What is an Audi A6 4F Avant airbag control unit?
The Audi A6 4F Avant airbag control unit is your vehicle's central safety unit, instantly activating all occupant restraint systems, such as airbags and seatbelt pretensioners, in the event of a collision. It processes sensor data in real time, stores important crash information, and thus ensures the critical functionality of the entire safety system for driver and passengers.
This electronic control unit continuously monitors the vehicle's condition in order to trigger the safety systems as needed in an emergency.
It is essential for the correct functioning of all airbag modules and the storage of diagnostic data relevant for repair or troubleshooting.
Why is the Audi A6 4F Avant airbag control unit defective?
An Audi A6 4F Avant airbag control unit often fails because it stores irretrievable crash data after an accident, resulting in immediate system shutdown and the need for repair. Internal electronic errors, moisture damage, or communication problems in the vehicle's network can also cause a complete failure.
These defects often manifest themselves as a permanently illuminated airbag warning light in the instrument cluster.
A precise diagnosis in the workshop is crucial to find the exact cause of the problem and ensure a safe repair.
Common error codes for Audi A6 4F Avant airbag control unit repair
Common error codes on your Audi A6 4F Avant airbag control unit indicate communication problems, internal errors, or stored crash data. Immediate repair is often necessary to restore the airbag system's full functionality and ensure safety. These codes make professional diagnostics essential.
- B1000 → Control unit communication error → Cause: Problems in the data connection to the airbag ECU.
- U1100 → Missing communication with airbag control unit (component protection) → Cause: Activated component protection after replacement or coding problems.
- U1101 → Communication fault with airbag control unit (component protection) → Cause: Fault in data exchange, often associated with component protection release.
- 65535 → Crash data stored, not erasable (Airbag ECU internal error) → Cause: Stored impact data that requires special reset or repair.
What part numbers are available for the Audi A6 4F Avant airbag control unit repair?
For professional Audi A6 4F Avant airbag control unit repairs, matching the part number is essential, as various OEM numbers exist for this safety-critical component. These original manufacturer part numbers ensure exact compatibility with your vehicle model and its specific trim level.
The following original OEM part numbers are verified for airbag control units of the Audi A6 Avant Type 4F (C6, built approximately 2004–2011):
- 4F0 959 655 B
- 4F0 959 655 E
- 4F0 910 655 E
- 4F0 910 655 B
- 4F0 910 655 G
- 4F0 910 655 Q
- 4F0 910 655 QZ09
The compatibility of these modules extends across various engines and equipment variants of the Audi A6 4F Avant.
Please note that supplier numbers from Bosch or Continental are often internal and do not always directly match the Audi OEM numbers.