Airbag control unit with part number 98820-4RF0B

What does the airbag control unit 98820-4RF0B do?

The airbag control unit 98820-4RF0B forms the central control unit of the SRS restraint system of Nissan. It checks the signals from the crash sensors and, in an accident, triggers the appropriate airbags and seatbelt pretensioners within a few milliseconds.

While driving, it monitors the function of the entire system. If it detects a fault, it reports this via the airbag warning light in the instrument cluster.

After an accident it stores crash data and is locked afterwards.

Why does the control unit 98820-4RF0B fail?

The most common cause is crash data stored after an accident, even if no airbag was triggered. Other possible triggers are aged electronics, cold solder joints, moisture and corrosion on connectors, as well as voltage spikes, for example from a weak battery or when starting with a jump start.

A normal diagnostic tool cannot delete this crash data. During the repair at Airbag24 it is deleted.

The other causes concern the electronics and the contacts inside the unit. Only an examination shows which of them applies.

How can you tell that the 98820-4RF0B is defective?

The airbag warning light in the instrument cluster lights up permanently or only intermittently, and an error message appears on the display. In addition, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared.

In an emergency, airbags and seatbelt pretensioners may possibly not trigger if the control unit is faulty. The warning light is therefore a notice you should take seriously.

Have the condition checked promptly, even if the vehicle otherwise seems unremarkable.

Which vehicles is the 98820-4RF0B fitted in?

The control unit 98820-4RF0B from Nissan is fitted in these vehicles: Nissan Maxima A36 (2015-2023).

The overview lists the models for which this part number is on record.

• Nissan Maxima A36 (2015-2023)

Compare the number on the label of the removed unit with this page. This only confirms that it is the right unit. Have the fault memory read out beforehand, because only the result shows whether the control unit itself is defective or whether a connector 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 98820-4RF0B work?

First have the fault memory read out and attach the log. Then disconnect the battery and only then remove the control unit 98820-4RF0B. Processing at Airbag24 usually takes 3–4 working days.

Afterwards, create a repair order online and send in the well-packed unit.

There, the unit is checked, defective components are repaired, the stored crash data is deleted and a function test follows. 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 98820-4RF0B get to Airbag24?

You send the 98820-4RF0B as a package or book a UPS collection for an extra charge. After the repair, Airbag24 returns your own unit by UPS.

The printed repair order goes into the package, and the unit should be packed shock-proof.