What is a Citroën C4 VTS I airbag control unit?
The Citroën C4 VTS I airbag control unit is the central safety unit in your vehicle, which precisely activates all occupant restraint systems, such as airbags and seatbelt pretensioners, after an accident. It continuously monitors all connected sensors, stores important crash data, and ensures the proper functioning of the entire airbag system for your safety.
This control unit (ECU) is crucial for the safety of vehicle occupants.
It processes signals from crash sensors and triggers the necessary safety measures within milliseconds.
Why is the Citroën C4 VTS I airbag control unit defective?
A Citroën C4 VTS I airbag control unit often fails after a collision because it irreversibly stores crash data, which permanently activates the airbag warning light. In addition, electrical problems such as low voltage or short circuits, as well as moisture ingress or age-related material fatigue, can lead to failure of the internal electronics.
After an accident, crash data is often stored in the control unit, which prevents further use without a special reset.
Common causes of failure include internal errors in the electronics or communication problems with other vehicle systems.
The power supply to the module can also be affected by defective batteries or alternators, leading to malfunctions.
Common error codes for Citroën C4 VTS I airbag control unit repair
During Citroën C4 VTS I airbag control unit repairs, specific error codes may occur that indicate internal control unit problems or stored crash data, rather than external sensor errors. These codes often prevent the error log from being erased and require a specialized repair or crash data reset to restore full functionality.
- B1000 → Control unit communication error → Internal fault of the airbag ECU
- B1210 → Stored crash data → Accident event stored in memory, must be deleted
- B1233 → EEPROM error in the control unit → Problem with the internal, non-volatile memory
- B1277 → Self-test in the control unit failed → Internal diagnosis of the ECU reports defect
- B1400 → Voltage switch error → Problem with the internal voltage supply of the control unit
- B1600 → Undervoltage in the airbag control unit → Insufficient power supply to the ECU
- B1622 → Error deleting crash data → Crash data cannot be removed properly
What part numbers are available for the Citroën C4 VTS I airbag control unit repair?
For Citroën C4 VTS I airbag control unit repairs, there are specific OEM part numbers that ensure exact compatibility with your vehicle model. These numbers are crucial for identifying and repairing or replacing the correct control unit to restore the safety features of your Citroën C4.
Correct identification of the part number is essential for a successful repair, as not all control units are compatible with each other.
The following OEM part numbers are verified for various variants of the Citroën C4 I (approx. 2004-2008) and prove the exact fit for airbag control units.
- 603725800 → Citroën Original Airbag Control Unit → C4 I 1.4 Petrol (2004-2008)
- 9658137980 → Citroën Original Airbag Control Unit → C4 I 1.4 Petrol (2004-2008)
- 9662643680 → Citroën Original Airbag Control Unit → C4 Coupé Diesel (2006, Engine 9HX)
- 609725800 → Citroën Original Airbag Control Unit → C4 Diesel (2006)
- 9662643980 → Citroën Original Airbag Control Unit → C4 I (LC) 1.6 HDi (2004-2011)
- 9807547380 → Citroën Original Airbag Control Unit → C4 (incl. VTS models)
Advantages of Citroën C4 VTS I airbag control unit repair
Repairing your Citroën C4 VTS I airbag control unit offers significant advantages over purchasing a new one, including significant cost savings and sustainability, as you have a defective component repaired. A professional repair service can securely erase stored crash data and restore the airbag system's full functionality, thereby extinguishing the safety-relevant warning light.
A repaired control unit is often just as reliable as a new part, but much cheaper.
Repair contributes to the conservation of resources and is an environmentally friendly alternative to replacement.
After the repair, your airbag system will be fully functional again and the airbag warning light will go out, which is also important for the vehicle inspection.