Polestar 3 airbag control unit repair⁽¹⁾

What should be considered with Polestar 3 airbag control units?

The airbag control unit of the Polestar 3 evaluates the crash sensors and triggers the deployment of airbags and belt tensioners. It monitors the entire restraint system and reports faults via the airbag warning light. After an accident, it stores crash data and locks itself.

The Polestar 3 is an electric SUV that has been built since 2022. The restraint system is networked through several sensors and airbag modules, and the control unit forms the central hub of this network. A defective control unit can impair the function of the entire system, even if the airbags appear unremarkable from the outside.

After an accident, the system should not return to operation without expert inspection. Airbag24 repairs the control unit you send in, which is your own unit. Crash data is erased during the repair, the unit is checked for faults, and defective components are repaired.

Which Polestar 3 generations are there?

The Polestar 3 is currently listed as the 1st generation, which has been built since 2022. You can identify the generation by the model year and the vehicle identification number (VIN).

The Polestar 3 is the third model from the brand and was unveiled in 2022. Generation and specification determine which control unit variant is fitted. For this reason, the assignment should be clarified before any repair.

• 1st generation (since 2022) – the series listed so far for the Polestar 3, still in production today.

How do I identify my Polestar 3 airbag control unit?

The part number on the label of the control unit determines the exact version. In addition, you should know the model year and equipment of your vehicle, because both affect which unit is installed.

The part number is often printed directly on the housing of the control unit. It shows which version is fitted and is the most important point of reference for matching the unit to your vehicle.

Fault codes provide a first indication. Examples are U0151 for a lost communication link to the airbag control unit (restraint system) and B15381B for the high-voltage battery disconnect loop in the airbag deployment circuit, which is open or has too high a resistance. However, a single fault code does not yet prove a defect in the unit.

What airbag equipment does the Polestar 3 have?

The operating manuals of the Polestar 3 describe front, side and curtain airbags. On the driver’s side they also list a knee airbag, which sits behind a panel below the steering wheel.

The front airbags are intended for the front occupants, the side airbags are integrated into the seats and the curtain airbags are mounted in the roof lining. Which equipment is actually fitted in your vehicle depends on the model year and specification.

The route to repair runs via a specialist workshop: it reads out the fault memory, disconnects the battery and removes the control unit. You then create a repair order online with Airbag24 and send in the unit. The airbag is safety-relevant, so no one should work on the airbag system themselves.

Processing usually takes 3–4 working days: checking, repairing and testing. 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.