Airbag control unit with part number 9803834980

What does the airbag control unit 9803834980 do?

The airbag control unit 9803834980 is the central control unit of the restraint system (SRS) of Citroën. It evaluates the crash sensors, decides in an accident on airbags and seatbelt pretensioners, and monitors the system continuously.

The decision on triggering is made within fractions of a second. Faults are reported by the unit via the airbag warning light in the instrument cluster.

After an accident the control unit stores crash data and locks itself. The causes of this are explained in the next section.

Why does the control unit 9803834980 fail?

Stored crash data after an accident is the most common cause, even if no airbag has deployed. Further causes are aged components, cold solder joints, moisture and corrosion, and voltage spikes.

Crash data remains in the control unit, even if the car drives inconspicuously again afterwards. The warning light then continues to show the state of the system.

The other causes act independently of an accident: electronics change over time, solder joints give way, and moisture or corrosion attacks the plugs. Voltage spikes arise, for example, with a weak battery.

How can you tell that the 9803834980 is defective?

A defect shows up in the airbag warning light, in fault messages in the instrument cluster, in a missing connection to the diagnostic tool, or in a fault memory that cannot be cleared.

• Airbag warning light is on constantly
• Airbag warning light is on intermittently
• Fault message in the instrument cluster
• Diagnostic tool cannot reach the control unit
• Fault memory cannot be cleared

In an emergency the airbags and seatbelt pretensioners may fail to deploy. Have such a display checked promptly.

Only reading out the fault memory shows whether the control unit is defective.

Which vehicles is the 9803834980 fitted in?

The assignment applies to Citroën. The airbag control unit 9803834980 is fitted in these vehicles: Citroën C3 II Facelift (2013-2017) and II (2009-2013).

These vehicles are recorded:

• Citroën C3 II Facelift (2013-2017)
• Citroën C3 II (2009-2013)

Use this page to compare the part number on the label. It only confirms that you have the correct unit. Have the fault memory read out beforehand; only then is it clear whether the control unit is defective or a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 00006546T7, 618300400, 626181500, 9656888580, 9673657880, 98 038 323 80.

How does the repair of the 9803834980 work?

First have the fault memory of the 9803834980 read out and enclose the log. Then disconnect the battery and remove the control unit. Testing, repairing and checking at Airbag24 usually take 3–4 working days.

Then create the repair order online and send the carefully packed unit. Airbag24 checks the unit on the test bench, replaces defective components and carries out a function test, after which your own unit comes back to you.

Our repairs come with 2 years' statutory liability for defects. The repaired control unit comes back with all vehicle data and is ready for use as soon as it is refitted — no coding or programming is required.

How does the control unit 9803834980 get to Airbag24?

Your route is either a parcel that you send yourself, or a UPS collection that you book for an extra charge. After the repair Airbag24 sends the 9803834980 back to you by UPS.

The printed repair order goes into the parcel. The packaging must be shockproof.