Airbag control unit with part number 98221SJ330

What does the airbag control unit 98221SJ330 do?

The airbag control unit 98221SJ330 is the central control unit of the restraint system (SRS) of Subaru. It processes the signals from the crash sensors, decides in an accident within milliseconds which airbags and seatbelt pretensioners are triggered, and monitors the system continuously.

The control unit reports faults via the airbag warning light in the instrument cluster. If you heed this indicator, you notice problems with the restraint system early enough to have them checked.

After an accident the unit stores crash data and locks itself. The sensor evaluation takes place in the background, without you having to intervene.

Why does the control unit 98221SJ330 fail?

The most common cause is crash data stored after an accident, even if no airbag has triggered. Further causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes in the vehicle electrical system.

Crash data cannot be removed with a standard diagnostic tool. As long as it is stored, the system shows this condition with every read-out.

Aged components and connections can give way before a failure occurs. That is why the cause does not always take effect immediately, but builds up over time.

How can you tell that the 98221SJ330 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently. In addition an error message appears in the instrument cluster, the diagnostic tool cannot reach the control unit, and the fault memory cannot be cleared. With these signs, airbags and seatbelt pretensioners may not trigger in an emergency.

The warning light is the indication that the system has detected a fault. The fact that it only lights up intermittently does not mean the fault has been resolved.

A missing connection to the diagnostic tool may come from the control unit, but it does not have to. Only the read-out of the fault memory shows the cause.

Which vehicles is the 98221SJ330 fitted in?

The control unit 98221SJ330 is fitted in these vehicles: Subaru Forester SK (2018-2021) and SK Facelift (from 2021).

Below you will find the models that are stored with this control unit in our data.

• 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. This only ensures that it is the right unit. Also have the fault memory read out before removal, because only this result shows whether the control unit is defective or a plug 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 98221SJ330 work?

First have the fault memory read out and enclose the log. Then disconnect the battery and only afterwards remove the control unit. Next, create a repair order online and send the unit off well packed.

This sequence is mandatory for your safety and must not be swapped. The unit is removed only once the battery has been disconnected from the power supply.

Airbag24 checks the unit on the test bench, replaces defective components and erases stored crash data. A function test follows, and Airbag24 typically needs 3–4 working days for this. 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 98221SJ330 get to Airbag24?

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

Place the printed repair order in the parcel and pack the control unit shock-proof.