Airbag control unit with part number 98221SL000

What does the airbag control unit 98221SL000 do?

The airbag control unit 98221SL000 is the central control unit of the restraint system (SRS) for Subaru. It processes the crash sensor data and, in a crash, decides within milliseconds which airbags and seatbelt pretensioners are triggered.

It also monitors the system continuously. If it detects a fault, the airbag warning light in the instrument cluster shows it.

After an accident, it stores crash data and then locks itself.

Why does the control unit 98221SL000 fail?

The most common cause is crash data stored in the control unit after an accident, even if no airbag has deployed. A normal diagnostic tool cannot remove it. Other causes include aged electronics, cold solder joints, moisture with corrosion on plug connections, and voltage spikes.

Airbag24 removes the crash data during the repair. A unit holding such data therefore cannot be reset by ordinary means.

Aged components lose reliability over the years. Cold solder joints and moisture on the connectors disturb the signals, and voltage spikes from a weak battery or a jump start put a strain on the electronics.

How can you tell that the 98221SL000 is defective?

The airbag warning light stays on permanently or intermittently, an error message appears in the instrument cluster, and the diagnostic tool cannot connect to the control unit. In addition, the fault memory cannot be cleared.

• Airbag warning light on permanently or intermittently
• Error message in the instrument cluster
• Diagnostic tool without connection to the control unit
• Fault memory cannot be cleared

If these signs appear, the airbags and seatbelt pretensioners may not deploy in an emergency. The warning light shows the defect, so a prompt check is advisable.

Which vehicles is the 98221SL000 fitted in?

The control unit 98221SL000 is fitted in these Subaru vehicles: Subaru Forester SK Facelift (from 2021). Comparing the part number shows whether the unit belongs to your own car.

The list shows the vehicles in which this control unit was installed.

• Subaru Forester SK Facelift (from 2021)

Comparing the part number on the label of the removed unit with this page only confirms that you have the correct unit. Have the fault memory read out beforehand, as 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 1523004370, 98221FC210, 98221SJ000, 98221SJ001.

How does the repair of the 98221SL000 work?

First have the fault memory read out and attach the log. Then disconnect the battery and only afterwards remove the control unit. Create the repair order online and send in the well-packed unit. At Airbag24, testing, repairing and checking usually take 3–4 working days.

Airbag24 checks the unit on the test bench, repairs defective components, erases the crash data and carries out a function test. Then 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 98221SL000 get to Airbag24?

You send the unit as a parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 returns it by UPS.

The printed repair order goes into the parcel. Pack the control unit shock-resistant.