Airbag control unit with part number 98820-3NA0A

What does the airbag control unit 98820-3NA0A do?

The airbag control unit 98820-3NA0A is the restraint system (SRS) control unit in Nissan. It processes the signals from the crash sensors and determines within milliseconds in a collision which airbags and seatbelt pretensioners to trigger.

The unit monitors the system constantly. It stores faults and shows them via the airbag warning light in the instrument cluster.

After an accident it stores crash data and locks itself.

Why does the control unit 98820-3NA0A fail?

The most common cause on the 98820-3NA0A is crash data stored after an accident, even if no airbag was triggered. Further causes are aged electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes.

A normal diagnostic tool cannot erase the crash data. It remains in the memory until Airbag24 removes it during the repair.

The remaining causes relate to age and environment. Electronics age, solder joints can go cold, and moisture or corrosion affect the plug connectors. Voltage spikes arise, for example, from a weak battery or a jump start.

How can you tell that the 98820-3NA0A is defective?

The airbag warning light in the instrument cluster stays on at the 98820-3NA0A permanently or intermittently, and an error message appears in the instrument cluster. In addition, the diagnostic tool gets no connection to the control unit, or the fault memory cannot be cleared. In a real emergency, airbags and seatbelt pretensioners may then fail to trigger.

The control unit itself issues the warning light as soon as it detects a fault. A defect is therefore indicated, not hidden.

Only the readout of the fault memory shows which component is affected.

Which vehicles is the 98820-3NA0A fitted in?

The 98820-3NA0A is fitted in these vehicles: Nissan Leaf ZE0 (2010-2017).

The following vehicles are assigned to this part number at Airbag24:

• Nissan Leaf ZE0 (2010-2017)

Comparing the part number on the label of the removed unit with this page only ensures that it is the right unit. Have the fault memory read out beforehand. Only that result shows whether the control unit is defective or a plug or cable is 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 98820-3NA0A work?

At the 98820-3NA0A, first read out the fault memory and enclose the log. Then disconnect the battery, remove the control unit and create the repair order online. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 examines the unit on the test bench. Defective components are replaced, the crash data is erased and a function test is carried out before the unit goes back.

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 98820-3NA0A get to Airbag24?

You send the control unit 98820-3NA0A as a parcel, or you book a UPS collection for an extra charge. After the repair, UPS returns the unit to you.

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