Airbag control unit with part number 98221SL080

What does the airbag control unit 98221SL080 do?

The airbag control unit 98221SL080 coordinates the restraint system (SRS) of Subaru. Its task is to evaluate the signals from the crash sensors and, in an accident, to determine within milliseconds which airbags and seatbelt pretensioners trigger. After a crash, it stores crash data and locks itself.

Between accidents the unit keeps working in the background. It checks wiring, sensors and firing circuits and records irregularities.

If it finds a fault that affects the safety function, it activates the airbag warning light in the instrument cluster. That is precisely why this light is the driver's first visible hint.

Why does the control unit 98221SL080 fail?

With 98221SL080, the most common cause is crash data stored after an accident, even if no airbag has fired. An ordinary diagnostic tool cannot remove them. Other causes include aged components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

In the course of the repair, Airbag24 removes this data.

The other causes concern components and connections that can only be checked on the unit itself.

• aged components
• cold solder joints
• moisture and corrosion at the plug connections
• voltage spikes, for example from a weak battery or jump-starting

How can you tell that the 98221SL080 is defective?

On the 98221SL080, a defect shows up above all at the airbag warning light in the instrument cluster, which lights permanently or intermittently. Added to this are a fault message in the instrument cluster, a diagnostic tool without connection and a fault memory that cannot be cleared.

In an emergency, airbags and seatbelt pretensioners may then fail to trigger, which is why such signs require a prompt check. How pronounced the symptoms are depends on the individual case.

The warning light nevertheless remains a clear signal that the vehicle sends, and it should not be ignored.

Which vehicles is the 98221SL080 fitted in?

The control unit 98221SL080 is fitted in these vehicles: Subaru Forester SL (from 2024).

The assignment depends on more than the make. Model year, equipment and engine variant must match as well.

The overview in detail:

• Subaru Forester SL (from 2024)

Check the number on the label of the removed unit against this page, and then you know it is the right unit. Which cause the fault has is shown only by the fault memory. The read-out therefore comes first.

For the same vehicles, we also repair control units with the part numbers 98221SL000, 98221SL140.

How does the repair of the 98221SL080 work?

For the repair of the 98221SL080, have the fault memory read out; the protocol is attached to the unit later. Then disconnect the battery, remove the control unit and create a repair order online. At Airbag24, checking, repairing and testing are generally planned for 3–4 working days.

Pack the unit well and send it in. Airbag24 checks it on the test bench, replaces defective components and erases the stored crash data. After a function test, your own unit goes back to you.

The sequence is mandatory, because it affects safety during removal. 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 98221SL080 get to Airbag24?

One parcel is enough; alternatively, UPS collects the control unit 98221SL080 for an extra charge. After the repair, Airbag24 sends it back by UPS.

The printed repair order belongs in the shipment, and the unit needs shock-proof wrapping.