Airbag control unit with part number 98820-1MK0A

What does the airbag control unit 98820-1MK0A do?

In the Infiniti the airbag control unit 98820-1MK0A is responsible for the restraint system (SRS). It evaluates the crash sensors, decides within milliseconds in an accident which airbags and seatbelt pretensioners are triggered, and monitors the entire system continuously.

The unit displays faults via the airbag warning light in the instrument cluster. This light makes it visible when something is wrong in the restraint system.

After an accident the control unit stores crash data and locks itself. The term refers to the same component as the SRS control unit.

Why does the control unit 98820-1MK0A fail?

Stored crash data is the most common cause, and after an accident this applies even if no airbag has deployed. Further causes are aged electronics, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Crash data cannot be removed with a standard diagnostic tool, which is why Airbag24 erases it as part of the repair.

Aged electronic components, cold solder joints and moisture at plug connections are among the causes, as are voltage spikes, for example from a weak battery or a jump start.

How can you tell that the 98820-1MK0A is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently. In addition, a fault message appears in the instrument cluster, the diagnostic tool gets no connection to the control unit, and the fault memory cannot be cleared.

The light is the first sign you will notice, and the fault message supplements it.

If the restraint system is faulty, airbags and seatbelt pretensioners may fail to deploy in an emergency. The defect is therefore shown, not hidden; the warning light exists for exactly this purpose.

Which vehicles is the 98820-1MK0A fitted in?

The 98820-1MK0A is fitted in these vehicles: Infiniti M37 Y51 (2010-2013).

This assignment lists the vehicles in which this unit is installed:

• Infiniti M37 Y51 (2010-2013)

Compare the part number on the label of the removed unit with this page. This only establishes whether it is the correct unit. Have the fault memory read out beforehand. 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 98820-1MK0A work?

First have the fault memory read out and attach the log, then disconnect the battery. Only after that do you remove the control unit 98820-1MK0A, and create the repair order online. Processing at Airbag24 usually takes 3–4 working days.

You pack the unit well and send it in. Airbag24 checks it on the test bench, replaces defective components, erases the crash data and carries out a function test.

Your own 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 98820-1MK0A get to Airbag24?

You send the control unit 98820-1MK0A 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.