Airbag control unit with part number 98820-1MA0B

What does the airbag control unit 98820-1MA0B do?

The airbag control unit 98820-1MA0B controls the restraint system (SRS) of Infiniti. In an accident, it evaluates the signals from the crash sensors and decides within milliseconds which airbags and seatbelt pretensioners are triggered. It shows faults in the system via the airbag warning light.

While driving, the unit continuously checks the sensors, the firing circuits and the connections to the seatbelt pretensioners. Whether it triggers in an emergency depends on this evaluation, which is why the flawless condition of the control unit is so important.

After an accident, the control unit stores crash data and locks itself.

Why does the control unit 98820-1MA0B fail?

The most common causes are crash data stored after an accident, even if no airbag has deployed. Other causes include aged electronic components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes, for example from a weak battery or a jump start.

Crash data cannot be erased with a normal diagnostic tool. The control unit therefore remains conspicuous even when the rest of the equipment is working normally. Airbag24 deletes this data during the repair.

The other causes tend to develop gradually. Moisture and corrosion on connectors, aged components and cold solder joints gradually change how the unit behaves until an error message appears.

How can you tell that the 98820-1MA0B is defective?

The airbag warning light in the instrument cluster is on constantly or intermittently, and an error message appears in the instrument cluster. In addition, the diagnostic tool gets no connection to the control unit, and the fault memory cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

The warning light is the clearest sign in particular. If it lights up, you should have the cause clarified promptly. However, the display alone does not say anything about the cause; it only shows that the system has detected a fault.

Which vehicles is the 98820-1MA0B fitted in?

The control unit 98820-1MA0B is fitted in these vehicles: Infiniti M37 Y51 (2010-2013).

We have stored the assignment for the following models. Use it to check whether your vehicle is included:

• Infiniti M37 Y51 (2010-2013)

On the one hand, you can compare the part number on the label of the removed unit with this page. This only confirms that it is the right unit. On the other hand, have the fault memory read out before removal. Only this result shows whether the control unit is defective or whether 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 98820-1MA0B work?

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

Airbag24 checks the unit on the test bench, replaces defective components, deletes the stored crash data and carries out a function test. The unit is then returned to you. Checking, repairing and testing takes 3–4 working days at Airbag24 as a rule.

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 98820-1MA0B get to Airbag24?

You send the unit as a parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

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