Airbag control unit with part number P31295676

What does the airbag control unit P31295676 do?

The airbag control unit P31295676 is the central control unit of the restraint system (SRS) of Volvo. It evaluates the signals from the crash sensors, decides within milliseconds in a crash about airbags and seatbelt pretensioners, and monitors the system continuously. After an accident it stores crash data and locks itself.

The manufacturer's part number Bosch 0285010709 is also printed on the housing. Monitoring runs for as long as the vehicle has power, and the device reports faults via the airbag warning light.

In everyday use this work is hardly noticed. It only becomes visible when a fault is reported.

Why does the control unit P31295676 fail?

Most often the cause is crash data stored after an accident, even when no airbag has triggered. A normal diagnostic tool cannot erase them. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery or jump-starting.

The device records crash data at the moment of impact and keeps them until they are deliberately erased. They can document the fault memory even when nothing more is visible on the vehicle.

The other causes tend to develop gradually. An ageing component or a damp plug contact can distort signals before a complete failure occurs.

How can you tell that the P31295676 is defective?

A defect in the P31295676 shows up as the airbag warning light in the instrument cluster lighting up permanently or intermittently. A fault message in the instrument cluster, no connection to the diagnostic tool or a fault memory that cannot be cleared are also signs.

The warning light is the notice you should not overlook, because it reports the fault as soon as the system detects it. A missing connection to the diagnostic tool does not automatically mean that the control unit is defective.

While the finding persists, airbags and seatbelt pretensioners may not trigger in an emergency. Please have the warning light checked.

Which vehicles is the P31295676 fitted in?

The control unit P31295676 is fitted in these vehicles: Volvo V70 B Facelift (2013-2016) and B (2007-2013).

The list shows the vehicles recorded for this part number:

• Volvo V70 B Facelift (2013-2016)
• Volvo V70 B (2007-2013)

Compare the part number on the label of your removed unit with this page, because that only confirms that you have the right unit. Also have the fault memory read out beforehand. Only the log 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 31387019, P31264932, P31406630.

How does the repair of the P31295676 work?

First read out the fault memory and attach the log. Then disconnect the battery and only afterwards remove the control unit P31295676. Next create a repair order online and send in the well-packed unit.

Airbag24 checks it on the test bench, repairs defective components, erases the stored crash data and carries out a function test. Processing at Airbag24 usually takes 3–4 working days. Afterwards your own unit is returned 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 P31295676 get to Airbag24?

You send the control unit P31295676 as a parcel or book a UPS collection for an extra charge. After the repair Airbag24 returns it by UPS.

Put the printed repair order into the parcel and pack the unit shockproof.