Airbag control unit with part number 98221CC091

What does the airbag control unit 98221CC091 do?

The airbag control unit 98221CC091 is the switching point of the restraint system for Subaru. It processes the crash sensor signals, determines in an accident whether airbags and seatbelt pretensioners are triggered, and checks function continuously. After an accident it stores crash data and locks itself.

This includes monitoring all components that count in an emergency.

If it detects a fault, it reports it via the airbag warning light so that the driver can act.

Why does the control unit 98221CC091 fail?

Stored crash data after an accident is the most common cause with the 98221CC091, even if no airbag has triggered. An ordinary diagnostic tool cannot delete it. Other causes are aged components, cold solder joints, moisture and corrosion on plugs, and voltage spikes.

Crash data forms a separate entry in the memory. It remains there regardless of whether the device otherwise behaves inconspicuously.

Ageing and cold solder joints act silently in the background. Moisture, corrosion and voltage spikes, on the other hand, attack the electronics directly.

How can you tell that the 98221CC091 is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently, and an error message appears in the instrument cluster. Even if the diagnostic tool cannot establish a connection or the fault memory cannot be cleared, that indicates a defect. Airbags and seatbelt pretensioners may then possibly not trigger in an emergency.

A defect can be recognised by the following signs:

• Airbag warning light stays on permanently or intermittently
• Error message in the instrument cluster
• Diagnostic tool cannot reach the control unit
• Fault memory cannot be cleared

None of these signs reveals which component is affected. Reading out the fault memory is needed for that.

Which vehicles is the 98221CC091 fitted in?

The airbag control unit 98221CC091 is fitted in these vehicles: Subaru BRZ ZD8 (from 2021). A comparison with your vehicle's papers clarifies the fit.

The assignment follows in this overview:

• Subaru BRZ ZD8 (from 2021)

Comparing the label part number with this page ensures that it is the right device, nothing more. You have the fault memory read beforehand; only its contents show 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 98221CC001, 98221CC120.

How does the repair of the 98221CC091 work?

First comes the fault memory: have it read out and attach the log to the repair order. Only then disconnect the battery and remove the control unit 98221CC091. Processing at Airbag24 usually takes 3–4 working days.

You then create a repair order online and send the device in well packed. Airbag24 checks it on the test bench, repairs defective components, deletes stored crash data and carries out a function test.

Your own device 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 98221CC091 get to Airbag24?

The control unit 98221CC091 comes to Airbag24 as a parcel, or you book a UPS collection for an extra charge. After the repair, UPS brings it back to you.

Put the printed repair order into the parcel, and pack the device shockproof.