Airbag control unit with part number 98221SJ041

What does the airbag control unit 98221SJ041 do?

The airbag control unit 98221SJ041 controls the restraint system (SRS) in the Subaru. From the signals of the crash sensors it calculates whether and which airbags and seatbelt pretensioners are triggered in an accident.

In addition, the unit checks the components of the system constantly. If it finds an irregularity, the airbag warning light in the instrument cluster lights up and the fault is stored.

After an accident it records crash data and then locks itself. Because it decides on the triggering, its function is of great importance for the occupants.

Why does the control unit 98221SJ041 fail?

Stored crash data is the most common cause, even if no airbag was deployed in the accident. In addition there are aged electronics, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery or a jump start.

An ordinary diagnostic tool cannot erase the crash data. It remains in the unit and is removed by Airbag24 during the repair.

The other causes are linked to ageing and the environment. Components wear out, solder joints can stay cold, and moisture causes corrosion on contacts. Voltage spikes put additional strain on the electronics.

How can you tell that the 98221SJ041 is defective?

A defect in the 98221SJ041 shows up through the airbag warning light, fault messages in the instrument cluster and faults during diagnosis. A fault memory that cannot be cleared is also a clear sign.

• Airbag warning light in the instrument cluster stays on permanently
• Airbag warning light in the instrument cluster comes on intermittently
• Fault message in the instrument cluster
• Diagnostic tool does not establish a connection to the control unit
• Fault memory cannot be cleared

With such signs, airbags and seatbelt pretensioners may fail to trigger in an emergency. A prompt check is therefore advisable.

Which vehicles is the 98221SJ041 fitted in?

The 98221SJ041 is fitted in these vehicles: Subaru Forester SK (2018-2021) and SK Facelift (from 2021).

The list shows the affected models and years of construction.

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

Comparing the part number on the label of the removed unit with this page only confirms that it is the right unit. Whether the control unit is defective or whether a plug or cable is the cause is clarified by the fault memory. Have it read out before removal.

For the same vehicles, we also repair control units with the part numbers 1523004370, 98221FC210, 98221SJ000, 98221SJ001.

How does the repair of the 98221SJ041 work?

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

Airbag24 checks the unit, repairs defective components, erases the stored crash data and carries out a function test. Afterwards the unit is returned to you.

Processing takes 3–4 working days, and this time covers only checking, repairing and testing. 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 98221SJ041 get to Airbag24?

You can send the control unit 98221SJ041 as a parcel or have it collected by UPS for an extra charge. The return after the repair is also made by UPS.

Put the printed repair order in the parcel and pack the unit shockproof.