Airbag control unit with part number P31423599

What does the airbag control unit P31423599 do?

The airbag control unit P31423599 is the central control unit for the restraint system (SRS) of Volvo. It processes the messages from the crash sensors and, in an impact, decides within milliseconds which airbags and seatbelt pretensioners fire. After an accident, it stores crash data and locks itself.

The manufacturer number Bosch 0285012741 is also stamped on the housing.

The system checks itself during operation. If the unit finds a deviation, the airbag warning light in the instrument cluster displays it.

Why does the control unit P31423599 fail?

Crash data remaining in memory after an accident is the most common trigger, even without an airbag deployment; a standard diagnostic tool cannot erase it. Other causes include aged electronics, dry solder joints, moisture and corrosion on plug connections, and voltage spikes.

Stored crash data stays in the unit and keeps the fault in place, even if the vehicle appears unremarkable. A diagnostic tool cannot reset this state.

The other causes mainly concern the electronics: components age, solder joints can go cold, moisture and corrosion damage plug connections, and voltage spikes arise, for example, with a weak battery or a jump start.

How can you tell that the P31423599 is defective?

You will first recognise a defect by the airbag warning light, which lights up permanently or intermittently. A fault message in the instrument cluster, a diagnostic tool without a connection, or a fault memory that cannot be cleared also point to it. In an emergency, the airbags and seatbelt pretensioners may then not deploy.

The airbag warning light in the instrument cluster shows that something in the system is not right. A fault message may come with it; a diagnostic tool that finds no connection to the control unit, and a fault memory that cannot be cleared, also belong among the signs. Have such signs checked promptly.

Which vehicles is the P31423599 fitted in?

A look at the list clarifies whether your vehicle is affected. Control unit P31423599 is fitted for Volvo in these vehicles: Volvo XC60 Y20 (2008–2013) and Y20 Facelift (2013-2017).

The following assignment applies:

• Volvo XC60 Y20 (2008–2013)
• Volvo XC60 Y20 Facelift (2013-2017)

A comparison with this page only confirms the identity of the unit if you read the number from the label. Only the fault memory read out shows whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 285012268, 31318792, 31658440, P 31406637, P31313827, P31318792.

How does the repair of the P31423599 work?

Testing, repairing and checking at Airbag24 usually takes 3–4 working days. Your process begins with the fault memory, whose log you enclose. Then the battery is disconnected, the unit is removed and the repair order is created online.

Only once the fault memory has been read out and the battery is disconnected may the control unit be removed. Then pack it well and send it in.

At Airbag24 the unit is tested, defective components are repaired, crash data is erased and a function test is carried out. 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 P31423599 get to Airbag24?

You send the unit as a parcel or book a UPS collection. After the repair, Airbag24 sends it back via UPS.

Put the printed repair order into the parcel; pack the unit shock-proof.