Airbag control unit with part number 9804869980

What does the airbag control unit 9804869980 do?

The airbag control unit 9804869980 forms the central control unit of the restraint system (SRS) in Citroën. In an accident it decides within milliseconds which airbags and seatbelt pretensioners are triggered, and it monitors the crash sensors while doing so. It reports faults via the airbag warning light.

After an accident, the unit stores crash data and locks itself.

The control unit works in the background while driving and checks the connected components.

Why does the control unit 9804869980 fail?

The most common cause is crash data that remains stored after an accident, even without a triggered airbag.

Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Aged components and cold solder joints can cause failures regardless of an accident. Moisture and corrosion disrupt the contacts, and voltage spikes, for example from a weak battery or after a jump start, stress the circuitry.

How can you tell that the 9804869980 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently. A fault message appears alongside it, the diagnostic tool cannot connect to the control unit, and the fault memory cannot be cleared.

In an emergency, airbags and seatbelt pretensioners may then fail to deploy. Even an intermittent light is a reason to have the system checked.

The warning light is the visible sign that something is wrong in the restraint system, and it deserves prompt clarification.

Which vehicles is the 9804869980 fitted in?

The control unit 9804869980 is fitted in these vehicles: Citroën C5 II 1st Facelift (2010-2012), II (2008-2010) and II 2nd Facelift (2012-2017).

The vehicles assigned to this part number are listed here:

• Citroën C5 II 1st Facelift (2010-2012)
• Citroën C5 II (2008-2010)
• Citroën C5 II 2nd Facelift (2012-2017)

It is advisable to first compare the part number on the label of the removed unit with this page; this only confirms that it is the correct unit. Then have the fault memory read out. Only this log shows whether the control unit itself is the cause or a plug or cable.

For the same vehicles, we also repair control units with the part numbers 9657456680, 9665266080, 9665558180, 9674290580.

How does the repair of the 9804869980 work?

First read out the fault memory, and the log goes into the parcel. Then disconnect the battery and remove the control unit. The repair order is created online before the unit is sent in.

Airbag24 tests the unit on the test bench, replaces defective components and carries out a function test. Afterwards your own unit is returned to you.

Processing at Airbag24 usually takes 3–4 working days; this time applies only to inspection, repair and function testing. 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 9804869980 get to Airbag24?

You send the unit in as a parcel, or book UPS collection for an extra charge. Airbag24 returns the repaired unit to you by UPS.

Pack the control unit securely against shocks and enclose the printed repair order.