Airbag control unit with part number 98820-1MF0A

What does the airbag control unit 98820-1MF0A do?

The airbag control unit 98820-1MF0A controls the restraint system (SRS) in Infiniti. It checks the crash sensors, selects the appropriate airbags and seatbelt pretensioners within milliseconds, and monitors the system without pause.

The unit detects faults itself and reports them via the airbag warning light in the instrument cluster.

After an accident it stores crash data and then locks itself.

Why does the control unit 98820-1MF0A fail?

Most often the cause is crash data stored after an accident, even if no airbag has been triggered. A normal diagnostic tool does not erase it. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes.

Crash data remains in the memory until it is deliberately erased. A standard diagnostic tool cannot achieve that.

The other causes act more gradually. Electronic components age, solder joints go cold, moisture and corrosion attack plug contacts, and voltage spikes arise, for example with a weak battery or jump-starting.

How can you tell that the 98820-1MF0A is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently. In addition there are a fault message in the instrument cluster, no contact with the diagnostic tool, and a fault memory that cannot be emptied. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

The airbag warning light in the instrument cluster is the clearest signal, because it reports every fault that the control unit detects. If it is lit, the restraint system is not in its usual state.

If the diagnostic tool cannot establish a connection, the cause lies in the control unit or its wiring. Please take such signs seriously.

Which vehicles is the 98820-1MF0A fitted in?

The airbag control unit 98820-1MF0A is fitted in these vehicles: Infiniti M37 Y51 (2010-2013).

The listing shows which vehicles belong to this part number.

• Infiniti M37 Y51 (2010-2013)

Comparing the part number on the label of the removed unit with this page merely confirms that you have the right unit. Nevertheless, have the fault memory read out beforehand, because only this log shows whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 98820-1MA1C.

How does the repair of the 98820-1MF0A work?

You have the fault memory read out, attach the log, disconnect the battery and only then remove the control unit 98820-1MF0A. Afterwards you create the repair order online and send in the unit; Airbag24 needs 3–4 working days as a rule for processing.

The order is mandatory for safety reasons: the control unit may only be removed after reading out and disconnecting the battery. Make sure it is well packed before sending it.

On the test bench Airbag24 checks the unit, replaces defective components, erases the crash data and carries out a function test. After that your own unit goes back 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 98820-1MF0A get to Airbag24?

You send your control unit 98820-1MF0A as a parcel or have it collected by UPS for an extra charge. Airbag24 returns it to you by UPS after the repair.

A shock-resistant packed unit goes into the parcel together with the printed repair order.