Airbag control unit with part number 98221SJ650

What does the airbag control unit 98221SJ650 do?

The airbag control unit 98221SJ650 controls the airbags and seatbelt pretensioners of the restraint system in Subaru. It processes the measured values from the crash sensors and decides on triggering in a fraction of a second in an accident.

While driving, it continuously checks the connections and components of the system. If it detects a fault, it stores it and reports it via the warning light in the instrument cluster.

After an accident the control unit records crash data and locks itself.

Why does the control unit 98221SJ650 fail?

The most common cause for the 98221SJ650 is that crash data remains stored after an accident, even if no airbag has triggered. A normal diagnostic tool cannot erase it. In addition there are ageing components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery or a jump start.

The crash data remains in memory until Airbag24 removes it during the repair. An accident does not need to have triggered airbags for this to happen.

The other causes concern the electronics themselves and their connections. Corrosion and moisture attack contacts, cold solder joints can cause malfunctions, and voltage spikes load the circuit.

How can you tell that the 98221SJ650 is defective?

The airbag warning light in the instrument cluster lights up on the 98221SJ650 permanently or intermittently. An error message also appears in the instrument cluster, or the diagnostic tool receives no connection to the control unit, or the fault memory cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to trigger.

A light that keeps coming back is a clear signal from the system. It indicates that something is wrong in the control unit.

Have the indication checked promptly and do not dismiss it as a coincidence.

Which vehicles is the 98221SJ650 fitted in?

The control unit 98221SJ650 is fitted at Subaru in these vehicles: Subaru Forester SK (2018-2021) and SK Facelift (from 2021). The details refer to the assignment to this part number.

You will find the vehicles stored for this unit in the overview below.

• 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, so you know it is the correct unit. Nevertheless, read out the fault memory beforehand, because only the result shows whether the control unit itself 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 98221SJ650 work?

You first read out the fault memory and attach the log. Then disconnect the battery, remove the control unit 98221SJ650, create a repair order online and send the unit in well packed. Airbag24 needs 3–4 working days as a rule for checking, repairing and testing.

At Airbag24 the unit is examined on the test bench, defective components are repaired if necessary, and a function test follows. Stored crash data is erased in the process.

Afterwards your own unit is returned. 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 98221SJ650 get to Airbag24?

The control unit 98221SJ650 is either sent in as a parcel or handed over for an extra charge via a booked UPS collection. The return after the repair is made by UPS.

The printed repair order belongs in the parcel, and the unit is to be packed shockproof.