Airbag control unit with part number 98820-4BE0A

What does the airbag control unit 98820-4BE0A do?

In Nissan vehicles the airbag control unit 98820-4BE0A takes over control of the restraint system (SRS). In a crash it evaluates the crash sensors, determines within milliseconds which airbags and seatbelt pretensioners to trigger, and checks the system continuously.

If a fault occurs, it appears via the airbag warning light in the instrument cluster. After an accident the unit stores crash data and locks itself.

Why does the control unit 98820-4BE0A fail?

The most common cause is crash data stored from an accident, even if no airbag has deployed. These cannot be erased with a conventional diagnostic tool, but Airbag24 removes them during the repair. Additional causes are ageing electronics, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes.

Ageing electronic components lose reliability over the years. Cold solder joints, in turn, can interrupt contacts.

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

How can you tell that the 98820-4BE0A is defective?

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

Do not overlook the warning light, even if the car still drives. It alerts you directly as soon as the system detects the problem.

Only the diagnosis shows which cause lies behind it. It decides whether the control unit itself or a cable is affected.

Which vehicles is the 98820-4BE0A fitted in?

Our allocation to Nissan lists this control unit, specifically in these vehicles: Nissan X-Trail T32 (2014-2017) and T32 Facelift (2017-2022).

The allocation in detail:

• Nissan X-Trail T32 (2014-2017)
• Nissan X-Trail T32 Facelift (2017-2022)

Compare the part number on the label of the removed unit with this page. That only shows whether it is the right unit. 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 28556-4CG0A, 28556-4CH0A, 28556-4CJ0A, 28556-4CM0A, 28556-4CS0A, 98820-4CG0A.

How does the repair of the 98820-4BE0A work?

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

The unit may only be removed with the battery disconnected. Pack the unit 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 follows. 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 98820-4BE0A get to Airbag24?

The unit goes to Airbag24 as a parcel, or you book a UPS collection for an extra charge. Once repaired, it is sent back to you by UPS.

The printed repair order belongs in the parcel, and the control unit must be packed shock-resistant.