Audi A4 B8 Door Harness Loom Cable Wiring Rear Left Right N/O/S 8K0971687B

Audi A4 B8 Left Right Rear Door Wiring Harness is an original part from the Wires, Harnesses, and Connectors category, designed to service the electrical system in the rear left and right doors. This used, factory wiring harness ensures proper signal and power routing to door components, maintaining compatibility with the original Audi electrical architecture.

Specifications and technical data

• SKU: 8K0971687B
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K0971687B
• Substitutable numbers: 8K0971687B, 8K0 971 687 B, 8K0971687A, 8K0 971 687 A
• Location on the vehicle: Rear, Right, Left
• Part type: Wire Harness
• Category: Wiring Harnesses, Cables & Connectors

Vehicle Application and Placement

The presented wiring harness is intended for installation in the rear left and right doors of the Audi A4 B8 generation. Its placement covers the area from the grommet between the pillar and the door to the connectors for individual consumers within the door, such as control modules, actuators, or window and lock control elements.

Thanks to precise fitting for the specific body model, the harness allows for correct wire routing, minimizes the risk of insulation abrasion, and facilitates servicing and diagnostics of the rear door electrical system.

Construction and Electrical Compatibility

The harness is designed as an OEM component, featuring a complete set of connectors and wires adapted for the factory Audi installation. It includes:

• factory connectors matched to the modules and accessories in the rear doors,
• wires with appropriate cross-sections selected for current loads,
• insulation suitable for operation within the door space, exposed to movement, moisture, and temperature changes,
• factory mounting and routing points, facilitating correct placement within the door.

This solution ensures stable electrical connections, reduces voltage drops, and minimizes the risk of interference in the operation of electronically controlled components.

Benefits of Using an Original Audi Harness

Using an original wiring harness in the Audi A4 B8 offers a range of practical benefits for everyday operation:

• Full Compatibility with Vehicle's Electrical System – the harness is prepared to work with factory modules and controllers, without the need for modifications.
• Reduced Door Electrical Issues – correctly selected wires and connectors minimize the risk of malfunctions such as unresponsive windows, central locking, or lighting.
• Easier Service Installation – a ready-made harness with factory mounting points reduces work time and the possibility of errors during connection.
• Consistency with Audi service documentation, simplifying diagnostics using factory wiring diagrams.

Condition and Service Purpose

This part is a used item, intended as a replacement part in case of damage to the factory rear door wiring, e.g., after a collision, interior trim work, or prolonged use. Choosing a used, original harness is a cost-effective solution while maintaining the factory electrical specification and proper fit for the vehicle.

Audi Wires, Harnesses, and Connectors – Selecting the Right Components

If you need other components from the Wires, Harnesses, and Connectors category dedicated to this brand, check the Audi Wires, Harnesses, and Connectors available in our store to select compatible components for your model.

More About Selecting Used OEM Parts

Selecting used OEM components, especially in the area of electrical systems and engine accessories, requires knowledge of specifications and installation principles. If you are interested in a broader context of working with used original parts, their selection, and integration with existing installations, check out the article Go-Kart Feeling XXL: Used N18 Turbocharger vs. B48 – What to Choose for a Mini Cooper S?, which discusses practical aspects of selecting and installing used OEM components.