Airbag control unit with part number 98820-9NJ2A

What does the airbag control unit 98820-9NJ2A do?

The airbag control unit 98820-9NJ2A is the central control unit of the SRS restraint system in Infiniti. It evaluates the crash sensors, determines in an accident which airbags and seatbelt pretensioners are triggered, and monitors the entire system during operation.

The evaluation happens in a very short time, because the airbags must deploy within moments of an impact. During normal operation, the unit works unnoticed in the background.

Faults are signalled via the airbag warning light in the instrument cluster. After an accident, the control unit stores crash data and then locks itself.

Why does the control unit 98820-9NJ2A fail?

The most common cause is crash data stored in the unit after an accident, even if no airbag has deployed. A normal diagnostic tool cannot reach it. Further causes are ageing components, cold solder joints, moisture on connectors and voltage spikes.

Crash data is a record of the event in the unit, not visible damage. Airbag24 deletes it as part of the repair of the 98820-9NJ2A.

The other causes are hard to spot. Electronics age, solder joints may have gone cold, and moisture acts on the contacts. Voltage spikes, for example from a weak battery or a jump start, additionally stress the on-board electrical system.

How can you tell that the 98820-9NJ2A is defective?

A defect shows up as the airbag warning light in the instrument cluster, which stays on permanently or only intermittently. Other signs are fault messages in the instrument cluster, no connection to the diagnostic tool, and a fault memory that cannot be cleared.

If you notice these signs, have the system examined. The warning light shows the fault directly, and airbags and seatbelt pretensioners may then not deploy in an emergency.

A glance at the instrument cluster is enough to see the warning.

Which vehicles is the 98820-9NJ2A fitted in?

The control unit 98820-9NJ2A is fitted in these vehicles: Infiniti QX60 L50 Facelift (2015-2021).

You will find the list of vehicles recorded for this part number here:

• Infiniti QX60 L50 Facelift (2015-2021)

Check whether the part number on the removed unit matches this page, ideally directly on the label. That only confirms that it is the correct unit.

Have the fault memory read out beforehand, because only the 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 285012283, 98820-9NB0A.

How does the repair of the 98820-9NJ2A work?

Processing at Airbag24 usually takes 3–4 working days. There the unit is checked, repaired and tested before it is returned.

Your procedure starts with having the fault memory read out and attaching the log. Then you disconnect the battery and only afterwards remove the control unit. Finally, create a repair order online and send the unit in well packed.

At Airbag24, defective components are replaced, stored crash data is deleted and a function test is carried out. 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 98820-9NJ2A get to Airbag24?

You send the unit 98820-9NJ2A as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns the control unit 98820-9NJ2A by UPS.

The printed repair order belongs in the parcel. Pack the unit shockproof.