Airbag control unit with part number 98221AN00C

What does the airbag control unit 98221AN00C do?

The airbag control unit 98221AN00C controls the restraint system (SRS) of Subaru. In a crash it decides within milliseconds which airbags and seatbelt pretensioners are triggered. It also monitors the system continuously and shows faults via the airbag warning light.

To do this, it processes the measured values from the sensors in the vehicle. The evaluation runs in the background while you drive.

After a crash, crash data is stored in the unit, which then locks itself.

Why does the control unit 98221AN00C fail?

On the 98221AN00C, the most common cause is stored crash data, even if no airbag was triggered. Aged components, moisture at plug connectors and voltage spikes are also possible causes.

Crash data cannot be erased with a normal diagnostic tool. Airbag24 erases it during the repair.

The other causes relate to the technology inside the unit and its surroundings. Components age, cold solder joints occur, and moisture or corrosion damages plug connectors.

Voltage spikes also belong here, for example from a weak battery or a jump start.

How can you tell that the 98221AN00C is defective?

A defect on the 98221AN00C becomes apparent through the airbag warning light in the instrument cluster, if it lights up permanently or intermittently. A fault message in the instrument cluster, a diagnostic tool without a connection, or a fault memory that cannot be cleared also belong here. In this state, airbags and seatbelt pretensioners may not trigger in an emergency.

The light is the warning signal the vehicle gives directly. If it stays on, have the system checked.

The light going out again does not mean the entry has disappeared from the memory.

Which vehicles is the 98221AN00C fitted in?

The control unit 98221AN00C is used in these vehicles: Subaru Forester SK Facelift (from 2021) and SK (2018-2021). All details refer to the make Subaru.

The vehicles in detail:

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

Comparing the part number on the label with this page only confirms that the unit is the right one. Before removal, have the fault memory read out. Only this log 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 98221-SJ370, 98221AN00A, 98221AN00D, 98221AN00E, 98221AN01A, 98221AN01D.

How does the repair of the 98221AN00C work?

For the 98221AN00C, first have the fault memory read out and attach the log, then disconnect the battery and remove the control unit. Airbag24 usually processes the unit within 3–4 working days.

Then create a repair order online and send the unit off well packed. Airbag24 checks the unit on the test bench, replaces defective components, erases stored crash data and carries out a function test. Your own unit is then returned 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 98221AN00C get to Airbag24?

You send the control unit 98221AN00C in as a parcel, or you book a UPS collection for an extra charge. After the repair it comes back to you by UPS.

Enclose the printed repair order with the parcel and pack the unit shock-proof.