Airbag control unit with part number 98820-1MH1A

What does the airbag control unit 98820-1MH1A do?

The airbag control unit 98820-1MH1A coordinates the restraint system (SRS) for Infiniti. It evaluates the signals from the crash sensors and determines in a crash, within milliseconds, which airbags and seatbelt pretensioners are triggered.

It monitors the system continuously. It shows faults via the airbag warning light in the instrument cluster.

After a crash the unit stores crash data and locks itself. Only the repair lifts this lock.

Why does the control unit 98820-1MH1A fail?

The most common cause with the 98820-1MH1A is crash data stored after an accident, even if no airbag has deployed; it cannot be erased with a normal diagnostic tool. Other causes are aged electronic components, moisture and corrosion on plug connections, cold solder joints and voltage spikes.

The crash data stays in memory even if the vehicle continues to run normally after the accident. Whether any of the other causes applies only becomes clear through testing.

How can you tell that the 98820-1MH1A is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently if something is wrong with the 98820-1MH1A. There may also be a fault message in the instrument cluster, no connection between the diagnostic tool and the control unit, and a fault memory that cannot be cleared.

The warning light shows the defect. In an emergency, airbags and seatbelt pretensioners may not deploy, and you must not rely on them doing so.

Which vehicles is the 98820-1MH1A fitted in?

The control unit 98820-1MH1A is fitted in these vehicles: Infiniti M37 Y51 (2010-2013).

The vehicles at a glance:

• Infiniti M37 Y51 (2010-2013)

Compare the part number on the label of the removed unit with this page; this only confirms that it is the right unit. Have the fault memory read out beforehand. Only that shows whether the control unit is defective or a connector 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 98820-1MH1A work?

For the 98820-1MH1A, first have the fault memory read out and attach the log. Then disconnect the battery and only then remove the control unit. Next, create a repair order online and send the unit in well packed. At Airbag24, testing, repair and functional test usually take 3–4 working days.

Airbag24 checks the unit on the test bench, replaces defective components, erases the stored crash data and carries out a functional test. The unit is then 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 98820-1MH1A get to Airbag24?

You send the control unit 98820-1MH1A as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

The printed repair order goes in the parcel, and you pack the unit shockproof.