Airbag control unit with part number 98221SJ360

What does the airbag control unit 98221SJ360 do?

The airbag control unit 98221SJ360 forms the central control of the restraint system (SRS) in the Subaru vehicle. In a crash, it evaluates the crash sensor signals and determines within milliseconds which airbags and seatbelt pretensioners are triggered.

It monitors the system continuously and reports deviations via the airbag warning light in the instrument cluster.

After an accident, the unit stores crash data and locks itself. During normal driving nothing of this is visible, but a diagnosis shows it.

Why does the control unit 98221SJ360 fail?

Stored crash data is the most common cause, even if no airbag was triggered in the accident; a standard diagnostic tool cannot erase it. Other causes are aged electronic components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes.

This data remains in the unit, and an attempt to erase it with the diagnostic tool remains unsuccessful. The fault therefore lies within the control unit itself.

The other causes concern the electronics themselves. Components age, solder joints can loosen, and moisture or corrosion attack plug connections.

How can you tell that the 98221SJ360 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently. Additionally, there is an error message, the diagnostic tool fails to establish a connection, and the fault memory cannot be cleared.

• Airbag warning light on permanently or intermittently
• Error message in the instrument cluster
• Diagnostic tool does not connect to the control unit
• Fault memory cannot be cleared

In an emergency, airbags and seatbelt pretensioners may fail to deploy. A check is therefore worth doing quickly.

Which vehicles is the 98221SJ360 fitted in?

The details are based on our assignment to this part number. The control unit 98221SJ360 is fitted in these vehicles: Subaru Forester SK (2018-2021) and SK Facelift (from 2021).

The vehicles recorded so far are shown in this overview:

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

A comparison of the part number on the label with this page ensures that you have the right unit. Have the fault memory read out beforehand: only that 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 1523004370, 98221FC210, 98221SJ000, 98221SJ001.

How does the repair of the 98221SJ360 work?

First, have the fault memory read out and attach the log; then disconnect the battery, and only after that remove the control unit. Next, create a repair order online and send in the well-packed unit. Processing at Airbag24 usually takes 3–4 working days.

At Airbag24, the arrival of the unit is followed by the check on the test bench, the repair of defective components, the erasure of crash data and a function test. The customer's own unit then returns to them.

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 98221SJ360 get to Airbag24?

You send the unit as a parcel, or book a UPS collection for an extra charge. The return after the repair is made by UPS.

Put the printed repair order in the parcel; pack the unit shock-proof.