A properly designed harness minimizes the risk of voltage drops, interference, and contact overheating, which translates into reliable operation of the lighting system and correct interaction with the vehicle's electronics.

Construction, fitment, and installation

The plug with the wiring harness has been developed for direct application in the Audi electrical system, without the need for modifications or connector adaptations. The use of original contact geometry and proper wire routing allows for plug-and-play style installation, maintaining the factory wiring path within the rear body section.

The component is designed to work in an area exposed to temperature changes, moisture, and vibrations, which is why the connector construction and wire insulation have been selected to ensure adequate connection durability under typical car operating conditions. A correctly installed harness reduces the risk of loose contacts, lamp flickering, or intermittent power supply interruptions.

Service application in the Audi A4 RS4 B8

The wiring harness plug for the rear left outer lamp is particularly useful in situations where the factory installation has been damaged – for example, as a result of a rear-end collision, contact corrosion, lamp socket overheating, or improper previous repairs. Using a dedicated component allows you to restore correct lighting operation without having to build the installation from scratch.

This solution is beneficial both for workshops specializing in the Audi brand and for conscious users who want to maintain consistency of the electrical installation with the manufacturer's factory standards. Proper fitment to the rear left outer lamp reduces diagnostic and installation time, as well as minimizes the risk of connection errors.

Product characteristics and condition

The offered wiring harness with a plug comes from the Audi brand and is a component from the group of original solutions used in this model. The product is in used condition, which means it was previously operated in a vehicle but is still suitable for further use after proper verification and installation. For many users, this represents a favorable compromise between repair costs and maintaining proper fitment for a specific version of the Audi A4 RS4 B8.

Compared to universal replacements, using a dedicated harness allows you to maintain compliance with the factory electrical architecture, which is especially important in vehicles equipped with extensive light control systems and onboard diagnostics.

Lighting system expansion and additional information

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 combination lamps, control modules, or additional harnesses, check the available parts in the Audi rear lights and brake lights category.

If you are considering a wider upgrade of your car and want to better understand how to effectively use used components in the Audi brand – both in repairs and tuning – it is worth reading the article Audi on second-hand parts – tuning and repairs without losing quality, which discusses a practical approach to selecting components from the secondary market.