Airbag control unit with part number 98820-1MC0A

What does the airbag control unit 98820-1MC0A do?

The 98820-1MC0A is the airbag control unit of the restraint system (SRS) of Infiniti. It evaluates the crash sensors, works out within milliseconds which airbags and seatbelt pretensioners are triggered, and checks the system continuously. If it detects a fault, it reports it via the airbag warning light.

After an accident it stores crash data and locks itself.

In the background it checks its signals without interruption, so that the decision is made without hesitation in an emergency.

Why does the control unit 98820-1MC0A fail?

The most common cause is a memory entry from an accident: crash data remains stored, even if no airbag has deployed. Further causes in brief:

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

A normal diagnostic tool cannot access the crash data.

Which of these points applies in the individual case is determined only by fault finding.

How can you tell that the 98820-1MC0A is defective?

A defect on the 98820-1MC0A becomes visible through the airbag warning light, which lights up permanently or appears from time to time, and through an error message in the instrument cluster. The diagnostic tool gets no connection to the control unit, and the fault memory cannot be cleared. As long as these signs persist, airbags and seatbelt pretensioners may possibly not trigger in an emergency.

These signs are messages from the system itself, not mere assumptions. A check is therefore the right next step.

Even if the vehicle drives unremarkably in everyday use, the warning remains a finding that you should have investigated.

Which vehicles is the 98820-1MC0A fitted in?

The 98820-1MC0A is fitted in these vehicles: Infiniti Q70 Y51 (2010-2013) and Y51 Facelift (2013-2022).

Here are the vehicles recorded for this part number:

• Infiniti Q70 Y51 (2010-2013)
• Infiniti Q70 Y51 Facelift (2013-2022)

Compare the part number on the label of the removed unit with this page; this only confirms that it is the correct unit. Have the fault memory read out before you remove the unit. This log shows whether the control unit is affected or whether plugs and cables play a role.

For the same vehicles, we also repair control units with the part numbers 285012561, 988206AE0A.

How does the repair of the 98820-1MC0A work?

First read out the fault memory and enclose the log. Then disconnect the battery, remove the control unit and create a repair order online. You send in the well-packed unit; Airbag24 checks it, replaces defective components, deletes the crash data and tests the function, after which your own unit is returned.

The sequence is not negotiable, because safety during removal depends on it.

Processing at Airbag24 usually takes 3–4 working days and covers only checking, repair and testing.

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 98820-1MC0A get to Airbag24?

You send the control unit as a parcel or book a UPS collection for an extra charge. After the repair Airbag24 returns your own unit to you by UPS.

The printed repair order goes into the parcel, and the unit is packed shockproof.