Airbag control unit with part number 9829595180

What is the function of the airbag control unit 9829595180?

The airbag control unit 9829595180 is the central control module of the occupant protection system (SRS) in the Citroën C4X III (2022–2024). It continuously analyzes data from crash sensors and is responsible for precisely deploying airbags and seatbelt pretensioners at the exact right moment in the event of a collision, ensuring maximum safety.

As the “brain” of the safety system, it communicates with all relevant components—from front and side impact sensors to individual airbag modules and pyrotechnic seatbelt pretensioners. Proper functionality is critical for the vehicle’s passive safety.

Why does the control unit 9829595180 fail?

The most common cause of failure is the storage of crash data after an accident, which locks the system for safety reasons. Similarly, internal electronic faults that trigger error code B1111 (“control unit defective”) can result in complete system failure. Physical factors such as moisture or cable breaks can also impair operation.

A typical issue involves stored crash events in the unit’s internal memory. Even after accident repairs, this data lock remains active, preventing reactivation of the airbag system until the data is professionally reset.

In addition, hardware defects may occur directly on the circuit board. Faulty solder joints, damaged components, or power supply problems can lead to communication interruptions or the warning light remaining constantly illuminated. External influences, such as cable breaks near the seat adjustment mechanism or ingress of moisture, are also well-known sources of failure.

This control unit is technically related to part numbers 9835661480 and 680009600 for Citroën models, indicating a similar design.

How do you recognize a defect in the control unit 9829595180?

The clearest symptom is a permanently lit or flashing SRS airbag warning light in the cockpit. Often, communication with the control unit via a diagnostic tool is no longer possible. A fault code stored in the error memory, such as B1111 (“control unit defective”), confirms suspicion of an internal malfunction.

The constantly illuminated warning light serves as the primary alert for the driver, indicating that the entire occupant protection system is disabled and that airbags or seatbelt pretensioners would not deploy in the event of a crash.

Another clear sign is when the workshop’s diagnostic equipment cannot access the airbag module. This refusal to communicate points to a severe internal fault that often requires specialized repair.

In which vehicles is the control unit 9829595180 installed?

The airbag control unit with part number 9829595180 was specifically developed for Citroën vehicles. At Airbag24, we specialize in repairing this unit for the following model to ensure precise and reliable restoration.

The following model is equipped with this control unit:

Citroën C4X III (model years 2022–2024)

How is the control unit 9829595180 professionally repaired?

At Airbag24, repairs are performed at the electronic level. Following an initial inspection, stored crash data is erased, and any internal hardware defects on the circuit board are rectified. A final functional test ensures full operational readiness. Repairs come with 2 years' statutory liability for defects.

The repair process begins with a detailed analysis, during which the unit is read out and examined for physical damage. This ensures that the exact cause of the fault—whether it’s a locked crash-data memory or a component defect—is identified.

Subsequently, specialized technicians carry out the restoration, safely removing crash data from the memory chip and repairing or replacing faulty electronic components on the main circuit board. After repair, the control unit undergoes comprehensive testing to guarantee seamless communication with the vehicle once again.