Airbag control unit with part number P31476103

What does the airbag control unit P31476103 do?

The airbag control unit P31476103 is the central control unit of the restraint system (SRS) of Volvo. It evaluates the signals from the crash sensors, decides in an accident within milliseconds which airbags and seatbelt pretensioners are triggered, and monitors the system continuously. It reports faults via the airbag warning light.

After an accident, the control unit stores crash data and locks itself. The manufacturer's part number Bosch 0285013339 is also printed on the housing.

Why does the control unit P31476103 fail?

Stored crash data is the most common cause, even if no airbag was deployed. Also aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery or after jump-starting.

Stored crash data cannot be erased with a normal diagnostic tool, so it remains in the unit. The other causes concern the electronics and their connections, and they are hard to judge from the outside.

How can you tell that the P31476103 is defective?

A defect shows itself through the airbag warning light in the instrument cluster, which lights up permanently or intermittently, through an error message in the instrument cluster, through a missing connection between the diagnostic tool and the control unit, or through a fault memory that cannot be cleared. Airbags and seatbelt pretensioners may then not trigger in an emergency.

The signs at a glance:

• airbag warning light on permanently or intermittently
• error message in the instrument cluster
• diagnostic tool gets no connection to the control unit
• fault memory cannot be cleared

If the warning light comes on, you should act promptly.

Which vehicles is the P31476103 fitted in?

The airbag control unit P31476103 is fitted in these vehicles: Volvo S60 Y20 (2010-2013) and Y20 Facelift (2013-2018); Volvo XC60 Y20 (2008–2013) and Y20 Facelift (2013-2017); Volvo V60 1st generation (2010-2013) and 1st generation Facelift (2013-2018). The model and year of construction of your vehicle show whether it belongs to them.

For this number we list the following vehicles:

• Volvo S60 Y20 (2010-2013)
• Volvo S60 Y20 Facelift (2013-2018)
• Volvo XC60 Y20 (2008–2013)
• Volvo XC60 Y20 Facelift (2013-2017)
• Volvo V60 1st generation (2010-2013)
• Volvo V60 1st generation Facelift (2013-2018)

Compare the part number on the label of the removed unit with this page, so that you can be sure it is the right unit. Also have the fault memory read out, because 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 285010943, 285012268, 31318792, 31476103, 31658440, P 31406637.

How does the repair of the P31476103 work?

First have the fault memory read out and enclose the log. Then disconnect the battery and only afterwards remove the control unit. Then create a repair order online and send the unit in well packed. Processing at Airbag24 usually takes 3–4 working days.

Your part ends with sending it in: you have it read out, disconnect the battery, remove the unit and pack it. Airbag24 then takes over the checking, repairing and testing.

Airbag24 checks the unit on the test bench, replaces defective components and erases stored crash data. A function test follows, and then 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 P31476103 get to Airbag24?

You send the control unit P31476103 in as a parcel, or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

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