Audi S3 8Y Rear Tailgate Light Lamp Wiring Loom Harness Left N/S 8Y0945307

Audi S3 8Y Rear Tailgate Light Lamp Wiring Loom Harness Left N/S is an original lighting system component designed to support the tailgate lamp on the driver's side. It ensures a stable electrical connection between the rear lamp and the vehicle's wiring, resulting in the proper operation of position and brake lights. This is a practical service solution for users looking to restore full functionality to the rear lighting of their Audi.

Specifications and technical data

• SKU: 8Y0945307-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 8Y0945307
• Substitutable numbers: 8Y0945307, 8Y0 945 307, 00213521
• Location on the vehicle: Rear, Left
• Category: Rear Light Assemblies

Purpose and vehicle placement

The presented wiring harness is a component of the Rear lights and brake lights system and is designed for installation in the rear of the vehicle, on the left side. It is responsible for power supply and control signals for the lamp located in the tailgate, which is important for both safety and compliance with road traffic regulations.

Thanks to its precise fit for the specific Audi S3 8Y generation, the harness allows for maintaining the factory cable routing and proper installation within the tailgate, without the need for modifications or custom connections.

Construction and technical function

The harness consists of a set of wires and connectors prepared to work with the tailgate rear lamp. The design provides the appropriate number of signal paths for lighting functions, such as position light, brake light, or auxiliary lighting, in accordance with the configuration used in the Audi S3 8Y.

Key functional features:

• factory connectors matched to the rear tailgate lamp,
• appropriate cable length allowing for proper routing in the tailgate hinge,
• preservation of the original vehicle electrical system architecture.

This solution reduces the risk of installation errors, circuit resistance issues, or error messages regarding faulty bulbs/LEDs in the vehicle's diagnostic system.

Benefits of using an original Audi wiring harness

Using an original harness dedicated to the Audi S3 8Y allows for maintaining the consistency of the electrical system with the manufacturer's design. This is particularly important in modern cars, where the lighting system interacts with control, diagnostic, and driver assistance systems.

The most important advantages include:

• reliable electrical connections thanks to factory connectors and properly selected wire cross-sections,
• reduced risk of failures resulting from soldered or custom-made connections,
• easier diagnostics in the future – the installation remains consistent with Audi service diagrams.

Service application and installation

The harness is suitable for repairs following a rear-end collision, replacing a damaged tailgate lamp, or addressing intermittent lighting issues on the left side. Due to the preservation of the original cable geometry, the installation is orderly, and the component can be clipped into existing tailgate holders and grommets.

Installation by a person with experience in vehicle electrical systems is recommended to ensure proper routing of the harness and to avoid excessive tension at the tailgate hinge point.

Expanding the Audi lighting system

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 tail lamp assemblies, power cables, or additional tailgate harnesses, check out the available parts in the Audi rear lights and brake lights category.

For drivers interested in broader drivetrain upgrades and matching vehicle characteristics to their driving style, the guide article Dismantled drive axles and differentials – how to choose gear ratios for your driving style may be helpful, as it discusses practical aspects of selecting used and refurbished components.