Airbag control unit with part number 98820-6UM0B

What does the airbag control unit 98820-6UM0B do?

The airbag control unit 98820-6UM0B controls the restraint system (SRS) for Nissan. It evaluates the crash sensors, determines in an emergency which airbags and seatbelt pretensioners are triggered, and monitors the entire system continuously.

Triggering is decided within a fraction of a second, which is why the unit always stays in operation. It indicates faults via the airbag warning light.

After an accident, it stores crash data and then locks itself.

Why does the control unit 98820-6UM0B fail?

The most common cause with the 98820-6UM0B is crash data stored after an accident, which remains even if no airbag has deployed. Crash data cannot be erased with a normal diagnostic tool. Other causes are aged electronics, cold solder joints, moisture and corrosion on plug connections, and voltage spikes.

The crash data remains in the memory of the control unit, and Airbag24 removes it during the repair.

Which other causes are actually present cannot be determined without reading out the unit:

• aged electronic components
• cold solder joints
• moisture and corrosion at plug connections
• voltage spikes, for example from a weak battery or jump-starting

How can you tell that the 98820-6UM0B is defective?

On the 98820-6UM0B, the airbag warning light in the instrument cluster lights up permanently or intermittently if there is a fault. A fault message in the instrument cluster, no connection between the diagnostic tool and the control unit, or a fault memory that cannot be cleared also indicate it.

In an emergency, airbags and seatbelt pretensioners may then be unable to deploy. That is why the warning light is not a minor matter but the signal you should react to.

The display in the instrument cluster is the visible part of the fault.

• Airbag warning light in the instrument cluster
• Error message in the instrument cluster
• Diagnostic tool does not reach the control unit
• Fault memory cannot be cleared

Which vehicles is the 98820-6UM0B fitted in?

The control unit 98820-6UM0B is fitted in these vehicles: Nissan Qashqai J12 (2021-2024).

The vehicles assigned to this part number are listed here.

• Nissan Qashqai J12 (2021-2024)

Comparing the part number on the label of the removed unit with this page only ensures that it is the correct unit. Whether the control unit itself is defective, or whether a connector or cable is the cause, is shown only by the fault memory log read out beforehand.

For the same vehicles, we also repair control units with the part numbers 988206UD0A, 988206UM0A, 988206UT0C.

How does the repair of the 98820-6UM0B work?

First read out the fault memory and enclose the log. Then disconnect the battery and only then remove the control unit 98820-6UM0B. Then create a repair order online and send in the unit well packed. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, repairs defective components, erases the crash data and performs a functional test.

Your own unit is returned afterwards. 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 98820-6UM0B get to Airbag24?

You send the 98820-6UM0B as a parcel or book a UPS collection for an extra charge. After the repair, it comes back by UPS.

Put the printed repair order in the parcel and pack the unit shock-resistant.