Airbag control unit with part number 98820-9KN0A

What does the airbag control unit 98820-9KN0A do?

The airbag control unit 98820-9KN0A coordinates the restraint system (SRS) of Nissan. It detects an impact via its sensors, decides within milliseconds whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously.

The unit reports faults in the system via the airbag warning light in the instrument cluster. Monitoring runs constantly, even when the vehicle is standing still.

In an accident the unit stores crash data and locks itself. Any diagnosis carried out on the unit afterwards will recognise this state.

Why does the control unit 98820-9KN0A fail?

The most common cause is crash data left in the unit by an accident, even if no airbag has deployed. Further causes are aged electronics, cold solder joints, moisture and corrosion, and voltage spikes.

Crash data cannot be erased with a normal diagnostic tool. At Airbag24 it is erased during the repair. The other causes at a glance:

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

How can you tell that the 98820-9KN0A is defective?

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

The light is in your field of view, so it is the signal you will notice immediately.

Whether the control unit itself is affected or a plug and a cable are the cause can be determined only by reading out the fault memory.

Which vehicles is the 98820-9KN0A fitted in?

Check from the list whether your model is included. The airbag control unit 98820-9KN0A is fitted in these vehicles: Nissan Almera N17 (2011-2020).

The list comes from our database for this number.

• Nissan Almera N17 (2011-2020)

Before removal, have the fault memory read out first, because its log shows whether the control unit is defective or whether a plug or a cable is the cause. In addition, compare the part number on the label with this page; that only confirms that the unit is the right one.

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

How does the repair of the 98820-9KN0A work?

First have the fault memory read out and attach the log. Then disconnect the battery and only afterwards remove the control unit. In the next step create a repair order online and send the unit in well packed. Airbag24 processes it usually within 3–4 working days, during which it is checked, repaired and tested.

On the test bench the unit is examined, defective components are replaced, the crash data is erased and a function test is run. The stated time refers solely to these steps. After that your own unit is sent 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 98820-9KN0A get to Airbag24?

The unit goes to Airbag24 as a parcel, or you book a UPS collection for an extra charge. The return after the repair follows by UPS.

The printed repair order goes into the parcel with the unit, which is packed shockproof.