What is an Audi A6 4G Avant airbag control unit?
The Audi A6 4G Avant airbag control unit is the central safety unit in your vehicle, precisely activating all occupant restraint systems, such as airbags and belt tensioners, in the event of an accident. It continuously monitors all relevant sensors, stores important crash data, and ensures the proper functioning of all airbag modules.
This safety-relevant component is crucial for the protection of vehicle occupants.
It processes signals from crash sensors at the front, sides and rear in order to react quickly in an emergency.
Why is the Audi A6 4G Avant airbag control unit defective?
A defective Audi A6 4G Avant airbag control unit can be caused by internal electronic damage, overvoltage, or after an accident with stored crash data, making a professional Audi A6 4G Avant airbag control unit repair essential. A permanently illuminated airbag control unit indicator light often indicates an internal failure or a missing basic setting.
Common causes are age-related wear of electronic components or a short circuit in the ignition circuits.
Incorrect coding or software problems can also impair functionality, meaning the control unit is considered broken.
Common error codes for Audi A6 4G Avant airbag control unit repair
When an Audi A6 4G Avant airbag control unit repair is necessary, specific error codes will appear that directly indicate problems with the control unit and enable a precise diagnosis. These codes are crucial for identifying and correcting internal defects or communication problems.
- B1003 11 → Short circuit to ground → Ignition 2 Airbag passenger side (often virtual)
- B1008 00 → Short circuit to ground → Ignition belt tensioner rear passenger side
- B1009 11 → Short circuit to ground → Ignition belt tensioner rear driver's side
- B2010 00 → No or incorrect basic setting → Airbag control unit
These error codes require professional analysis using special diagnostic devices such as VCDS or VAS.
They indicate the need to check, repair or recode the control unit.
What part numbers are available for the Audi A6 4G Avant airbag control unit repair?
For Audi A6 4G Avant airbag control unit repair or replacement, two primary OEM part numbers are verified as genuine Audi/Bosch parts, ensuring correct compatibility and function. These are the most common serial numbers for the 4G (C7) model and are crucial for a proper repair in the workshop.
The first verified original part number is 4G0907637B, which has a Bosch OEM number of 0265020004.
The second confirmed part number is 4H0959655C, associated with the Bosch number 0285010856.
Both part numbers are specifically designed for the Audi A6 Avant 4G (C7) model series from 2011 to 2019.
Audi A6 4G Avant airbag control unit repair: installation and service
Due to the safety-critical nature of the component, the Audi A6 4G Avant airbag control unit repair requires professional execution, including careful removal and correct recoding after installation. Professional service providers erase crash data and restore full functionality to the system, often as a mail-in repair.
The control unit is usually located centrally in the vehicle, often under the seat or in the center console.
Before removing the battery, the ground cable of the vehicle battery must be disconnected to avoid unwanted activation.
After installation, vehicle-specific coding (e.g. standard coding 00106) using a diagnostic device is mandatory to rectify the failure.
Repair service providers often offer a two-year warranty on repaired devices that were defective.