Airbag control unit with part number P32315799

What does the airbag control unit P32315799 do?

The airbag control unit P32315799 is the control centre of the restraint system (SRS) in Volvo vehicles. It processes the signals from the crash sensors and decides in an accident which airbags and seatbelt pretensioners are triggered.

This decision is made within milliseconds. During operation, the unit monitors the entire system and shows faults via the airbag warning light in the instrument cluster.

After an accident, the control unit stores crash data and locks itself.

Why does the control unit P32315799 fail?

The most common cause is crash data stored after an accident, even if no airbag was triggered. A normal diagnostic tool cannot erase this data. Airbag24 removes it during the repair.

Further causes that can play a role in a failure are:

• aged electronic components
• cold solder joints
• moisture and corrosion on plug connections
• voltage spikes, for example from a weak battery or jump-starting

How can you tell that the P32315799 is defective?

The airbag warning light lights up permanently or intermittently, and a fault message appears in the instrument cluster. The diagnostic tool also receives no connection to the control unit.

• Airbag warning light lights up permanently or intermittently
• Fault message in the instrument cluster
• No connection between the diagnostic tool and the control unit
• Fault memory cannot be cleared

If these signs occur, airbags and seatbelt pretensioners may not be able to trigger in an emergency. A check then provides clarity.

Which vehicles is the P32315799 fitted in?

The control unit P32315799 is fitted in these vehicles: Volvo C40 Serie 1 (from 2021). The details on the unit and the list show whether your vehicle is among them.

Here follows the list of vehicles:

• Volvo C40 Serie 1 (from 2021)

Compare the part number on the label of the removed unit with this page; this only ensures that it is the correct unit. Afterwards, have the fault memory read out, because only this result shows whether the control unit itself or a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers P32246116.

How does the repair of the P32315799 work?

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

Airbag24 checks the unit on the test bench, repairs defective components and erases the stored crash data. A function test follows, and your own unit returns to you.

Processing at Airbag24 usually takes 3–4 working days, and this time covers only checking, repairing and testing.

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 P32315799 get to Airbag24?

You send the control unit P32315799 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.