Audi A3 8P Door Loom Harness Wiring Passenger Rear Left N/S 8P4971687S

The Audi A3 8P Rear Left Door Wiring Harness Assembly is an original electrical component designed for the rear left door of the Audi A3 8P generation. Designed as a factory installation, the harness ensures proper connection of all receivers and sensors in the door to the vehicle's main wiring.

Specifications and technical data

• SKU: 8P4971687S
• Mark: Audi
• Condition: Used
• OEM Part Number: 8P4971687S
• Substitutable numbers: 8P4971687S, 8P4 971 687 S, 8P4 971 687 T, 8P4971687T
• Location on the vehicle: Rear, Left
• Category: Other Starters, Alternators, ECUs & Wiring

Purpose and Function of the Rear Left Door Harness

The presented Audi A3 8P rear left door wiring harness is responsible for a stable electrical connection between the modules located in the door and the body's wiring. It covers power and signal circuits for elements such as actuators, window controls, lighting, or any sensors, depending on the specific car configuration.

Thanks to its factory design, the correct wire routing geometry is maintained, which reduces the risk of chafing, short circuits, and problems with door hardware operation. The harness is prepared for installation in a specific location on the body, which facilitates servicing and reduces repair time.

Construction and Fit for Audi A3 8P

This wiring harness has been developed specifically for the Audi A3 8P platform, taking into account door dimensions, mounting points, and grommets between the door and the pillar. This means that:

• connectors are factory-matched to the modules and components installed in the rear left door,
• wire lengths correspond to the original routing path,
• mounting points and brackets are consistent with the door and body construction.

Such a precise fit allows for maintaining the factory standard of electrical installation, which is important for both reliability and subsequent diagnostics in the workshop.

Benefits of Using an Original Used Harness

Choosing an original Audi wiring harness from the used electrical parts category is a technically and economically advantageous solution. Compared to aftermarket parts or makeshift repairs (soldering, extending, fabricating parts of the harness), you get:

• preservation of the original circuit structure – correct wire gauges and shielding where intended by the manufacturer,
• secure plug connections – connectors compatible with original control modules and door hardware,
• easier diagnostics – wiring diagrams match the actual harness layout, which simplifies the work for automotive electricians.

A used harness allows for restoring the functionality of the door's electrical system without the need to interfere with the vehicle's main wiring, which is particularly important in cases of faults resulting from mechanical damage to wires in the grommet or inside the door.

Professional Installation and Practical Application

Due to its location in the rear left part of the body, the harness is exposed to repeated bending around the grommet between the door and the body. Replacement with a functional part restores:

• stable power supply to receivers in the door,
• correct communication with vehicle control modules,
• proper functioning of comfort features related to the rear left door.

Installation by a workshop specializing in automotive electrics is recommended, as it ensures proper wire routing, correct connector latching, and seal integrity of the grommets.

Other Parts and Technical Knowledge for Audi Users

If you are looking for other parts in the Other category for this brand, check out our offer at Other Audi, where you will find a wide selection of installation components and equipment for various models.

For those interested in a broader technical context of this brand's models, including differences in the construction of powertrains and chassis, we recommend the blog article Audi RS vs. Other Models – What's Under the Hood and Chassis?, which helps to better understand Audi's design philosophy and the selection of appropriate replacement parts.