Airbag control unit with part number 9849195480

What is the function of the airbag control unit 9849195480?

The airbag control unit with part number 9849195480 is the central control unit of the occupant safety system (SRS) in the Citroën C4X III (2022–2024). It processes data from crash sensors and, within milliseconds, decides whether to deploy airbags and seatbelt pretensioners to protect occupants in the event of a collision.

Technically speaking, this control unit acts as the brain of the passive safety system. It continuously monitors all connected components, such as acceleration sensors, seat occupancy mats, and the ignition circuits for pyrotechnic charges.

In the Citroën C4X III, the unit is typically installed in the center console, usually beneath the handbrake lever. This location protects it from minor damage but also makes it vulnerable to liquid damage if beverages are spilled.

Why does the control unit 9849195480 fail?

The most common cause of failure for control unit 9849195480 is internally stored crash data following an accident, which prevents further functionality. Other reasons include electronic malfunctions indicated by error code B1111 (control unit defective), as well as water damage or communication errors with other vehicle systems.

After an accident—even at low impact speeds—the control unit stores what’s known as a “crash record” in its internal memory. This record is permanent and cannot be erased using standard workshop diagnostic tools. While it ensures safety by preventing unintended re‑deployment, it simultaneously locks the entire system.

Hardware defects are also a frequent source of issues. Internal components on the circuit board can fail due to aging, vibrations, or voltage spikes. Such failures are often documented by the specific error code B1111 in the vehicle’s fault memory and require component‑level repair.

External factors like corrosion caused by moisture ingress or damaged connectors can also lead to communication breakdowns. This results in the control unit no longer being able to reliably receive or transmit data from the sensors, triggering a safety mode.

How do you recognize a defect in the airbag control unit 9849195480?

The clearest sign of a defect in control unit 9849195480 is a permanently illuminated or flashing SRS warning light on the instrument cluster. This indicates that the airbag system is not functioning. Often, the control unit can no longer be accessed with a diagnostic tool either.

The airbag warning light serves as a direct alert to the driver that, in the event of a crash, protection from airbags or seatbelt pretensioners will not be provided. The light remains active after the vehicle is started and does not extinguish as it normally would following a system check.

When reading the fault memory, error code B1111—“control unit defective”—is frequently displayed. This code directly points to an internal, irreparable fault from the perspective of on-board diagnostics and confirms the need for professional inspection.

Especially after an accident, a lit SRS light is a clear indication of stored crash data. Even if there are no visible external damages, the control unit has registered the impact and locked itself, making repair unavoidable.

In which models is the control unit 9849195480 installed?

The airbag control unit with part number 9849195480 is specifically designed for vehicles of the Citroën brand. At Airbag24, we professionally repair this control unit for the following model listed in our database, restoring full functionality to the safety system.

Compatibility includes:

Citroën C4X III (model years 2022–2024)

How is the repair of control unit 9849195480 carried out?

Repair at Airbag24 follows a standardized process: After proper removal and shipment of the unit, our technicians perform a thorough diagnosis. This involves erasing crash data, fixing electronic faults, and resetting the device to factory settings. Each repair comes with 2 years' statutory liability for defects.

For safety reasons, before removal, it is mandatory to disconnect the vehicle battery for at least 10 minutes to prevent accidental airbag deployment. The control unit can then be extracted from the center console.

Upon arrival at Airbag24, control unit 9849195480 is connected to specialized test benches. Using manufacturer‑provided software, internal memories are read to precisely identify faults such as crash data or defective components.

The actual repair involves resetting the memory to factory settings and, if necessary, replacing any defective electronic components on the circuit board. After successful restoration and a final functional test, the unit is returned.

Following reinstallation in the vehicle, the vehicle’s fault memory must be cleared using an appropriate diagnostic tool to fully reactivate the system. We provide 2 years' statutory liability for defects on the completed repair.

Is it worth repairing 9849195480?

Yes, repair is the most economical and technically sensible solution. You can save up to 90% compared to a new part, which may cost between 400 and 750 euros. Since the original control unit remains intact, there’s no need for time-consuming re‑coding at the vehicle, saving both time and additional expenses.

The financial benefit is substantial. While a new control unit from the manufacturer entails significant costs, repair offers a much more affordable alternative without compromising safety or functionality.

An additional key advantage is that the repaired unit is “plug-and-play.” It retains the vehicle‑specific configuration, so no costly, time‑intensive programming or adjustments are required at an authorized workshop after installation.

All repairs are performed in Germany by experienced technicians and are backed by 2 years’ statutory liability for defects, giving you confidence in a reliable, long‑lasting restoration.