Airbag control unit with part number 98221FG120

What does the airbag control unit 98221FG120 do?

The airbag control unit 98221FG120 is the central control unit of the restraint system (SRS) of Subaru. It processes the readings from the crash sensors, decides within a few milliseconds in a collision whether airbags and seatbelt pretensioners are triggered, and checks the system continuously. After an accident it stores crash data and locks itself.

The unit reports faults via the airbag warning light in the instrument cluster. Monitoring runs throughout driving, so irregularities are detected promptly.

The control unit works together with sensors, wiring and the display. A fault in any of these parts can therefore show up in the control unit.

Why does the control unit 98221FG120 fail?

The most common cause in the 98221FG120 control unit is crash data stored after an accident, even if no airbag has deployed. A normal diagnostic tool cannot erase this data. Aged components and moisture at plug connections are also possible causes.

The crash data is held in the memory of the control unit itself, and the fault indication remains visible until the unit has been repaired.

The other causes mainly affect the electronics. Aged components, cold solder joints and corrosion can trigger faults, and voltage spikes, for example from a weak battery or from jump-starting, place additional strain on the circuitry.

How can you tell that the 98221FG120 is defective?

The airbag warning light in the instrument cluster lights up on the 98221FG120 control unit permanently or intermittently as soon as a fault is present. A fault message also appears in the instrument cluster. If the diagnostic tool cannot connect to the control unit and the fault memory cannot be cleared, airbags and seatbelt pretensioners may not trigger in an emergency.

The light is therefore not a random finding but a signal that the system has detected a fault. Only the fault memory check reveals the cause behind it.

Which vehicles is the 98221FG120 fitted in?

The control unit 98221FG120 is fitted in: Subaru Impreza GH (2007-2014).

The vehicles assigned to this part number are listed below.

• Subaru Impreza GH (2007-2014)

Comparing the part number on the label of the removed unit with this page makes sure you have the right unit in front of you. Whether the control unit is actually defective or a connector or wire is causing the fault is shown only by reading out the fault memory beforehand.

For the same vehicles, we also repair control units with the part numbers 98221FG000, 98221FG040, 98221FG060, 98221FG070.

How does the repair of the 98221FG120 work?

At Airbag24 the submitted control unit 98221FG120 is checked on the test bench, defective components are replaced and a functional test follows. Processing usually takes 3–4 working days.

Beforehand, have the fault memory read out and enclose the log. Then disconnect the battery and only afterwards remove the control unit. Create a repair order online and send in the well-packed unit.

Airbag24 erases stored crash data during the repair, after which your own unit is returned 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 98221FG120 get to Airbag24?

You send the control unit 98221FG120 as a parcel or book UPS collection for an extra charge. After the repair Airbag24 returns the unit to you by UPS.

Put the printed repair order into the parcel and pack the unit shock-proof.