Airbag control unit with part number 9644900380

What does the airbag control unit 9644900380 do?

The airbag control unit 9644900380 manages the restraint system in vehicles from Peugeot. In a crash it processes the signals from the crash sensors and decides within milliseconds which airbags and seatbelt pretensioners are triggered. It also checks the system permanently and shows faults via the airbag warning light.

In everyday use the unit hardly stands out, because it works constantly in the background and monitors voltage, connections and sensors.

An accident causes the unit to store crash data and lock itself.

Why does the control unit 9644900380 fail?

Stored crash data from an earlier accident is the most common cause, even if no airbag was deployed. An ordinary diagnostic tool cannot erase it. Other possible causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes. Airbag24 erases the crash data during repair.

Crash data is a separate memory entry. It does not disappear by itself but remains until the repair.

The other causes act over a longer period. Solder joints become brittle, moisture attacks the contacts, and electronic components lose performance with age.

Voltage spikes occur when the battery is weak or when a vehicle is started with jump leads.

How can you tell that the 9644900380 is defective?

A defect shows up as the airbag warning light in the instrument cluster, which lights up permanently or intermittently, as a fault message in the instrument cluster, as a diagnostic tool with no connection to the control unit, or as a fault memory that cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to trigger.

The warning light signals a detected fault even when the engine runs normally. Therefore watch it after you switch on the ignition.

Only reading out the fault memory shows how serious the fault is.

Which vehicles is the 9644900380 fitted in?

The control unit 9644900380 is fitted in these vehicles: Peugeot 206 I (1998-2003) and I Facelift (2003-2009).

The following list shows the vehicles stored for this number.

• Peugeot 206 I (1998-2003)
• Peugeot 206 I Facelift (2003-2009)

Compare the part number on the label of the removed unit with this page. That only ensures that it is the correct unit. Have the fault memory read out beforehand: only the result shows whether the control unit is defective or whether a plug or a cable is the cause.

For the same vehicles, we also repair control units with the part numbers 550 54 15 00, 602 32 73 00, 6547WJ, 9635268880, 9636894080, 9641478080.

How does the repair of the 9644900380 work?

First have the fault memory read out and attach the log to the unit. Then disconnect the battery and only then remove the control unit. Afterwards create a repair order online and send the unit off well packed.

At Airbag24, testing, repair and function test usually take 3–4 working days. There the unit is examined on the test bench, defective components are replaced and the stored crash data is erased. The unit is then returned.

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 9644900380 get to Airbag24?

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

The printed repair order goes into the parcel, and the unit is packed shockproof.