Airbag control unit with part number 98820-1MN1A

What does the airbag control unit 98820-1MN1A do?

The airbag control unit 98820-1MN1A controls the restraint system (SRS) for Infiniti. It evaluates the crash sensors, decides in an accident within milliseconds whether to trigger airbags and seatbelt pretensioners, and monitors the system permanently. It reports faults via the airbag warning light.

Monitoring covers sensors, cables and the triggering of the igniters. It runs without any action on your part.

After an accident, the unit stores crash data and locks itself. The lock is only lifted by the repair.

Why does the control unit 98820-1MN1A fail?

The most common cause with the 98820-1MN1A is stored crash data after an accident, even if no airbag was triggered. Other causes are aged electronics, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Crash data cannot be removed with a normal diagnostic tool. Airbag24 erases it during the repair.

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

How can you tell that the 98820-1MN1A is defective?

You can recognise a defect on the 98820-1MN1A by the airbag warning light in the instrument cluster, which lights up permanently or intermittently. In addition, the instrument cluster shows a fault message, and the diagnostic tool cannot find the control unit.

• airbag warning light lights up permanently or intermittently
• fault message in the instrument cluster
• diagnostic tool cannot establish a connection to the control unit
• fault memory cannot be cleared

If the control unit is defective, the airbags and seatbelt pretensioners may fail to trigger in an emergency. You should therefore not ignore the warning light.

Which vehicles is the 98820-1MN1A fitted in?

The 98820-1MN1A is fitted in these vehicles: Infiniti M37 Y51 (2010-2013).

The vehicles in which this unit is installed are listed in the overview below.

• Infiniti M37 Y51 (2010-2013)

Compare the number on the label of the removed unit with 98820-1MN1A on this page. This only shows that it is the right unit. Also have the fault memory read out, because only this log shows whether the control unit is defective or whether a plug or a 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 98820-1MN1A work?

Processing at Airbag24 usually takes 3–4 working days. Beforehand, you read out the fault memory and enclose the log. Then you disconnect the battery, only then remove the control unit, and create a repair order online.

You then send in the well-packed unit. Airbag24 checks it on the test bench, repairs defective components, erases stored crash data and carries out a function test. Afterwards, the 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 98820-1MN1A get to Airbag24?

You send in the control unit 98820-1MN1A as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

You put the printed repair order into the parcel, and you pack the unit shockproof.