Airbag control unit with part number 9803905480

What does the airbag control unit 9803905480 do?

The airbag control unit 9803905480 is the central control unit of the restraint system (SRS) for Peugeot. It evaluates the crash sensors, decides in an accident within milliseconds on the triggering of airbags and seatbelt pretensioners, and displays faults via the airbag warning light.

In normal operation it monitors the entire system. After an accident it stores crash data and locks itself.

The sensors and the triggering are connected to this unit, which is why its function is decisive for protection in the vehicle.

Why does the control unit 9803905480 fail?

The most common cause is crash data stored after an accident, even if no airbag fired; an ordinary diagnostic tool cannot erase it. Further causes are ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery or a jump start.

Airbag24 erases these data during the repair. Erasing them with common means does not work.

The other causes relate to ageing, moisture and electrical loads. They do not always show up immediately.

How can you tell that the 9803905480 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, a fault message appears in the instrument cluster, the diagnostic tool gets no connection to the control unit, and the fault memory cannot be cleared. In a crash, airbags and seatbelt pretensioners may then possibly not fire.

The light reports the fault itself as soon as the system detects one. A look at the instrument cluster after every start is therefore worthwhile.

If you see one of these signs, waiting brings no certainty. A prompt check creates clarity.

Which vehicles is the 9803905480 fitted in?

The airbag control unit 9803905480 is fitted in these vehicles: Peugeot 308 II (2013-2017) and II Facelift (2017-2021).

The vehicles recorded for this unit are listed below:

• Peugeot 308 II (2013-2017)
• Peugeot 308 II Facelift (2017-2021)

Compare the part number on the label of the removed unit with this page; this only ensures that you have the correct unit. Read out the fault memory beforehand too, because only this log shows whether the control unit is defective or a plug or cable is causing the fault.

For the same vehicles, we also repair control units with the part numbers 624926000, 9807568180.

How does the repair of the 9803905480 work?

The fault memory is read out before anything else, and the log is enclosed. Disconnect the battery before removing the control unit. Create a repair order online and send in the well-packed unit. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench and replaces defective components. Afterwards it erases the crash data and performs a functional test.

The own unit then goes back 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 9803905480 get to Airbag24?

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

Enclose the printed repair order in the parcel and pack the unit shockproof.