Airbag control unit with part number 98820-4RB0A

What does the airbag control unit 98820-4RB0A do?

The airbag control unit 98820-4RB0A coordinates the restraint system (SRS) of Nissan. It reads the crash sensors and determines in an accident which airbags and seatbelt pretensioners are triggered.

It checks the system continuously and shows faults via the airbag warning light.

After an accident, it stores crash data and locks itself.

Why does the control unit 98820-4RB0A fail?

The most common cause is crash data stored in the unit after an accident, even if no airbag triggered. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plugs, and voltage spikes.

An ordinary diagnostic tool cannot remove this crash data from memory. Airbag24 erases the crash data during the repair.

Cold solder joints and aged components make the electronics unreliable over time. Moisture at plugs disturbs the contact, and voltage spikes, for example from a weak battery or a jump start, put additional strain on the unit.

How can you tell that the 98820-4RB0A is defective?

A defect on the 98820-4RB0A is shown mainly by the airbag warning light in the instrument cluster, which lights up permanently or intermittently. In addition, a fault message may appear, and the diagnostic tool then finds no connection to the control unit.

In this case the fault memory cannot be cleared, which is likewise a sign of a problem with the unit. As long as the fault persists, airbags and seatbelt pretensioners may fail to trigger in an emergency.

Take the warning light as a clear signal and have it checked promptly.

Which vehicles is the 98820-4RB0A fitted in?

The 98820-4RB0A is fitted in these vehicles: Nissan Maxima A36 (2015-2023).

The vehicles assigned are listed here:

• Nissan Maxima A36 (2015-2023)

Comparing the part number on the label of the removed unit with this page only confirms the identity of the unit. Have the fault memory read out beforehand as well, because only this shows whether the control unit itself is defective or whether a plug or cable is behind the fault.

For the same vehicles, we also repair control units with the part numbers 98820-3Y600, 98820-AV200, 98820-AV21A.

How does the repair of the 98820-4RB0A work?

First have the fault memory read out and enclose the log to the unit. Then disconnect the battery and only afterwards remove the control unit. Create a repair order online, then pack the unit and send it in. At Airbag24, checking, repairing and testing usually take 3–4 working days.

At Airbag24, the unit that has been sent in goes onto the test bench. Defective components are repaired, the stored crash data is erased and a function test is carried out.

Afterwards your own unit goes 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 98820-4RB0A get to Airbag24?

Your control unit 98820-4RB0A can be sent as a parcel, or you can book a UPS collection for an extra charge. After the repair, your own unit comes back by UPS.

The printed repair order goes into the parcel. Pack the unit shockproof so that it arrives undamaged.