Airbag control unit with part number 98221VA030

What does the airbag control unit 98221VA030 do?

The airbag control unit 98221VA030 is the control unit of the restraint system (SRS) of Subaru. It processes the signals from the crash sensors, decides in an accident within milliseconds whether airbags and seatbelt pretensioners are triggered, and reports faults via the airbag warning light.

Between accidents, the unit checks the entire system for faults on an ongoing basis. This allows it to detect deviations early, so that the restraint system remains available in an emergency.

After an accident, the unit stores crash data and locks itself. This lock ends with the repair.

Why does the control unit 98221VA030 fail?

The most common cause for the 98221VA030 is crash data stored after an accident, even if no airbag was triggered. A normal diagnostic tool cannot remove it. Further causes are aged electronics, cold solder joints, moisture and corrosion, as well as voltage spikes.

The stored data is the reason why the fault does not disappear, even when nothing is visibly wrong. The cause then lies in the memory of the unit and not in the wiring harness.

The other causes affect the electronics themselves. Components can age, solder joints can go cold, and moisture or corrosion clog plug connections. Voltage spikes arise, for example, from a weak battery or from a jump-start.

How can you tell that the 98221VA030 is defective?

On the 98221VA030, a defect shows itself through the airbag warning light in the instrument cluster, which lights up permanently or intermittently, and through an error message in the instrument cluster. The diagnostic tool then receives no connection to the control unit, and the fault memory cannot be cleared.

Precisely because the warning light indicates the defect, the control unit may not work reliably in an emergency. Airbags and seatbelt pretensioners may then not trigger, so you should take the indicator seriously.

Which vehicles is the 98221VA030 fitted in?

The 98221VA030 is fitted in these vehicles: Subaru WRX VA (2014-2021).

The overview below lists the vehicles in which this control unit is installed.

• Subaru WRX VA (2014-2021)

Compare the part number on the label of the removed unit with this page to ensure that it is the right unit. Have the fault memory read beforehand, because only this log shows whether the control unit is defective or whether a connector or a cable is the cause.

For the same vehicles, we also repair control units with the part numbers 98221VA110, 98221VA180, 98221VC031, 98221VC200, 98221VC210.

How does the repair of the 98221VA030 work?

First you read out the fault memory and enclose the log. Then you disconnect the battery and only then remove the control unit. Online, you then create a repair order and send the unit in well packed.

Airbag24 examines the unit on the test bench, repairs defective components, erases the stored crash data and carries out a function test. Processing usually takes 3–4 working days. The unit then 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 98221VA030 get to Airbag24?

You send the control unit 98221VA030 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back by UPS.

Pack the printed repair order into the parcel and pack the unit shock-resistant.