Airbag control unit with part number 98221AN091

What does the airbag control unit 98221AN091 do?

The airbag control unit 98221AN091 is the central control unit of the restraint system for Subaru. It reads the crash sensors and decides within milliseconds in an accident which airbags and seatbelt pretensioners are triggered.

It also monitors the system without interruption. It reports faults via the airbag warning light in the instrument cluster.

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

Why does the control unit 98221AN091 fail?

Stored crash data is the most common cause with the 98221AN091, even if no airbag was triggered after an accident. Aged electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes are also possible causes.

A standard diagnostic tool cannot erase this crash data. Airbag24 erases it during repair, completely, before the unit runs the function test.

Aged components and cold solder joints can impair function. Moisture and corrosion at plugs interrupt the contact, and voltage spikes, for example from a jump-start, place additional strain on the electronics.

How can you tell that the 98221AN091 is defective?

The airbag warning light in the instrument cluster indicates a defect on the 98221AN091 when it lights up. Together with a fault message, a missing connection to the diagnostic tool or a fault memory that cannot be cleared, this is a clear sign.

The warning light is the most important warning sign. While it is lit, airbags and seatbelt pretensioners may not deploy in an emergency.

Have the system checked promptly if you notice these signs. The light shows the finding, so you can see it.

Which vehicles is the 98221AN091 fitted in?

The 98221AN091 is fitted in these vehicles: Subaru Forester SK (2018-2021) and SK Facelift (from 2021).

The overview shows the models assigned to this part number:

• Subaru Forester SK (2018-2021)
• Subaru Forester SK Facelift (from 2021)

Compare the part number on the label of the removed unit with this page, and you will know it is the right unit. Whether the unit is defective or a plug or cable is the cause is shown only by reading out the fault memory. Have it read out before removal.

For the same vehicles, we also repair control units with the part numbers 1523004370, 98221FC210, 98221SJ000, 98221SJ001.

How does the repair of the 98221AN091 work?

For the repair of the 98221AN091, first have the fault memory read out and enclose the log. Then disconnect the battery and remove the control unit. Afterwards, create a repair order online.

Pack the unit carefully and send it in. Airbag24 checks it on the test bench, replaces defective components, deletes stored crash data and carries out a function test.

Airbag24 processes the unit in 3–4 working days. Afterwards, your own unit is returned. 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 98221AN091 get to Airbag24?

You send the control unit 98221AN091 in as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back via UPS.

Put the printed repair order into the parcel and pack the unit shockproof.