Airbag control unit with part number 98820-4BD0A

What does the airbag control unit 98820-4BD0A do?

The airbag control unit 98820-4BD0A controls the restraint system (SRS) for Nissan. It evaluates the crash sensors, decides within milliseconds in a crash which airbags and seatbelt pretensioners fire, and monitors the system permanently. Detected faults are shown via the airbag warning light; after a crash it stores crash data and locks itself.

Monitoring runs without interruption, even while you are on the road. The unit continuously checks sensors and wiring.

Why does the control unit 98820-4BD0A fail?

The most common cause is crash data stored after an accident, even when no airbag has deployed; a standard diagnostic tool cannot erase it. Other causes on the control unit 98820-4BD0A include aged electronic components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes, for example from a weak battery or jump-starting.

Crash data stays in the memory until it is deliberately erased.

The other causes develop slowly. Electronics age, solder joints can go cold, and moisture promotes corrosion on plugs. Voltage spikes add further strain to the circuitry.

How can you tell that the 98820-4BD0A is defective?

A defect shows when the airbag warning light in the instrument cluster stays on permanently or intermittently, a fault message appears in the instrument cluster, the diagnostic tool gets no connection to the control unit 98820-4BD0A, or the fault memory cannot be cleared. Airbags and seatbelt pretensioners may then fail to deploy in an emergency.

The light is the system's own message and not a minor signal. Have the fault memory read out promptly.

If the display goes out after a restart, the fault is not resolved. The entry may still be stored in the memory.

Which vehicles is the 98820-4BD0A fitted in?

The airbag control unit 98820-4BD0A is fitted in these vehicles: Nissan Rogue T32 (2013-2020).

The following vehicles are on record for this control unit:

• Nissan Rogue T32 (2013-2020)

Comparing the part number on the label of the removed unit with this page only confirms that it is the correct unit. Whether it is defective or a plug or cable is the cause is determined solely by the fault memory, which you have read out beforehand.

For the same vehicles, we also repair control units with the part numbers 98820-1VK0A, 98820-1VL0A, 98820-4BS0A, 98820-6RR0C, 98820-6RR0D, 98820-6RR0E.

How does the repair of the 98820-4BD0A work?

Before removal, have the fault memory read out and attach the log; then disconnect the battery. Only then remove the control unit 98820-4BD0A, create a repair order online and send it off well packed. Airbag24 usually needs 3–4 working days for testing, repair and function testing.

The sequence is mandated for safety reasons.

At Airbag24 the unit is examined on the test bench, defective components are replaced, crash data is erased and a function test is carried out. The unit then 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 98820-4BD0A get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge, and after the repair Airbag24 brings it back to you by UPS. Enclose the printed repair order in the parcel and pack the control unit 98820-4BD0A shock-resistant.

A solid carton with filling material prevents the unit from knocking about during transport.