Airbag control unit with part number 9664909780

What does the airbag control unit 9664909780 do?

The airbag control unit 9664909780 controls the airbags and seatbelt pretensioners in Peugeot vehicles. In a crash it evaluates the sensor signals within fractions of a second, decides on deployment and then monitors the components continuously. It reports irregularities via the airbag warning light.

An accident causes the unit to store crash data and lock itself. The lock ends with the repair.

In everyday use the unit shows no irregularities and works quietly in the background. That only changes when it detects a fault.

Why does the control unit 9664909780 fail?

The most common cause is crash data stored after an accident, even if no airbag was triggered. A normal diagnostic tool cannot erase it. Other causes include aged electronics, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes.

Aged electronics and corrosion gradually alter the signal, and the failure then occurs without warning.

Voltage spikes arise, for example, from a weak battery or when jump-starting a vehicle, and can put a strain on the electronics.

How can you tell that the 9664909780 is defective?

Watch for the airbag warning light in the instrument cluster, which stays on permanently or intermittently. Error messages, a diagnostic tool without a connection to the control unit and a fault memory that cannot be cleared also indicate a defect. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

These signs appear individually or together:

• Airbag warning light that stays on permanently or intermittently
• Error message in the instrument cluster
• Diagnostic tool that cannot connect to the control unit
• Fault memory that cannot be cleared

Take such signs seriously. The system's message is a statement about the unit and not a hint you can ignore.

Which vehicles is the 9664909780 fitted in?

The 9664909780 is fitted in these vehicles: Peugeot 308 I (2007-2011) and I Facelift (2011-2015).

Our records list these vehicles for this control unit:

• Peugeot 308 I (2007-2011)
• Peugeot 308 I Facelift (2011-2015)

If the part number on the removed unit matches this page, you have found the correct unit. Have the fault memory read out in advance as well, because only the log shows whether the control unit is affected or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 624926000, 9665100080, 9665100180, 9674291480.

How does the repair of the 9664909780 work?

First have the fault memory read out and enclose the log. Then disconnect the battery, remove the control unit and create a repair order online. Airbag24 generally needs 3–4 working days for inspection, repair and functional testing.

Defective components are replaced at Airbag24, crash data is erased and a functional test is carried out. You then receive your own unit back.

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 9664909780 get to Airbag24?

You send the unit as a parcel to Airbag24 or book a UPS collection for an extra charge. After the repair it is returned to you by UPS.

Well packed, with the printed repair order in the parcel, the unit is protected during transport.