Airbag control unit with part number 98820-3LN1B

What does the airbag control unit 98820-3LN1B do?

In the restraint system (SRS) of Nissan vehicles, the airbag control unit 98820-3LN1B evaluates the crash sensors. In a crash it decides within milliseconds which airbags and seatbelt pretensioners are triggered. During operation it monitors the system and reports faults.

The display is provided by the airbag warning light in the instrument cluster. After a crash the unit stores crash data and locks itself.

Why does the control unit 98820-3LN1B fail?

The most common cause is crash data from an accident, and this applies even if no airbag has deployed. This data cannot be erased with a standard diagnostic tool. Other causes are essentially wear of the electronics, moisture in connectors and voltage spikes.

As part of a repair, not by reading it out, these entries disappear from the memory.

• Wear of electronic components
• solder joints that have gone cold
• moisture and rust at plug connections
• voltage spikes, for example with a weak battery or jump-starting

How can you tell that the 98820-3LN1B is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently and thus indicates a fault. In addition there is a fault message in the instrument cluster, no connection to the diagnostic tool and a fault memory that cannot be cleared. Airbags and seatbelt pretensioners may then fail to deploy in an emergency.

Only the log answers whether the cause lies in the unit or in the wiring.

If in doubt, the readout helps.

Which vehicles is the 98820-3LN1B fitted in?

The number 98820-3LN1B is assigned to the make Nissan. The control unit is fitted in these vehicles: Nissan NV200 M20 (2009-2021).

An overview of the vehicles:

• Nissan NV200 M20 (2009-2021)

The label on the removed unit shows the number; compare it with this page. This shows whether the unit fits. Having the fault memory read out is independent of this and shows whether the electronics themselves or 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 98820-3LN1B work?

The log of the fault memory is the start: you have it read out and attach the printout. Only then do you disconnect the battery and remove the control unit. Online you create the repair order, then you send in the well-packed unit.

At Airbag24 the unit is checked, defective components are replaced, the crash data is erased and a functional test is run. Processing time is usually 3–4 working days.

The order of steps on the vehicle is binding, as it concerns safety.

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 98820-3LN1B get to Airbag24?

A parcel is sufficient; alternatively a UPS collection can be booked for an extra charge. After the repair the return follows by UPS.

You put the printed repair order into the parcel, and you pack the unit shock-proof.