Airbag control unit with part number 9637491980

What does the airbag control unit 9637491980 do?

The airbag control unit 9637491980 is the central control unit of the restraint system (SRS) for Peugeot. It evaluates the signals from the crash sensors and, in an accident, decides within milliseconds which airbags and seatbelt pretensioners are triggered. It monitors the system continuously and reports faults via the airbag warning light.

After an accident, the unit stores crash data and then locks itself. In everyday use, this function remains invisible.

Why does the control unit 9637491980 fail?

Stored crash data is the most common cause: it remains in the memory after an accident even if no airbag has deployed, and a normal diagnostic tool cannot erase it. Other causes are ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery or jump starting.

Airbag24 removes the crash data during the repair. Data can be stored even when no airbag has deployed.

The other causes concern the electronics and their connections, and the test shows which of them applies to your unit.

How can you tell that the 9637491980 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently. In addition, a fault message appears, the diagnostic tool receives no connection to the control unit, or the fault memory cannot be cleared.

Such signs point to a defect which, in an emergency, can mean that airbags and seatbelt pretensioners do not trigger. Therefore, have the system checked promptly, even if the light comes on only intermittently.

Which vehicles is the 9637491980 fitted in?

The 9637491980 is fitted in these vehicles: Peugeot 306 I (1993-1997) and I Facelift (1997-2002).

The following list names the vehicles for which this unit is on file:

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

Compare the part number on the label of the removed unit with this page so that you can be sure you have the correct unit. Have the fault memory read out in advance, because the log shows whether the control unit itself is defective or whether a plug or cable is the cause.

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

How does the repair of the 9637491980 work?

You have the fault memory read out and enclose the log. Then disconnect the battery and only afterwards remove the control unit. In the next step, create a repair order online and send the unit in, packed.

Airbag24 examines the unit on the test bench and replaces defective components. Stored crash data is erased, followed by a function test. Processing at Airbag24 usually takes 3–4 working days, after which your own unit is 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 9637491980 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 to you by UPS.

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