Airbag control unit with part number 9665355680

What does the airbag control unit 9665355680 do?

The airbag control unit 9665355680 is the central control unit of the restraint system (SRS) of Peugeot. It processes the measured values of the crash sensors, determines in a crash within milliseconds which airbags and seatbelt pretensioners are triggered, and monitors the system without interruption. After a crash it stores crash data and locks itself.

Monitoring runs continuously, even when the vehicle is standing still. The unit displays faults via the airbag warning light.

Why does the control unit 9665355680 fail?

Stored crash data is the most common cause, even if no airbag was triggered in the accident. Diagnostic tools cannot erase it. In addition there are aged components, cold solder joints, moisture and corrosion at plug connectors, and voltage peaks.

The control unit creates the crash data itself. A normal read-out shows it, but does not remove it. Airbag24 erases it during the repair.

The other causes arise from age and environment. Moisture on plugs, oxidation at contacts and sudden voltage changes when starting can impair the electronics.

How can you tell that the 9665355680 is defective?

The airbag warning light in the instrument cluster lights up constantly or intermittently. Accompanying this, a fault message appears, the diagnostic tool does not find the control unit, or the fault memory remains after clearing. Then the airbags and seatbelt pretensioners may fail to trigger in an emergency.

The warning light is the signal you see first. If it does not go out after the ignition is switched on, or comes back while driving, there is a fault.

Then have the system checked promptly, and do not wait until a further sign appears.

Which vehicles is the 9665355680 fitted in?

The airbag control unit 9665355680 is fitted in these vehicles: Peugeot 307 I (2001-2005) and I Facelift (2005-2009); Peugeot 307 SW I (2001-2005) and I Facelift (2005-2009).

The following vehicles are on record:

• Peugeot 307 I (2001-2005)
• Peugeot 307 I Facelift (2005-2009)
• Peugeot 307 SW I (2001-2005)
• Peugeot 307 SW I Facelift (2005-2009)

Compare the part number on the label of the removed unit with this page; this only ensures that it is the correct unit. Also have the fault memory read out beforehand, because only the result shows whether the control unit itself or a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 6545HE, 6545HF, 6545HJ, 9650109280, 9650109480, 9652712180.

How does the repair of the 9665355680 work?

First you read out the fault memory and enclose the log, then you disconnect the battery and only afterwards remove the control unit. Online you create a repair order and send in the well-packed unit. Airbag24 checks it on the test bench, replaces defective components, erases crash data, carries out a function test and returns your own unit.

The sequence is mandatory, because the airbag system must be de-energised before removal. The battery therefore stays disconnected during removal.

At Airbag24 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 9665355680 get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. After the repair Airbag24 returns it by UPS; the printed repair order goes into the parcel.

The control unit is packed shock-resistant, so that it survives transport undamaged.