Airbag control unit with part number 98820-5SN0B

What does the airbag control unit 98820-5SN0B do?

The airbag control unit 98820-5SN0B controls the restraint system (SRS) for Nissan. It evaluates the crash sensors, determines in an accident within milliseconds which airbags and seatbelt pretensioners are triggered, and monitors the system continuously.

It indicates faults via the airbag warning light in the instrument cluster.

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

Why does the control unit 98820-5SN0B fail?

The most common cause with the 98820-5SN0B is crash data from an accident, which is stored even if no airbag has triggered. Ageing components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes are also possible causes.

Crash data cannot be erased with a standard diagnostic tool. Airbag24 removes it during the repair.

Other possible causes at a glance:

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

How can you tell that the 98820-5SN0B is defective?

With the 98820-5SN0B, you can recognise a fault by the airbag warning light, by error messages in the instrument cluster, by a missing connection to the diagnostic tool, and by a fault memory that cannot be cleared.

If the airbag warning light is on constantly or only intermittently, this is already a finding. If a message in the display accompanies this state, the notice becomes even clearer.

A diagnostic tool without contact to the control unit, or a fault memory that you cannot empty, also indicate a fault. Airbags and seatbelt pretensioners may then possibly not trigger in an emergency.

Which vehicles is the 98820-5SN0B fitted in?

The airbag control unit 98820-5SN0B is fitted in these vehicles: Nissan Leaf ZE1 (from 2017).

The following vehicles are on record for this part number:

• Nissan Leaf ZE1 (from 2017)

Comparing the part number on the label of the removed unit with this page only confirms that you are holding the matching unit.

Have the fault memory read out in advance, because only this result shows whether the control unit is faulty or whether a plug or a cable is the cause.

For the same vehicles, we also repair control units with the part numbers 98820-4NS0A, 98820-4NS9A, 98820-5SA0E.

How does the repair of the 98820-5SN0B work?

You begin by having the fault memory read out and adding the log. Then you disconnect the battery and only afterwards remove the 98820-5SN0B. Next, you create the repair order online and pack the unit well for dispatch. Processing at Airbag24 normally takes 3–4 working days.

At Airbag24, the unit is checked, defective components are replaced, the crash data is erased and a function test is run. Afterwards, your own unit comes back to you.

Processing at Airbag24 normally takes 3–4 working days; this period includes neither your removal nor the dispatch.

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 98820-5SN0B get to Airbag24?

A parcel is enough: send the 98820-5SN0B to Airbag24, or have it collected by UPS for an extra charge. UPS handles the return after the repair.

The printed repair order goes into the parcel, and the unit must be packed shock-resistant.