Airbag control unit with part number 9677253280

What does the airbag control unit 9677253280 do?

The airbag control unit 9677253280 is the central control unit of the restraint system (SRS) for Citroën. It evaluates the signals from the crash sensors and, in the event of a crash, decides within milliseconds which airbags and seatbelt pretensioners are triggered.

During operation, the unit monitors the entire system. It checks sensors, wiring and control circuits and reports any faults it detects via the airbag warning light in the instrument cluster.

After an accident, the control unit stores crash data and locks itself. This lock is only lifted by the repair.

Why does the control unit 9677253280 fail?

The most common cause with the control unit 9677253280 is crash data stored after an accident, even if no airbag has deployed. Other possible causes include ageing electronic components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes, for example from a weak battery or jump-starting.

A normal diagnostic tool cannot erase this crash data. It remains in memory until Airbag24 deletes it during the repair.

The other causes relate to the electronics and their connections. Ageing components and cold solder joints can cause contact problems. Moisture and corrosion on plugs have the same effect, and voltage spikes add further stress to the circuitry.

How can you tell that the 9677253280 is defective?

A defect in the 9677253280 shows up as the airbag warning light in the instrument cluster, which lights up permanently or intermittently. Other signs are a fault message in the instrument cluster, a diagnostic tool that cannot connect to the control unit, and a fault memory that cannot be cleared.

If any of these signs appear, a check is advisable. The warning light reflects the state of the system, regardless of how the vehicle feels in everyday use.

In an emergency, airbags and seatbelt pretensioners may not deploy. Please have the system checked promptly.

Which vehicles is the 9677253280 fitted in?

The airbag control unit 9677253280 is fitted in these vehicles: Citroën C3 Picasso I (2009-2012) and I Facelift (2012-2017). Your vehicle papers show whether your car is one of them.

The following vehicles are known to use this unit:

• Citroën C3 Picasso I (2009-2012)
• Citroën C3 Picasso I Facelift (2012-2017)

First, compare the part number on the label of the removed unit with this page. This only confirms that you have the correct unit in front of you. Second, have the fault memory read out beforehand. Only this log shows whether the control unit itself is faulty or whether a connector or a cable is the cause.

For the same vehicles, we also repair control units with the part numbers 9803837180.

How does the repair of the 9677253280 work?

Airbag24 typically needs 3–4 working days to check, repair and test the 9677253280. Your own steps follow in this order.

For safety reasons, the order is fixed. First, have the fault memory read out and enclose the log. Then disconnect the battery. Only after that remove the control unit, create the repair order online and send the unit well packed.

Airbag24 checks the unit on the test bench, repairs defective components, deletes the stored crash data and carries out a function test. Your own unit is then returned 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 9677253280 get to Airbag24?

The control unit 9677253280 is sent to Airbag24 as a parcel; alternatively, you can book a UPS collection for an extra charge. Your own unit is returned by UPS once the repair is complete.

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