Airbag control unit with part number 98820-1MA0C

What does the airbag control unit 98820-1MA0C do?

The airbag control unit 98820-1MA0C controls the restraint system (SRS) for Infiniti. It processes the signals from the crash sensors, selects the airbags and seatbelt pretensioners to trigger in an accident within milliseconds, and monitors the system permanently.

Faults are reported by the unit via the airbag warning light in the instrument cluster. This lets you know in the vehicle when something is wrong.

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

Why does the control unit 98820-1MA0C fail?

Stored crash data is the most common cause: it remains in the control unit after an accident, even if no airbag has deployed, and cannot be erased with a normal diagnostic tool. Further causes include aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

The stored crash data result from an impact and stay in the unit until they are removed during the repair. That is why they are checked first in the event of a failure.

The other causes tend to develop over a longer period. Moisture and corrosion attack the contacts, solder joints can give way, and voltage spikes act on the electronics immediately.

How can you tell that the 98820-1MA0C is defective?

A defect shows up on the airbag warning light in the instrument cluster when it stays on permanently or intermittently. Likewise, a fault message in the instrument cluster, a diagnostic tool without a connection to the control unit, or a fault memory that cannot be cleared point to a problem. In an emergency, airbags and seatbelt pretensioners may then possibly not deploy.

The airbag warning light in the instrument cluster comes on as soon as the control unit detects a fault. It is therefore the most important signal you perceive in everyday use.

A diagnostic tool that cannot establish a connection is a sign you should not disregard. It points to a problem that requires an examination.

Which vehicles is the 98820-1MA0C fitted in?

With us, this part number is assigned to vehicles. The control unit 98820-1MA0C is fitted in these vehicles: Infiniti M37 Y51 (2010-2013).

The assignment is shown in the following overview.

• Infiniti M37 Y51 (2010-2013)

Compare the part number on the label of the removed unit with this page, so that it is certain you have the correct unit. Have the fault memory read out beforehand. Only this result shows whether the control unit is defective or 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 98820-1MA0C work?

You read out the fault memory first and attach the log, before you disconnect the battery. Only then do you remove the control unit, create a repair order online and send the well-packed unit in. Airbag24 checks the unit, replaces defective components, deletes the crash data, runs a function test and sends the unit back to you. Processing usually takes 3–4 working days.

This time applies only to checking, repairing and testing at Airbag24. The steps for removal and shipping are not included.

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 98820-1MA0C get to Airbag24?

You send the control unit 98820-1MA0C in as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it by UPS.

Place the printed repair order in the parcel and pack the control unit shockproof.