Citroën C3 Aircross I airbag control unit repair

What is a Citroën C3 Aircross I airbag control unit?

The Citroën C3 Aircross I airbag control unit is the central safety unit that instantly activates all occupant restraint systems, such as airbags and seatbelt pretensioners, in the event of an accident. It continuously monitors sensors, stores important crash data, and ensures the proper functioning of all passive safety modules in the vehicle. A professional Citroën C3 Aircross I airbag control unit repair restores full safety.

This essential component is specifically designed for the first series Citroën C3 Aircross (model years 2017 to 2021).

It forms the brain of the airbag system and is responsible for the precise activation of the restraint systems by processing signals from crash sensors and igniting the corresponding airbags and pyrotechnic belt tensioners within milliseconds.

Why is the Citroën C3 Aircross I airbag control unit defective?

A Citroën C3 Aircross I airbag control unit is often defective because it permanently stores crash data after an accident, preventing it from being reused without a reset. Electrical problems such as short circuits, low voltage, or broken wires can also disrupt internal communication and lead to failure, necessitating immediate Citroën C3 Aircross I airbag control unit repair.

The most common reason for a broken airbag control unit is an accident, as it irrevocably stores so-called crash data.

This data prevents the device from functioning again without special repair, even if there is no externally visible damage and the control unit appears to be intact.

Other causes of failure include electrical defects such as short circuits in the wiring, problems with the power supply or a broken cable, which can damage the sensitive internal circuits.

If the airbag warning light stays on or "no communication with control unit" is displayed on the diagnostic tool, this often indicates a fault or damage to the airbag control unit.

Common error codes for Citroën C3 Aircross I airbag control unit repair

When repairing the Citroën C3 Aircross I airbag control unit, error code U2601 is a common indicator of problems directly with the control unit. This specific code indicates a communication error in the driver airbag deployment circuit, which suggests an internal problem or a faulty connection within the airbag ECU itself and requires immediate workshop diagnostics.

• U2601 → Control unit communication error – driver airbag firing circuit open → Problems in the communication or wiring of the airbag ECU.

The error code U2601 is a direct indication of a fault that affects the airbag control unit itself and not external sensors or other modules.

It signals an open circuit at the driver airbag igniter, which impairs the function of the entire system and requires professional repair of the unit.

In addition to specific codes, a defective airbag control unit can also cause general symptoms such as "no communication with control unit" in the diagnostic tool, which also requires a comprehensive diagnosis.

What part numbers are available for the Citroën C3 Aircross I airbag control unit repair?

For the Citroën C3 Aircross I airbag control unit repair, the exact OEM part number 1629061480 (alternatively 16 290 614 80) is crucial. This number identifies the original part for models built between 2017 and 2021. Correct identification of the part number is essential for a successful repair and the full functionality of the safety system to avoid failure.

The only verified and correct OEM part number for the airbag control unit of the Citroën C3 Aircross I (model years 2017-2021) is 1629061480 (or 16 290 614 80).

This number is maintained by Citroën itself and its direct parts dealers as the exact original part to ensure the highest level of safety.

It is important to note that other similar sounding part numbers such as 9651927380, 9651927580 or 9660731680 apply to older or other C3 models and are not compatible with the C3 Aircross I.

Using an incorrect part number can compromise safety and must be avoided when repairing a Citroën C3 Aircross I airbag control unit.