Airbag control unit with part number 98820-3LM0B

What does the airbag control unit 98820-3LM0B do?

The airbag control unit 98820-3LM0B is the central control of the restraint system (SRS) in Nissan. It processes the crash sensor signals, decides in an accident within milliseconds about airbags and seatbelt pretensioners, and stores crash data after an accident. It then locks itself.

In operation, the unit monitors all components of the system. If it reports a fault, the airbag warning light in the instrument cluster lights up.

The lock ends exclusively with the repair.

Why does the control unit 98820-3LM0B fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed. This data cannot be erased with a normal diagnostic tool. Ageing electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes are also possible causes.

The fact that no airbag deployed does not mean that no crash data was created. The cause can therefore be in the fault memory without anything being visible on the vehicle.

The other causes affect the electronics. Components age, solder joints go cold, moisture and corrosion attack the connectors, and voltage spikes arise, for example with a weak battery or when jump-starting.

How can you tell that the 98820-3LM0B is defective?

A defect shows up as the airbag warning light in the instrument cluster lighting up permanently or intermittently. Other signs include a fault message in the instrument cluster and a diagnostic tool without connection.

• Airbag warning light lights up permanently or intermittently
• Fault message in the instrument cluster
• Diagnostic tool receives no connection to the control unit
• Fault memory cannot be cleared

In an emergency, airbags and seatbelt pretensioners may not trigger if the control unit is defective. Take the message seriously.

Which vehicles is the 98820-3LM0B fitted in?

The 98820-3LM0B is fitted in these vehicles: Nissan NV200 M20 (2009-2021).

You can find a list of the assignment here:

• Nissan NV200 M20 (2009-2021)

Compare the part number on the label of the removed unit with this page. That ensures that it is the right unit. Have the fault memory read out beforehand, because only this result 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 98820-3LM0B work?

For the repair of the 98820-3LM0B, first have the fault memory read out and enclose the log. Then disconnect the battery, and only after that remove the control unit. Next, create a repair order online and send in the well-packed unit.

Airbag24 checks it on the test bench, replaces defective components, erases stored crash data and carries out a function test. Afterwards, your own unit is returned to you.

Processing at Airbag24 usually takes 3–4 working days.

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 98820-3LM0B get to Airbag24?

You send the control unit 98820-3LM0B as a parcel to Airbag24, or book a UPS collection for an extra charge. After the repair, it comes back to you by UPS.

The printed repair order goes into the parcel, and you pack the unit shockproof.