Airbag control unit with part number 98820-3JN0A

What does the airbag control unit 98820-3JN0A do?

The airbag control unit 98820-3JN0A manages the restraint system (SRS) of Infiniti. Its job is to evaluate the signals of the crash sensors, decide within milliseconds in an accident which airbags and seatbelt pretensioners fire, and keep the system under constant watch. It indicates faults via the airbag warning light.

The unit checks sensors, wiring and actuators during operation. What it classes as a fault, it stores in the fault memory.

After an accident the control unit secures crash data and locks itself.

Why does the control unit 98820-3JN0A fail?

With the 98820-3JN0A, the most common cause is stored crash data, which remains in the unit after an accident even if no airbag was triggered. A standard diagnostic tool cannot erase them. Further causes include aged electronic components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes, such as those from a weak battery or a jump start.

Airbag24 removes the crash data as part of the repair.

The remaining causes lie in the electronics and their connections. Components age, solder joints become vulnerable over time, and moisture or rust attack the plug contacts. Voltage spikes also strain the circuitry.

How can you tell that the 98820-3JN0A is defective?

On the 98820-3JN0A, a defect is noticed by the airbag warning light, which lights permanently or intermittently. Error messages, a missing diagnostic connection or a fault memory that cannot be cleared likewise point to a problem. Then airbags and seatbelt pretensioners may not trigger in an emergency.

• Airbag warning light in the instrument cluster, permanently or intermittently
• Error message in the instrument cluster
• Diagnostic tool has no connection to the control unit
• Fault memory cannot be cleared

The warning light in the instrument cluster is the most important notice the control unit gives itself. If it appears permanently or keeps reappearing, the vehicle needs an examination. Until then keep an eye on the indication.

Which vehicles is the 98820-3JN0A fitted in?

The control unit 98820-3JN0A is fitted in these vehicles: Infiniti QX60 L50 (2012-2015). Comparing the part number on the label of the unit with this page confirms that you have the correct unit.

The models recorded for this part number follow here:

• Infiniti QX60 L50 (2012-2015)

Have the fault memory read out in advance. Only the log shows whether the control unit itself is defective or whether a cable or plug is the cause. The label comparison does not do that.

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

How does the repair of the 98820-3JN0A work?

First have the fault memory read out and attach the log. Then disconnect the battery and only then remove the 98820-3JN0A. Afterwards create a repair order online and send the unit in well packed. Processing at Airbag24 takes 3–4 working days.

This sequence is about safety during removal.

Airbag24 checks the unit, repairs defective components, erases the crash data and carries out a functional test. Afterwards your own unit comes back 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 98820-3JN0A get to Airbag24?

You send the control unit 98820-3JN0A as a parcel, or you book a UPS collection for an extra charge. Airbag24 returns the unit by UPS after the repair.

The printed repair order goes into the parcel, and you pack the unit shockproof.