Airbag control unit with part number 98221SJ660

What does the airbag control unit 98221SJ660 do?

The airbag control unit 98221SJ660 belongs to the restraint system (SRS) of Subaru and evaluates the sensor signals. In an accident it decides within milliseconds which airbags and seatbelt pretensioners fire. During operation it monitors the system and reports detected faults via the airbag warning light.

After an accident the unit stores crash data and locks itself. Beyond that, it accesses sensors, wiring and the power supply to check the function.

Why does the control unit 98221SJ660 fail?

Stored crash data is the most common cause, even if no airbag has fired, and a normal diagnostic tool cannot delete it. Aged electronic components, cold solder joints, moisture and corrosion at plug connections, as well as voltage spikes, are further possibilities.

The consequences of an accident for the control unit are hardly visible from the outside, even when the airbags remained untouched.

The other causes are everyday effects. Electronics age, solder joints can go cold, and moisture causes plug connections to corrode.

Voltage spikes occur, for example, with a weak battery or when a jump start is connected.

How can you tell that the 98221SJ660 is defective?

The airbag warning light in the instrument cluster comes on permanently or intermittently, and an error message appears in the instrument cluster. In addition, the diagnostic tool cannot establish a connection to the control unit, and the fault memory cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

The light is a signal from the system itself. Trust that it does not light up without reason, and have the fault memory read out.

A failure does not always show itself right away, and in case of doubt the diagnostic tool provides the decisive hint. Anyone who postpones the read-out loses valuable time in finding the cause.

Which vehicles is the 98221SJ660 fitted in?

The control unit 98221SJ660 works in these vehicles: Subaru Forester SK (2018-2021) and SK Facelift (from 2021).

You can see the assignment in the list:

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

Comparing the part number on the label with this page only confirms the correct unit. Therefore have the fault memory read out without fail. Only this result shows whether the control unit itself is defective or whether a plug or cable causes the fault.

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

How does the repair of the 98221SJ660 work?

First have the fault memory read out and enclose the log, then disconnect the battery and only then remove the control unit 98221SJ660. Then create a repair order online and send the unit in well packed. Airbag24 checks, repairs and tests it, deletes the crash data, and then sends your own unit back.

The order serves safety and is therefore binding.

On the test bench, Airbag24 examines the unit. Defective components are replaced, followed by a function test. This time applies only to the checking, repairing and testing at Airbag24; processing generally takes 3–4 working days.

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 98221SJ660 get to Airbag24?

You send the unit to Airbag24 as a parcel or book a UPS collection for an extra charge. After the repair Airbag24 sends the control unit 98221SJ660 back to you by UPS.

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