Airbag control unit with part number 98820-3LM0A

What does the airbag control unit 98820-3LM0A do?

The airbag control unit 98820-3LM0A forms the central control unit of the SRS for Nissan. It evaluates signals from the crash sensors, decides within milliseconds in an accident on airbags and seatbelt pretensioners, and keeps the system under observation.

It indicates detected faults via the airbag warning light. After an accident it stores crash data and locks itself.

Why does the control unit 98820-3LM0A fail?

The most common cause is stored crash data, even if no airbag has deployed in the accident. A standard diagnostic tool cannot erase it. Further causes are aged components, moisture at plugs and voltage spikes.

The data is erased only during the repair. This is why resetting with onboard means does not lead to the goal.

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

How can you tell that the 98820-3LM0A is defective?

Typical signs are an airbag warning light that lights up permanently or intermittently, and messages in the instrument cluster. If the diagnostic tool has no connection to the control unit, or the fault memory cannot be cleared, that is a further indication. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

• airbag warning light in the instrument cluster, permanently or intermittently on
• error message in the instrument cluster
• no connection between the diagnostic tool and the control unit
• fault memory cannot be cleared

Only the read-out shows whether the defect lies in the control unit or in the wiring.

Which vehicles is the 98820-3LM0A fitted in?

The 98820-3LM0A is intended for vehicles of the make Nissan. It is fitted in these vehicles: Nissan NV200 M20 (2009-2021).

The list names the vehicles individually:

• Nissan NV200 M20 (2009-2021)

Compare the number on the label of the removed unit with this page. This comparison only tells you that it is the right unit. Have the fault memory read out beforehand, because the log 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 285563LS0E, 98820-1PD0B.

How does the repair of the 98820-3LM0A work?

First have the fault memory read out and enclose the log. Then disconnect the battery, remove the control unit and send it in after creating an online repair order. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 examines the unit on the test bench, replaces defective components, erases the stored crash data and then carries out a function test. The unit then goes back to you.

The order of steps concerns safety, which is why it cannot be reversed.

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 98820-3LM0A get to Airbag24?

Either you send the control unit 98820-3LM0A as a parcel, or you book a UPS collection for an extra charge. Airbag24 sends it back to you by UPS after the repair.

Pack the printed repair order into the parcel and pack the control unit shock-proof.