Airbag control unit with part number 98221SJ580

What does the airbag control unit 98221SJ580 do?

The airbag control unit 98221SJ580 is the central control unit of the restraint system (SRS) in Subaru. It checks the signals from the crash sensors and decides in an accident, within milliseconds, whether airbags and seatbelt pretensioners are triggered.

It monitors the system continuously and shows faults via the airbag warning light.

After an accident it stores crash data and locks itself.

Why does the control unit 98221SJ580 fail?

The most common cause at the 98221SJ580 is crash data from an accident, even if no airbag has deployed, and a normal diagnostic tool cannot erase it. Additional possible causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

The crash data remains in the memory, regardless of whether an airbag actually deployed.

Electronics age over time, solder joints can be cold, and moisture attacks the contacts.

Voltage spikes, for example with a weak battery or when jump-starting, put additional strain on the unit.

How can you tell that the 98221SJ580 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently when the system detects a fault. In addition, the instrument cluster shows a fault message at the 98221SJ580, the diagnostic tool gets no connection to the control unit, and the fault memory cannot be cleared.

With these signs in particular, the rule is: in an emergency, airbags and seatbelt pretensioners may not deploy. Waiting is therefore not a good idea.

The warning light thus reflects the state of the system directly.

Which vehicles is the 98221SJ580 fitted in?

The vehicle list on this page shows you whether your car is among them. The control unit 98221SJ580 is fitted in these vehicles: Subaru Forester SK (2018-2021) and SK Facelift (from 2021).

These vehicles are known to us for this part number:

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

Before removal, compare the part number on the label with this page. This only ensures that it is the right unit, nothing more. Have the fault memory read out beforehand, because only this result shows whether the control unit is defective or a plug or 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 98221SJ580 work?

First have the fault memory read out and attach the log. Then disconnect the battery and only afterwards remove the control unit 98221SJ580.

Online you create a repair order; then send the well-packed unit in.

Airbag24 checks the unit on the test bench, replaces defective components, erases the stored crash data and carries out a function test. Testing, repairing and checking takes 3–4 working days at Airbag24 as a rule. Afterwards your own unit 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 98221SJ580 get to Airbag24?

You send the control unit 98221SJ580 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

Put the printed repair order into the parcel. Pack the unit shock-proof.