Airbag control unit with part number 98820-9MB0B

What does the airbag control unit 98820-9MB0B do?

In the airbag control unit 98820-9MB0B the signals from the crash sensors come together. In an accident it decides which airbags and seatbelt pretensioners of Nissan are triggered, and it monitors the system continuously. If it reports a fault, the airbag warning light comes on. After an accident the unit stores crash data and locks itself.

Monitoring runs in the background as soon as the vehicle is switched on.

Why does the control unit 98820-9MB0B fail?

Most often the cause is crash data from an earlier accident, even if no airbag has deployed; a standard diagnostic tool cannot remove it. Other causes are aged electronic components, cold solder joints, moisture at plug connections and voltage spikes.

Even an incident in which no airbag responded can leave such data behind. Fault finding should therefore include this possibility too.

Ageing, cold solder joints and corrosion develop over a longer period. Voltage spikes arise, for example, with a weak battery, and they can damage the electronics.

How can you tell that the 98820-9MB0B is defective?

The airbag warning light in the instrument cluster indicates the fault by lighting up constantly or intermittently. Typical signs are:

• Airbag warning light that stays on permanently or intermittently
• Fault message in the instrument cluster
• Diagnostic tool without connection to the control unit
• Fault memory that cannot be cleared

In an emergency, airbags and seatbelt pretensioners may not deploy while the fault persists.

Which vehicles is the 98820-9MB0B fitted in?

The assignment depends on the part number, not on a type designation. The 98820-9MB0B is fitted in these vehicles: Nissan Note E12 (2012-2016) and E12 Facelift (2016-2020).

The associated vehicles are listed here:

• Nissan Note E12 (2012-2016)
• Nissan Note E12 Facelift (2016-2020)

Compare the part number on the label of the removed unit with this page. That tells you it is the right unit. Have the fault memory read out: only the log shows whether the control unit is defective or whether a connector or a cable is the cause.

For the same vehicles, we also repair control units with the part numbers 98820-5WK0A, 988203VS0B.

How does the repair of the 98820-9MB0B work?

Have the fault memory read out and attach the log, disconnect the battery and only then remove the control unit. Create a repair order online and send in the well-packed unit. At Airbag24, testing, repair and function test usually take 3–4 working days.

On the test bench Airbag24 examines the unit, replaces defective components, deletes stored crash data and then carries out a function test.

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 98820-9MB0B get to Airbag24?

You send the unit in as a parcel or book a UPS collection for an extra charge. After the repair it comes back to you from Airbag24 by UPS.

Pack the printed repair order into the parcel and wrap the control unit shockproof.