Airbag control unit with part number 9673576980

What does the airbag control unit 9673576980 do?

9673576980 is the airbag control unit of the restraint system in Citroën vehicles. It processes the signals from the crash sensors and, in an accident, selects within milliseconds the airbags and seatbelt pretensioners that are to trigger.

The unit also monitors the system continuously during operation. If it detects a fault, it indicates this via the airbag warning light in the instrument cluster.

As soon as an accident has occurred, it stores crash data and locks itself.

Why does the control unit 9673576980 fail?

The most common cause is crash data from an earlier accident, even without a triggered airbag. The control unit retains it, and an ordinary diagnostic tool cannot remove it.

Aged electronic components also cause failures, as do cold solder joints inside the unit. Moisture and corrosion at the plug connections belong here as well.

Voltage spikes also affect the electronics, for example with a weak battery or when jump-starting.

How can you tell that the 9673576980 is defective?

A defect in the 9673576980 shows up in the airbag warning light in the instrument cluster, which lights up permanently or intermittently. Error messages may also appear, the diagnostic tool may lose its connection to the control unit, or the fault memory cannot be cleared.

Such signs mean that airbags and seatbelt pretensioners may fail to deploy in an emergency. This applies even when the light only comes on intermittently.

The warning light is therefore the signal from the control unit itself. If you see it, there is a clear reason to have the cause clarified.

Which vehicles is the 9673576980 fitted in?

The 9673576980 is fitted in these vehicles: Citroën C4 Picasso I (2006-2010) and I Facelift (2010-2013); Citroën C4 II Facelift (2015-2018) and II (2010-2015).

You will find the individual vehicles here:

• Citroën C4 Picasso I (2006-2010)
• Citroën C4 Picasso I Facelift (2010-2013)
• Citroën C4 II Facelift (2015-2018)
• Citroën C4 II (2010-2015)

You can compare the label of the removed unit with this page; if the part number matches, you have the right control unit. Before sending it in, have the fault memory read out. This finding shows whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 285012934, 606474700, 6546A8, 9664217980, 9665396680, 9673580380.

How does the repair of the 9673576980 work?

First have the fault memory read out and enclose the log. Then disconnect the battery and only then remove the control unit 9673576980. Airbag24 checks the unit afterwards.

The order is binding, because safety comes first. As soon as the unit has been removed, you create a repair order online and send it in.

At Airbag24 the unit is checked on the test bench, defective components are repaired and stored crash data is erased. A function test follows, and then your own unit is returned to you. Processing usually takes 3–4 working days.

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 9673576980 get to Airbag24?

You send the control unit 9673576980 as a parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

Put the printed repair order into the parcel, and pack the unit shock-proof.