Airbag control unit with part number 98820-3NL0A

What does the airbag control unit 98820-3NL0A do?

The airbag control unit 98820-3NL0A is the central control unit of the restraint system (SRS) for Nissan. It evaluates the signals from the crash sensors, decides on the triggering of airbags and seatbelt pretensioners in an impact, and monitors the system continuously. It shows faults via the airbag warning light.

The sensors report acceleration and deceleration values to the unit. The control unit evaluates these values immediately and decides whether the restraint devices are activated.

After an accident, the unit stores crash data and then locks itself. The lock applies to the control unit itself.

The warning light display is the central feedback you receive from the system.

Why does the control unit 98820-3NL0A fail?

The most common cause is crash data that remains stored in the unit after an accident, even if no airbag has triggered; a standard diagnostic tool cannot erase it. Other causes are aged electronic components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes.

Stored crash data can lead to an error message even though the electronics themselves may be intact. Airbag24 removes this data during the repair.

The other causes lie in the electronics and the connections. Components age, solder joints can be cold, and moisture attacks plug connections. Voltage spikes, for example from a weak battery or a jump start, load the circuit.

Without testing, the cause cannot be named with certainty.

How can you tell that the 98820-3NL0A is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, an error message appears in the instrument cluster, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared. With a defect, airbags and seatbelt pretensioners may not trigger in a crash.

The airbag warning light in the instrument cluster shows a fault, whether it lights up permanently or only now and then. It is therefore the central warning signal in everyday use.

An error message in the instrument cluster, a missing connection between the diagnostic tool and the control unit, and a fault memory that cannot be cleared are further signs of a problem in the system.

Which vehicles is the 98820-3NL0A fitted in?

The control unit 98820-3NL0A is fitted for Nissan in these vehicles: Nissan Leaf ZE0 (2010-2017).

The list of vehicles registered for this part number follows here:

• Nissan Leaf ZE0 (2010-2017)

Compare the part number on the label of the removed unit with this page. This only shows that you have the right unit. Have the fault memory read out beforehand, because only this log 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 98820-3NL0A work?

First have the fault memory read out and enclose the log. Then disconnect the battery and only then remove the control unit. Next create a repair order online and pack the unit carefully before sending it in.

The sequence is binding, because it protects you during work on the airbag system.

Airbag24 checks the submitted unit on the test bench, replaces defective components, erases the stored crash data and carries out a function test. Processing at Airbag24 usually takes 3–4 working days. Your own unit is then sent back 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 98820-3NL0A get to Airbag24?

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

Put the printed repair order into the parcel and pack the control unit shockproof.