Airbag control unit with part number 98820-5SH0B

What does the airbag control unit 98820-5SH0B do?

The control unit 98820-5SH0B controls the restraint system (SRS) in Nissan. It records the signals from the impact sensors, decides within milliseconds in an accident whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously. It shows faults via the airbag warning light.

In continuous operation, the electronics check sensors, wiring and firing circuits. This keeps the system ready for an emergency.

After an accident, the unit stores crash data and locks itself.

Why does the control unit 98820-5SH0B fail?

The most common causes are crash data stored after an accident, even without an airbag firing. A normal diagnostic tool cannot delete them. In addition, ageing components, cold solder joints, moisture and corrosion, and voltage spikes come into consideration as causes.

They remain in the memory even if the vehicle continues to drive without any noticeable problems after the incident.

The other causes concern the electronics themselves or their power supply. Components age, solder joints can turn cold, and moisture attacks plug connectors. Voltage spikes arise, for example, from a weak battery or a jump-start.

Airbag24 deletes the crash data during the repair.

How can you tell that the 98820-5SH0B is defective?

The airbag warning light lights up in the instrument cluster permanently or intermittently when there is a fault on the 98820-5SH0B. In addition there are a fault message in the instrument cluster, no connection to the diagnostic tool and a fault memory that cannot be cleared. In an emergency, the airbags and seatbelt pretensioners may then fail to deploy.

The warning light is the actual warning signal. It shows that the system has detected a fault.

In everyday driving such a fault cannot always be noticed, which is why the indicator matters.

Which vehicles is the 98820-5SH0B fitted in?

The control unit 98820-5SH0B is fitted in this vehicle from Nissan: Nissan Leaf ZE1 (from 2017).

The assignment we have stored for this part number is listed here.

• Nissan Leaf ZE1 (from 2017)

Compare the number on the label of your removed unit with this page to confirm that you have the right part. Whether the control unit itself is faulty or a plug or a cable is the cause only becomes clear when the fault memory is read out. Please have it read out before removal.

For the same vehicles, we also repair control units with the part numbers 98820-4NS0A, 98820-4NS9A, 98820-5SA0E.

How does the repair of the 98820-5SH0B 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 98820-5SH0B. Checking, repairing and the function test at Airbag24 usually take 3–4 working days.

Online, you create the repair order, then pack the unit well. Airbag24 checks the unit on the test bench, replaces defective components, removes stored crash data and carries out a function test.

Your own 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 98820-5SH0B get to Airbag24?

Either you send the control unit 98820-5SH0B in as a parcel, or you book a UPS collection for an extra charge. The return after the repair is made by UPS.

Enclose the printed repair order and pack the unit shock-proof.