Airbag control unit with part number 9633621180

What does the airbag control unit 9633621180 do?

The airbag control unit 9633621180 is the control unit of the restraint system (SRS) in Peugeot. It processes the signals from the crash sensors and decides in the event of an accident which airbags and seatbelt pretensioners are triggered.

The decision is made by the unit within milliseconds. At the same time, it checks the entire system so that faults are noticed early.

If faults occur, the control unit stores them and shows them via the airbag warning light. The message appears in the instrument cluster.

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

Why does the control unit 9633621180 fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed. A normal diagnostic tool cannot erase this data.

Other causes in general are:

• aged electronic components
• cold solder joints
• moisture and corrosion at plug connectors
• voltage spikes, for example from a weak battery or a jump start

The crash data can be removed at Airbag24 during the repair, so that the unit works again afterwards.

How can you tell that the 9633621180 is defective?

A defect shows up as the airbag warning light in the instrument cluster, which stays on permanently or intermittently. In addition, there are error messages in the instrument cluster, no connection to the diagnostic tool, and a fault memory that cannot be cleared.

The following signs point to a defect in the control unit:

• airbag warning light that stays on permanently or intermittently
• error message in the instrument cluster
• diagnostic tool gets no connection to the control unit
• fault memory cannot be cleared

If the fault is ignored, airbags and seatbelt pretensioners may possibly not trigger in an emergency.

Which vehicles is the 9633621180 fitted in?

The airbag control unit 9633621180 is fitted in these vehicles: Peugeot 306 I (1993-1997) and I Facelift (1997-2002).

The vehicles we have on file for this part number are shown here:

• Peugeot 306 I (1993-1997)
• Peugeot 306 I Facelift (1997-2002)

Have the fault memory read out before removing the unit. That way it can be established with certainty whether the control unit is defective or a plug or a cable is the cause. Then compare the part number on the label of the removed unit with 9633621180.

For the same vehicles, we also repair control units with the part numbers 9620732580, 9621996780, 9636995580.

How does the repair of the 9633621180 work?

You read out the fault memory before removal and attach the log. Then you disconnect the battery, remove the control unit, create the repair order online and send the unit in well packed. Airbag24 tests and repairs the unit and sends it back to you.

Take care when removing the unit so that the plugs and housing are not damaged.

At Airbag24, the unit is examined on the test bench. Defective components are replaced, the crash data is deleted and a function test is carried out. Processing usually takes 3–4 working days, and this time applies only to checking, repairing and testing at Airbag24.

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 9633621180 get to Airbag24?

You send the unit as a parcel, or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back by UPS.

Include the printed repair order in the parcel and pack the unit shock-proof.