Audi A4 B9 Door Module Rear Right Left N/O/S Control Unit 8W0959595N

Audi A4 B9 Door Module Rear Right Left N/O/S Control Unit is a component from the Electronic control modules and controllers group, designed to operate the rear left and right door zones in Audi vehicles. This module allows for an economical yet technically sound repair of the door electrical system, maintaining the factory control logic and vehicle communication.

Specifications and technical data

• SKU: 8W0959595N
• Mark: Audi
• Condition: Used
• OEM Part Number: 8W0959595N
• Substitutable numbers: 8W0959595N, 8W0 959 595 N
• Location on the vehicle: Rear, Right, Left
• Category: ECUs & Computer Modules

Purpose and function of the door module

The presented module operates in the rear part of the vehicle, on the left or right side, and is responsible for controlling selected electrical functions in the doors. As an element integrated with the vehicle's installation, it works with the communication bus and master controllers, ensuring correct response to signals from switches and door sensors.

By maintaining the original electronics architecture, the module allows for the consistency of the comfort system, which is particularly important in modern Audi designs where many functions are supervised by a network of controllers.

Benefits of using an original Audi module

Using an original door module in an Audi A4 B9 allows for:

• maintaining compatibility with the factory electrical installation and vehicle software,
• preserving the operating logic of comfort systems as intended by the manufacturer,
• reducing the risk of communication errors between controllers,
• easier diagnostics using standard service tools.

This component is often chosen as a service solution in the event of door electronics failure, allowing for the restoration of full functionality at controlled repair costs.

Vehicle placement and installation aspects

The module is designed for installation in the rear part of the vehicle, on the right or left side, according to the door configuration of the specific unit. Information about the placement on the vehicle is crucial when selecting parts, so it is worth verifying compatibility with your body version and the side of the vehicle before installation.

In workshop practice, the module is installed in the location provided by the manufacturer, using factory connectors and mounts. This solution promotes stable system operation and facilitates any future diagnostics or replacement.

Using pre-owned electronics in Audi service

For components such as door modules, choosing pre-owned electronics is often economically justified while maintaining an appropriate level of safety and functionality. It is crucial to select a controller compatible with the specific vehicle version and verify its operation after installation using diagnostic tools.

If you want to better understand when it is worth reaching for pre-owned controllers and modules, check out our guide: The second life of electronics – when is it worth choosing pre-owned engine controllers, comfort modules, and parking sensors?

Expanding the control system in Audi

If you are planning a comprehensive repair or upgrade of the electric door control zone in your Audi and need other elements from the same group, such as additional controllers, body modules, or comfort management systems, check the available parts in the Audi electronic control modules and controllers category.