Airbag control unit with part number 98820-9NJ3A

What does the airbag control unit 98820-9NJ3A do?

The airbag control unit 98820-9NJ3A coordinates the SRS restraint system of Infiniti. It checks the signals of the crash sensors, calculates within milliseconds in an impact which airbags and seatbelt pretensioners are triggered, and monitors the entire system. It shows faults via the airbag warning light.

While driving, the monitoring runs in the background without a break. The unit checks sensors, wiring and triggering circuits, and stores detected faults in the fault memory.

After an accident it stores crash data and locks itself. An unchecked fault memory after an incident therefore leaves open what is stored in the unit.

Why does the control unit 98820-9NJ3A fail?

The most common cause is crash data in the memory that was created after an accident, even if no airbag has deployed. Further causes are aged components, cold solder joints, moisture or corrosion at plugs, and voltage spikes, for example from a weak battery or jump-starting.

An ordinary diagnostic tool cannot remove this data. Airbag24 erases it during the repair. The following causes are also possible:

• aged electronic components
• cold solder joints
• moisture and corrosion at plug connectors
• voltage spikes, for example from a weak battery or jump-starting

Which of these causes actually applies only becomes clear when the unit is examined.

How can you tell that the 98820-9NJ3A is defective?

The airbag warning light in the instrument cluster stays on permanently or lights up intermittently. In addition, an error message appears in the instrument cluster, the diagnostic tool does not find the control unit, or the fault memory cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

The warning light reports the defect as soon as the control unit notices it, and it should not be ignored. Even if the vehicle continues to drive normally, this does not change the situation.

Please have the warning light checked promptly, because a lack of contact with the diagnostic tool is also a sign of a fault.

Which vehicles is the 98820-9NJ3A fitted in?

The 98820-9NJ3A is fitted in vehicles: Infiniti QX60 L50 Facelift (2015-2021). This assignment covers the vehicles that we have recorded so far.

This overview shows which vehicles are known to us for this part number:

• Infiniti QX60 L50 Facelift (2015-2021)

Comparing the part number on the label of the removed unit with this page identifies the correct unit. Whether the unit itself is defective, or whether a plug or cable causes the fault, only the fault memory will show. Therefore have it read out before removal.

For the same vehicles, we also repair control units with the part numbers 285012283, 98820-9NB0A.

How does the repair of the 98820-9NJ3A work?

First have the fault memory read out, then disconnect the battery. Only after that do you remove the control unit. Next, create the repair order online, attach the log and pack the unit well.

At Airbag24, the unit is checked on the test bench, defective components are replaced and the crash data is erased. A function test follows. Checking, repairing and testing take 3–4 working days 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 98820-9NJ3A get to Airbag24?

Either you send the unit yourself as a parcel, or you book a UPS collection for an extra charge. After the repair, the unit is returned to you by UPS.

Put the printed repair order into the parcel and pack the control unit shockproof.