Airbag control unit with part number P9472626

What does the airbag control unit P9472626 do?

The airbag control unit P9472626 coordinates the restraint system (SRS) of Volvo. It processes the signals from the crash sensors, determines within milliseconds in the event of an accident which airbags and seatbelt pretensioners to trigger, and monitors the system continuously. It shows faults via the airbag warning light.

The manufacturer's number Bosch 0285001258 is also printed on the housing. Sensors and triggering elements are connected to the control unit and report their states there.

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

Why does the control unit P9472626 fail?

The most common cause is stored crash data after an accident, even if no airbag was triggered; it cannot be erased with a normal diagnostic tool. Other causes include aged electronic components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes, for example from a weak battery or a jump start.

These records stay in the memory and are erased during a repair.

Aged electronic components gradually lose reliability. Solder joints can already be cold at manufacture and only show up in operation. Moisture and corrosion attack plug connections, and voltage spikes arise, for example, with a weak battery.

How can you tell that the P9472626 is defective?

A fault shows up as the airbag warning light in the instrument cluster, which stays on permanently or intermittently, and as an error message on the display. In addition, the fault memory cannot be cleared, and the diagnostic tool gets no connection to the control unit.

In an emergency, airbags and seatbelt pretensioners may not trigger with such a finding, so the warning must be taken seriously.

The light is checked briefly when the ignition is switched on. If it stays on or comes back while driving, there is a fault that a specialist workshop should read out.

Which vehicles is the P9472626 fitted in?

The control unit P9472626 is fitted in these vehicles: Volvo S80 TS (1998-2003) and TS Facelift (2003-2006). Model and year of construction on the vehicle registration document show whether your car is meant.

The vehicles are listed below:

• Volvo S80 TS (1998-2003)
• Volvo S80 TS Facelift (2003-2006)

Compare the part number on the label of the removed unit with this page. That only confirms that it is the correct unit and does not clarify the cause. Also have the fault memory read out before you remove the control unit; the result shows whether the control unit itself 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 0 285 001 456, 285001254, 285001655, 30721921, 8622368, 8645271.

How does the repair of the P9472626 work?

First have the fault memory read out and add the log. Then disconnect the battery, remove the control unit, create a repair order online and send in the unit well packed. At Airbag24, inspection, repair and function test usually take 3–4 working days.

Airbag24 checks the unit on the test bench, repairs defective components, erases stored crash data and runs a function test. Afterwards, your own unit 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 P9472626 get to Airbag24?

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

Pack the control unit so that it can be transported shockproof, and put the printed repair order in the parcel.