Airbag control unit with part number 98820-1MB0C

What does the airbag control unit 98820-1MB0C do?

The control unit 98820-1MB0C controls the restraint system (SRS) at Infiniti. It collects the measurements from the crash sensors, selects the appropriate airbags and seatbelt pretensioners in an accident, and reports faults via the airbag warning light.

An impact is assessed within fractions of a second; after that the unit decides on triggering.

After an accident crash data is stored, and in this state the unit locks itself.

Why does the control unit 98820-1MB0C fail?

On the 98820-1MB0C the most common cause is crash data stored after an accident, even if no airbag was triggered at all. A normal diagnostic tool does not delete it. Other causes are aged components, cold solder joints, moisture and corrosion at plugs, and voltage spikes such as with a weak battery or a jump start.

Airbag24 removes the crash data during the repair, along with all other checks.

Cold solder joints form poor connections, and corrosion on plugs disturbs the contact.

Aged electronics are a risk factor of their own, and voltage spikes additionally stress the circuit.

How can you tell that the 98820-1MB0C is defective?

On the 98820-1MB0C a defect first shows up through the airbag warning light, which lights up permanently or intermittently. In addition come an error message, a diagnostic tool without connection to the control unit, and a fault memory that cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then not trigger reliably.

The airbag warning light in the instrument cluster is the clearest sign, because it indicates the defect itself. Do not ignore this hint, because it concerns the entire restraint system.

Have the finding clarified promptly if one of the other irregularities is added.

Which vehicles is the 98820-1MB0C fitted in?

The assignment lists the Infiniti vehicles in which this unit was installed. The 98820-1MB0C is fitted in these vehicles: Infiniti M37 Y51 (2010-2013).

The models listed at a glance:

• Infiniti M37 Y51 (2010-2013)

A comparison of the part number on the label with this page ensures that you have the correct unit, nothing more. Whether the control unit itself is defective or a plug or cable is the cause is clarified by a fault memory read out beforehand.

For the same vehicles, we also repair control units with the part numbers 98820-1MA1C.

How does the repair of the 98820-1MB0C work?

First the fault memory is read out, and the log goes with the parcel. Then you disconnect the battery before removing the 98820-1MB0C. You create the repair order online and send the unit in well packed; at Airbag24, checking, repairing and testing take 3–4 working days as a rule.

At Airbag24 the control unit goes onto the test bench. Defective components are replaced, the crash data is deleted, and then a function test follows. Your own unit then returns 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 98820-1MB0C get to Airbag24?

The 98820-1MB0C is sent as a parcel, or collected by UPS for an extra charge. After the repair, the return is made by UPS.

In the parcel lies the printed repair order, and the unit is packed shock-proof.