Audi A4 B8 SRS Air Module Control Unit ECU 8K0959655Q

Audi A4 B8 SRS Air Module Control Unit ECU is a factory-fitted module from the Electronic control modules and controllers group, designed to manage the vehicle's SRS safety system. It is responsible for analyzing signals from crash sensors and initiating the deployment of airbags and seatbelt tensioners, ensuring the consistent operation of the entire system. Using this OEM component allows for a technically correct repair of the safety system without the need to resort to aftermarket replacements of unknown origin.

Specifications and technical data

• SKU: 8K0959655Q
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K0959655Q
• Substitutable numbers: 8K0959655Q, 8K0 959 655 Q
• Category: ECUs & Computer Modules

Function and role of the SRS controller in the Audi A4 B8

The SRS ECU module in an Audi is responsible for the central control of the airbag system and seatbelt tensioners. Based on signals from acceleration sensors, crash sensors, and information from other vehicle control units, it decides on the activation of the appropriate safety system components. A correctly selected and functional controller is crucial for maintaining the manufacturer's intended airbag deployment logic, which has a direct impact on the safety of the driver and passengers.

Benefits of using an original ECU module

Using an original SRS controller in an Audi A4 B8 ensures:

• preservation of the factory operating logic of the airbag and seatbelt tensioner system,
• compatibility with other control units in the vehicle (e.g., CAN bus, equipment configuration),
• the possibility of proper diagnostics using factory service software,
• easier adaptation and coding after post-accident repairs.

Thanks to this, the original module from the Electronic control modules and controllers group is the preferred solution for both professional service centers and workshops specializing in automotive electronics.

Selection, compatibility, and installation aspects

When selecting an SRS controller for an Audi A4 B8, it is crucial to match it to the specific vehicle configuration (number of airbags, curtain airbags, tensioners, additional safety systems). In practice, this means verifying compatibility based on manufacturer part numbers, equipment versions, and the vehicle's model year. A used module allows for an economical repair, provided it is correctly selected and adaptation procedures are performed.

After installation, the following is usually required:

• clearing stored errors in the controller's memory,
• checking communication within the vehicle network,
• verifying the correctness of the equipment configuration in the diagnostic system.

This approach minimizes the risk of SRS system malfunction and allows for the restoration of the full functionality of the safety system.

Used condition and practical operational tips

A component in used condition is a solution often chosen for post-accident repairs and for resolving faults related to SRS controller errors. Before installation, it is recommended to perform a visual inspection of the connectors and the housing, followed by full diagnostics after installation in the vehicle. A correctly selected and tested module allows for the restoration of the safety system's functionality while maintaining reasonable service costs.

More about used electronics and related products

If you want to better understand how to safely choose used controllers and sensors, what to look for when selecting by part numbers, and what the coding and adaptation process looks like, check out our guide: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?. The article explains step-by-step the issues of compatibility, selection by VIN/OEM, and typical installation procedures.

If you are planning a comprehensive repair or upgrade of the safety electronics in your Audi and need other components from the same group, such as comfort system controllers, body modules, or engine control units, check out the available parts in the Electronic control modules and controllers Audi category.