Airbag control unit with part number 98820-4JA0A

What does the airbag control unit 98820-4JA0A do?

The airbag control unit 98820-4JA0A coordinates the entire restraint system in Nissan. From the values of the crash sensors, it calculates within milliseconds which airbags and seatbelt pretensioners fire in an accident.

It checks the system for faults continuously and shows malfunctions via the airbag warning light in the instrument cluster. In this way, a defect can be recognised before it becomes a problem in an emergency.

After an accident, it stores crash data and then locks itself. This lock is part of how the device works.

Why does the control unit 98820-4JA0A fail?

The most common cause is stored crash data after an accident, even if no airbag has deployed. Other factors include ageing electronics, dry solder joints, moisture with corrosion on plug connectors, and voltage spikes.

A normal diagnostic tool cannot erase this data. Airbag24 deletes it during the repair, so that the unit is clear of it afterwards.

The other causes relate to age and environment. Components wear out, solder joints can give way, and damp affects the plug connectors.

Voltage spikes, for example from a weak battery or connecting a jump start, can also affect the electronics.

How can you tell that the 98820-4JA0A is defective?

The airbag warning light in the instrument cluster lights up constantly or intermittently. A fault message accompanies it in the instrument cluster, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared.

Such a state means that airbags and seatbelt pretensioners may not deploy in an emergency. The control unit itself displays the fault, so the message is not something to dismiss.

Faults are thus visible rather than hidden. The warning light is the first indication to respond to, before the system is needed in an emergency.

Which vehicles is the 98820-4JA0A fitted in?

The vehicle registration document is the most reliable way to check whether a vehicle is affected. The 98820-4JA0A is fitted in these vehicles: Nissan Navara D23 (2015-2020).

The vehicles for which this part number is recorded can be found here:

• Nissan Navara D23 (2015-2020)

Comparing the part number on the label with this page only confirms that you have the right unit in front of you. Also have the fault memory read out, because only this result shows whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 0 285 015 304, 98820 6KB0A, 98820 EB01D, 988204KJ1A.

How does the repair of the 98820-4JA0A work?

First have the fault memory read out and attach the log, then disconnect the battery and remove the control unit. Then create a repair order online and send the unit in well packed.

At Airbag24, the unit is checked on the test bench, defective components are repaired, the crash data is erased and a function test carried out.

Airbag24 needs 3–4 working days for checking, repairing and testing as a rule. After that, your own unit is sent 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 98820-4JA0A get to Airbag24?

You send the control unit 98820-4JA0A to Airbag24 as a parcel or book a UPS collection for an extra charge. Airbag24 sends it back by UPS after the repair.

Put the printed repair order into the parcel and pack the unit shock-resistant.