Airbag control unit with part number 98820-3ND1A

What does the airbag control unit 98820-3ND1A do?

Working for Nissan, the airbag control unit 98820-3ND1A controls the restraint system (SRS). It processes the crash sensor signals, decides within milliseconds in an accident which airbags and seatbelt pretensioners are triggered, and monitors the system permanently. Faults are reported via the airbag warning light.

The unit works unseen until a fault occurs. After an accident it stores crash data, and then remains locked.

Why does the control unit 98820-3ND1A fail?

The most common cause is stored crash data, even if no airbag was triggered in the accident; an ordinary diagnostic tool cannot erase it. Further causes are aging electronics, cold solder joints, moisture on plugs and voltage spikes.

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

Crash data remains stored until someone processes it specifically. The other points take effect over a longer period before they trigger a fault.

How can you tell that the 98820-3ND1A is defective?

A defect is recognised by the airbag warning light in the instrument cluster, which lights up permanently or intermittently. In addition, an error message appears, the diagnostic tool gets no access to the control unit, and the fault memory cannot be cleared.

Have such a warning signal checked promptly. In an emergency, airbags and seatbelt pretensioners may possibly not deploy.

Which vehicles is the 98820-3ND1A fitted in?

At Nissan, this control unit appears only in individual vehicles. The control unit 98820-3ND1A is fitted in these vehicles: Nissan Leaf ZE0 (2010-2017).

This list shows the matching vehicles:

• Nissan Leaf ZE0 (2010-2017)

A comparison of the part number on the label of the removed unit with this page gives you certainty that it is the right unit. Have the fault memory read out beforehand, because this determines whether the control unit is defective or whether a connector and cable are the cause.

For the same vehicles, we also repair control units with the part numbers 98820-3NF0A, 98820-5SA0E, K8820-3NA0A.

How does the repair of the 98820-3ND1A work?

First read out the fault memory and attach the log. Then disconnect the battery, remove the control unit and create a repair order online before you send it in, well packed. At Airbag24, processing usually takes 3–4 working days.

At the test bench the unit is examined, and defective components are then repaired. The crash data disappears from memory in the process, and a final function test confirms the result before the unit is returned.

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 98820-3ND1A get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back via UPS.

The printed repair order goes into the parcel, and the unit is packed shock-proof.