Audi A4 B8 Rear Door Control Module Unit Left Right N/O/S 8T0959795N

Audi A4 B8 Rear Door Control Module Unit Left Right is a factory-original component from the Electronic control modules and controllers group, designed to operate the rear left and right door zones in Audi vehicles. It is responsible for precise control of electrical functions within the doors, ensuring consistent operation of comfort systems and communication with other vehicle systems. Thanks to its original design, the module allows for maintaining the correct logic of electronic operation without the need for installation modifications.

Specifications and technical data

• SKU: 8T0959795N
• Mark: Audi
• Condition: Used
• OEM Part Number: 8T0959795N
• Substitutable numbers: 8T0959795N, 8T0 959 795 N
• Location on the vehicle: Rear, Right, Left
• Category: ECUs & Computer Modules

Purpose and function of the Audi A4 B8 door module

The presented controller is dedicated to the rear part of the vehicle, with the possibility of installation on the left or right side. As a component of the comfort system, it is responsible for handling signals from switches and sensors in the doors and transmitting them to higher-level electronic units. Stable communication within the vehicle bus translates into the proper operation of functions such as window control, central locking, or interior lighting, in accordance with the configuration of a specific Audi unit.

Benefits of using an original control module

Using an original module from the Electronic control modules and controllers group allows for maintaining the factory operating parameters of the electrical system. In practice, this means:

• reliable fitment to the Audi electrical installation architecture,
• proper cooperation with existing harnesses and connectors,
• preservation of the logic of comfort functions in accordance with the vehicle software,
• reduction of the risk of communication errors in the controller network.

For workshops and users, this means easier diagnostics, predictable system behavior, and the ability to use standard manufacturer service procedures.

Installation characteristics and vehicle integration

The module is adapted for installation in the rear part of the body, on both the driver's and passenger's side. The factory design of the housing and connectors allows the controller to be seated in the designated place without mechanical or electrical modifications. Thanks to this:

• replacement time in service conditions is kept to a minimum,
• there is no need to adapt harnesses or use adapters,
• tightness and protection against external factors are maintained in accordance with the manufacturer's design.

After proper connection, the module may require standard configuration steps in accordance with Audi service procedures, which allows its operation to be matched to the specific equipment specification of the vehicle.

Component condition and service application

The offered controller comes from the secondary market and is intended for users and workshops that want to optimize repair costs while maintaining the original electronics architecture. Choosing such a solution is particularly beneficial for post-accident repairs, door installation damage, or problems with communication in the controller network, when it is necessary to replace a specific module instead of extensive interference with the entire harness.

Support in selecting used electronics

When selecting a door controller, it is crucial to match it to the vehicle configuration, so before purchasing, it is worth verifying compatibility based on manufacturer markings as well as hardware and software parameters. A detailed discussion of the principles of selecting used controllers and sensors, including the meaning of identification numbers, compatibility, and installation procedures, can be found in the Global Parts guide: Used automotive electronics – how to consciously choose modules and sensors second-hand.

If you are planning a comprehensive repair or modernization of the electric door control zone in your Audi and need other elements from the same group, such as comfort modules, window controllers, or central locking units, check the available parts in the Electronic control modules and controllers Audi category.