Airbag control unit with part number 98221CC021

What does the airbag control unit 98221CC021 do?

The airbag control unit 98221CC021 is the central control unit of the restraint system of Subaru. It evaluates the crash sensors, decides in an emergency whether to trigger airbags and seatbelt pretensioners, and monitors the system continuously. After an accident, it stores crash data and locks itself.

It displays faults in the system via the airbag warning light in the instrument cluster.

Why does the control unit 98221CC021 fail?

The most common cause is crash data stored after an accident, even if no airbag was triggered. On this control unit, deleting the crash data is often not possible; if you want it deleted, contact Airbag24 briefly before sending the unit. Besides this, aged components and moisture come into consideration.

A normal diagnostic tool cannot delete crash data. On its own, it says little about the condition of the rest of the electronics.

Aged components and cold solder joints can restrict the function of the electronics.

Moisture and corrosion at plug connections, as well as voltage spikes, for example from a weak battery or jump-starting, are also among the causes.

How can you tell that the 98221CC021 is defective?

The signs that point to a defect are above all the airbag warning light in the instrument cluster staying on permanently or intermittently, a fault message in the instrument cluster, no contact with the diagnostic tool, and a fault memory that cannot be cleared.

As long as the fault persists, airbags and seatbelt pretensioners may not trigger in an emergency.

Which vehicles is the 98221CC021 fitted in?

The control unit 98221CC021 is fitted in these vehicles: Subaru BRZ ZD8 (from 2021).

The following overview shows the vehicles for this part number.

• Subaru BRZ ZD8 (from 2021)

Compare the part number on the label of the removed unit with this page; that only ensures that it is the correct unit. Have the fault memory read out beforehand, because only the result shows 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 98221CC021 work?

First have the fault memory read out and enclose the log, then disconnect the battery and only then remove the control unit. Then create a repair order online and send in the well-packed unit. Airbag24 checks it on the test bench, repairs defective components and carries out a function test; processing usually takes 3–4 working days.

If you want the crash data deleted, contact Airbag24 briefly before sending the unit.

The order of the steps is fixed for safety reasons.

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 98221CC021 get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge; after the repair Airbag24 returns it by UPS. Put the printed repair order into the parcel and pack the unit shock-resistant.

A sturdy box with padding material protects the unit on the way.