Airbag control unit with part number 1629061480

What is the function of the airbag control unit 1629061480?

The airbag control unit with part number 1629061480 is the central control unit for the occupant protection system (SRS) in the Citroën C3 Aircross I. It continuously processes data from acceleration sensors and, in the event of a crash, precisely deploys the airbags and seatbelt pretensioners to protect the occupants.

As a critical safety component of the vehicle—also known as the Supplemental Restraint System (SRS)—this control unit is responsible for the life-saving function of the airbag system. It constantly monitors signals from the crash sensors installed in the vehicle.

In the event of a collision exceeding predefined thresholds, the unit sends ignition pulses to the corresponding airbag modules and seatbelt pretensioners within milliseconds. Therefore, flawless operation is essential for the safety of all occupants.

Why does control unit 1629061480 fail?

Failures of control unit 1629061480 often result from internal electronic malfunctions, water damage, or stored crash data following an accident that prevents further functionality. External factors such as damaged wiring or loose connectors can also cause failure.

A major cause of failure is internal malfunction within the control unit itself. This may include water ingress leading to moisture damage or general electronic faults on the circuit board that degrade components.

After a crash, the control unit stores so‑called crash data. This entry serves to document the incident and locks the unit out of service—even if it appears physically undamaged. Such a lock must be professionally reset.

Furthermore, issues in the control unit’s peripheral circuitry can lead to malfunctions. These include broken or defective wiring, as well as faulty or loose connectors that disrupt communication with sensors and airbag modules.

How do you recognize a fault in control unit 1629061480?

A defect in the airbag control unit 1629061480 primarily manifests as the SRS or airbag warning light remaining illuminated in the instrument cluster. Often, specific diagnostic trouble codes such as B1111 can be read from the fault memory, directly indicating a faulty control unit.

The most obvious sign is the permanently lit SRS indicator light. It alerts the driver that the restraint system is not functioning properly and that airbags may fail to deploy in the event of a crash. The vehicle should be inspected immediately at a workshop.

During a workshop diagnosis, error code B1111 may be retrieved, explicitly pointing to an internal fault within the control unit. In some cases, complete loss of communication may occur, rendering the unit inaccessible via diagnostic tools.

In which models is airbag control unit 1629061480 installed?

The airbag control unit with part number 1629061480 is used as an original equipment manufacturer (OEM) replacement specifically in the Citroën C3 Aircross I. This applies to both the first generation produced from 2010 to 2015 and the facelift model manufactured from 2015 to 2021.

At Airbag24, we repair this control unit for the following specific vehicle models and series:

Citroën C3 Aircross I (model years 2010–2015)

Citroën C3 Aircross I Facelift (model years 2015–2021)

The alternative notation for the part number is 16 290 614 80.

How is the repair of control unit 1629061480 carried out?

Professional repair of control unit 1629061480 at Airbag24 begins with a detailed fault analysis. Defective components are then replaced by specialized technicians, stored crash data is erased, and all functions are verified on test benches to restore full safety.

Upon sending the removed control unit to Airbag24, a comprehensive initial inspection is performed using state-of-the-art diagnostic technology. This verifies the reported fault and examines the unit for additional, potentially hidden defects.

The next step involves actual repair by experienced mechatronics engineers. Depending on the nature of the fault, defective electronic components on the circuit board are replaced, or—if necessary after a crash—the stored crash data is securely and completely erased. Subsequently, all associated components, such as wiring and connectors, are thoroughly checked.

If the control unit is irreparably damaged, a certified, ready-to-use, remanufactured replacement unit is offered as an alternative. Each completed repair comes with 2 years' statutory liability for defects.

Important safety note: Before removing the control unit from the vehicle, disconnect the battery for at least 10 minutes to prevent accidental airbag deployment.