Airbag control unit with part number 98820-4FA0B

What does the airbag control unit 98820-4FA0B do?

The airbag control unit 98820-4FA0B is the central electronics of the restraint system in Nissan vehicles. It processes the readings from the crash sensors, switches the airbags and seatbelt pretensioners on in a crash, and monitors the system without interruption.

If it detects a fault, the airbag warning light in the instrument cluster comes on. After an accident it stores crash data and then locks itself.

Why does the control unit 98820-4FA0B fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed. A normal diagnostic tool cannot remove it, but Airbag24 erases it during the repair. Other causes are ageing electronics, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes.

Over time the reliability of electronic components declines, and cold solder joints can interrupt connections.

Moisture and corrosion at plug connectors increase the transition resistance. Voltage spikes, for example from a weak battery or when jump-starting, place additional strain on the electronics.

How can you tell that the 98820-4FA0B is defective?

A defect shows itself through the airbag warning light in the instrument cluster staying on permanently or only intermittently, through an error message in the instrument cluster, through a lack of connection to the diagnostic tool, or through a fault memory that cannot be cleared. In that case the airbags and seatbelt pretensioners may fail to deploy in an emergency.

Do not ignore the warning light, even if the car still drives normally. It is the most direct signal the car gives itself.

Only the readout shows whether the control unit is affected or a cable is the cause.

Which vehicles is the 98820-4FA0B fitted in?

This information is based on our own allocation. The control unit 98820-4FA0B is fitted in these vehicles: Nissan NV200 M20 (2009-2021).

These models are recorded in our allocation:

• Nissan NV200 M20 (2009-2021)

First check whether the part number on the label of the unit matches this page. Then you know you have removed the right unit. Also have the fault memory read out, 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 28556 3LS1E, 285563LS0E, 98820 3LS2D, 98820-1PD0B, 98820-3LM0A, 98820-3LM0B.

How does the repair of the 98820-4FA0B work?

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

Remove the unit only with the battery disconnected. Pack it carefully afterwards.

At Airbag24 the control unit is checked on the test bench, defective components are repaired, stored crash data is erased and a function test is carried out. The unit then goes back to you. Processing at Airbag24 usually takes 3–4 working days.

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 98820-4FA0B get to Airbag24?

The unit goes to Airbag24 as a parcel, or you book a UPS collection for an extra charge. After the repair you receive it back by UPS.

Include the printed repair order with the parcel, and pack the unit so that it is shock-resistant.