Airbag control unit with part number 98820-4RA0A

What does the airbag control unit 98820-4RA0A do?

The airbag control unit 98820-4RA0A is the central unit that controls the restraint system (SRS) in the Nissan. It evaluates the crash sensors and decides in an accident, within milliseconds, whether the airbags and seatbelt pretensioners are triggered.

At the same time it monitors the system for faults. If it detects a malfunction, it reports it via the airbag warning light in the instrument cluster and stores it in the fault memory.

After an accident it secures crash data and then locks itself. This function belongs to occupant safety, which is why the unit must be checked with great care.

Why does the control unit 98820-4RA0A fail?

The most common cause is stored crash data, even if no airbag has deployed. Other causes include aged components, cold solder joints, moisture on plug connections with corrosion, and voltage spikes.

Such crash data cannot be removed with a conventional diagnostic tool. Airbag24 erases it during the repair.

The other causes arise from wear and environmental influences. Electronics age, solder joints can crack, and moisture attacks plug connections. Voltage spikes also affect the circuitry, for example during jump-starting.

How can you tell that the 98820-4RA0A is defective?

The airbag warning light in the instrument cluster indicates a defect in the 98820-4RA0A by staying on permanently or intermittently. In addition, a fault message appears in the instrument cluster, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared.

As long as these signs persist, the airbags and seatbelt pretensioners may not deploy in an emergency. A flickering light is also a warning sign that you should take seriously.

A prompt diagnosis will bring clarity.

Which vehicles is the 98820-4RA0A fitted in?

The 98820-4RA0A is fitted in these vehicles: Nissan Maxima A36 (2015-2023).

The list here shows the models with their years of construction.

• Nissan Maxima A36 (2015-2023)

Comparing the part number on the label of the removed unit with this page ensures that you have the correct unit. Please also have the fault memory read out in advance, because only this log 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 98820-3Y600, 98820-AV200, 98820-AV21A.

How does the repair of the 98820-4RA0A work?

First have the fault memory read out and enclose the log, then disconnect the battery and only then remove the control unit. Next, create an online repair order and send in the unit well packed. Processing at Airbag24 takes 3–4 working days.

The order of these steps must be observed for safety reasons. Airbag24 checks the unit, repairs defective components, erases the crash data and carries out a function test. The unit is then returned to you.

The stated time covers only testing, repair and function testing. 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 98820-4RA0A get to Airbag24?

You send the control unit 98820-4RA0A in as a parcel, or you arrange a UPS collection for an extra charge. Airbag24 returns it to you by UPS after the repair.

Include the printed repair order in the parcel and pad the unit shock-proof.