Airbag control unit with part number 98820-3NA1A

What does the airbag control unit 98820-3NA1A do?

The airbag control unit 98820-3NA1A coordinates the restraint system (SRS) for Nissan. It processes the signals from the crash sensors and decides in an accident which airbags and seatbelt pretensioners are triggered within milliseconds.

In addition, it monitors the entire system continuously and reports faults via the airbag warning light. The warning light in the instrument cluster is therefore the visible interface to the driver.

After an accident, the unit records crash data and locks itself. This lock is only lifted by the repair.

Why does the control unit 98820-3NA1A fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed; a normal diagnostic tool does not erase it. Other causes include ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Airbag24 erases the crash data during the repair. The diagnostic tool cannot take this step beforehand, so the entry remains in the memory until then.

The other causes tend to be gradual. Electronics age, solder joints lose contact over time, and moisture attacks plug connections. A weak battery or a jump start can also produce voltage spikes.

How can you tell that the 98820-3NA1A is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently. Added to this are a fault message in the instrument cluster, a missing connection to the diagnostic tool, and a fault memory that cannot be cleared.

The signs in detail:

• airbag warning light on permanently or intermittently
• fault message in the instrument cluster
• no connection to the diagnostic tool
• fault memory cannot be cleared

While the control unit reports a fault, airbags and seatbelt pretensioners may not be able to deploy in an emergency. Please follow up on a lit warning light.

Which vehicles is the 98820-3NA1A fitted in?

The 98820-3NA1A is fitted in these vehicles: Nissan Leaf ZE0 (2010-2017).

The following vehicles are listed for this part number:

• Nissan Leaf ZE0 (2010-2017)

Compare the part number on the label of the removed unit with this page. That only confirms that it is the right unit, nothing more.

Have the fault memory read out beforehand. 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 98820-3NF0A, 98820-5SA0E, K8820-3NA0A.

How does the repair of the 98820-3NA1A work?

First have the fault memory read out and attach the log. Then disconnect the battery and only afterwards remove the control unit. Processing at Airbag24 usually takes 3–4 working days.

Then create a repair order online and send the unit in well packed. Airbag24 checks the unit on the test bench, replaces defective components, erases the crash data and carries out a functional test.

The 3–4 working days refer only to checking, repairing and testing at Airbag24. Reading out, removal and shipping are not included. Your own unit is then returned to you.

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 98820-3NA1A get to Airbag24?

You send the device as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

Place the printed repair order in the parcel and pack the unit shock-proof.