Airbag control unit with part number 9825271962

What does the airbag control unit 9825271962 do?

The unit 9825271962 controls the restraint system (SRS) in the vehicle of Citroën. It processes the signals from the crash sensors and decides in an accident, within milliseconds, which airbags and seatbelt pretensioners are triggered.

It checks constantly whether sensors, wiring and trigger control are in order. If it detects a fault, it stores it and displays it via the airbag warning light.

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

Why does the control unit 9825271962 fail?

Crash data that remain in the unit after an accident are the most common cause, even without a triggered airbag. A normal diagnostic tool cannot remove them. Other causes are aged electronics, cold solder joints, moisture on plug connections and voltage spikes.

In addition, the following causes generally come into consideration:

• aged electronic components
• cold solder joints
• moisture and corrosion on plug connections
• voltage spikes, for example from a weak battery or jump-starting

Which of these points applies can only be determined by examining the unit. Only then does it become clear whether the control unit itself is affected.

How can you tell that the 9825271962 is defective?

Signs of a defect are the airbag warning light, which lights up constantly or intermittently, an error message in the instrument cluster, no connection to the diagnostic tool, and a fault memory that cannot be cleared. Then airbags and seatbelt pretensioners may not deploy in an emergency.

If the warning light comes on, it calls for a read-out. The control unit thereby gives you the most important signal it can send.

The diagnostic tool reads out the fault memory as soon as a connection exists. This separates a suspicion from a confirmed finding.

Which vehicles is the 9825271962 fitted in?

The control unit 9825271962 is fitted in these vehicles: Citroën C3 Aircross II Facelift (2021-2024) and II (2017-2021). Whether a particular car belongs to it is shown by comparing the number.

The vehicles are listed here:

• Citroën C3 Aircross II Facelift (2021-2024)
• Citroën C3 Aircross II (2017-2021)

Comparing the part number on the label of the removed unit creates certainty that it is the matching unit. It does not clarify the cause. For that reason, have the fault memory read out beforehand, because only the result shows whether the control unit is defective or whether a connector or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 98 252 770 80, A2C98794709.

How does the repair of the 9825271962 work?

First have the fault memory read out and attach the log, then disconnect the battery and remove the control unit. Next, create a repair order online and send in the carefully packed unit. Processing at Airbag24 usually takes 3–4 working days.

This sequence is mandatory, because safety takes precedence during removal.

At Airbag24 the unit is checked on the test bench before defective components are replaced. Stored crash data are erased and a function test follows. Afterwards the unit returns to you.

The 3–4 working days apply to the work at Airbag24 alone.

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 9825271962 get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. After the repair, the return shipment is made by UPS.

The printed repair order goes into the parcel. Pack the control unit shockproof so that it survives shipping undamaged.