Airbag control unit with part number 98820-3AA1A

What does the airbag control unit 98820-3AA1A do?

The airbag control unit 98820-3AA1A belongs to the restraint system (SRS) of Nissan and is its evaluation unit. In an accident it checks the signals from the crash sensors and triggers the appropriate airbags and seatbelt pretensioners within milliseconds.

While driving, the unit checks all components of the system. It stores any faults it finds and shows them via the airbag warning light in the instrument cluster.

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

Why does the control unit 98820-3AA1A fail?

For the 98820-3AA1A, the most common cause is crash data stored after an accident, even without a triggered airbag. Other causes are aged components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

A normal diagnostic tool cannot erase this data. The repair at Airbag24 removes it from the memory.

The other causes lie in the electronics itself, at the plug connections or in the power supply. A weak battery or a jump start can produce voltage spikes.

How can you tell that the 98820-3AA1A is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently if something is wrong with the 98820-3AA1A. In addition a fault message appears, the diagnostic tool receives no connection to the control unit, and the fault memory cannot be cleared.

The warning light is an unmistakable sign, because the system itself reports the fault.

In an emergency, airbags and seatbelt pretensioners may not deploy as a result. If you notice these signs, have the fault checked promptly.

Which vehicles is the 98820-3AA1A fitted in?

The control unit is fitted only in certain models of Nissan. The 98820-3AA1A is fitted in these vehicles: Nissan Almera N17 (2011-2020).

The assignment to models is as follows:

• Nissan Almera N17 (2011-2020)

If the part number on the label of the removed unit matches this page, it is the correct unit. Only the fault memory shows whether the control unit itself is defective, since a connector or cable can also be the cause. Therefore have it read out beforehand.

For the same vehicles, we also repair control units with the part numbers 28556-9KN1B, 98820-9KA0A.

How does the repair of the 98820-3AA1A work?

First have the fault memory of the 98820-3AA1A read out and enclose the log. Then disconnect the battery and remove the unit.

Only then create the repair order online and send the well-packed unit.

Airbag24 checks the unit on the test bench, replaces defective components and carries out a function test. Stored crash data is also erased by Airbag24. Processing usually takes 3–4 working days, after which your own unit is 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 98820-3AA1A get to Airbag24?

The 98820-3AA1A reaches Airbag24 either as a parcel or via a UPS collection that you book for an extra charge. The return is made by UPS.

The printed repair order goes into the parcel. Make sure the unit is packed shock-resistant.