Airbag control unit with part number 98820-9KS0A

What does the airbag control unit 98820-9KS0A do?

The airbag control unit 98820-9KS0A works together with the restraint system (SRS) of Nissan. It evaluates the signals of the crash sensors and decides in an accident which airbags and seatbelt pretensioners trigger. A detected fault is indicated via the airbag warning light.

In driving operation it monitors the system without interruption. As long as there is no fault, you notice nothing of it.

After an accident the unit stores crash data and locks itself. The following sections explain what this means for diagnosis and repair.

Why does the control unit 98820-9KS0A fail?

The most common cause of a failure of the 98820-9KS0A is crash data stored after an accident, even if no airbag has deployed. A standard diagnostic tool cannot erase them. Ageing components, moisture, corrosion at plug connections and voltage spikes are also possible.

The crash data remain in the unit's memory until the repair erases them. Until then they cannot be removed with an ordinary diagnostic tool.

Among the other causes are ageing electronic components, which can lose performance after long use. Cold solder joints also play a role, as do moisture and corrosion at plug connections.

Voltage spikes also come into question, for example with a weak battery or when jump-starting. Which cause applies in the individual case only the readout of the fault memory shows.

How can you tell that the 98820-9KS0A is defective?

A defect in the 98820-9KS0A can be recognised by the airbag warning light in the instrument cluster, a fault message there, a missing connection to the diagnostic tool and a fault memory that cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

The signs at a glance:

• The airbag warning light stays on permanently or lights up intermittently.
• The instrument cluster displays a fault message.
• The diagnostic tool gets no connection to the control unit.
• The fault memory cannot be cleared.

As soon as one of these signs appears, have the fault memory read out so that the cause can be narrowed down.

Which vehicles is the 98820-9KS0A fitted in?

The control unit 98820-9KS0A is fitted in these vehicles: Nissan Almera N17 (2011-2020). We maintain this assignment for the vehicles named.

The vehicles known to us for this part number:

• Nissan Almera N17 (2011-2020)

Compare the part number on the label of the removed unit with this page; this only confirms that it is the correct 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 28556-9KN1B, 98820-9KA0A.

How does the repair of the 98820-9KS0A work?

First have the fault memory read out and attach the log, then disconnect the battery and remove the 98820-9KS0A only after that. Then create a repair order online and send in the well-packed unit. Checking, repairing and testing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench and replaces defective components. Stored crash data is erased, and then Airbag24 carries out a function test. After that your own unit goes back to you.

This sequence serves safety during removal. 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 98820-9KS0A get to Airbag24?

You send the control unit 98820-9KS0A as a parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 returns your own unit to you by UPS.

Pack the unit shockproof and include the printed repair order.