Airbag control unit with part number 98820-4KK1A

What does the airbag control unit 98820-4KK1A do?

The airbag control unit 98820-4KK1A controls the restraint system (SRS) in Nissan. It evaluates the signals from the crash sensors, decides in an accident within fractions of a second on the triggering of airbags and seatbelt pretensioners, and monitors the system continuously.

If the unit detects a fault, it shows it via the airbag warning light in the instrument cluster. In this way the state of the system is readable for the driver at all times.

After an accident, it stores crash data and locks itself. The lock is lifted only by a repair.

Why does the control unit 98820-4KK1A fail?

The most common cause is crash data after an accident, even if no airbag has deployed. An ordinary diagnostic tool cannot erase this data. Further causes are aged electronic components, cold solder joints, moisture and corrosion at plugs, and voltage spikes.

Crash data arises when the unit records an accident event. No airbag needs to have fired for this, and the entries remain even when nothing can be seen on the vehicle any more.

The other causes are of a general nature. Electronics age, solder joints can become weak points, and moisture and corrosion affect the contacts.

Voltage spikes, for example from a weak battery or a jump start, can additionally stress the electronics.

How can you tell that the 98820-4KK1A is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently. In addition there is a fault message in the instrument cluster, a missing connection between the diagnostic tool and the control unit, and a fault memory that cannot be cleared.

The light is a warning signal to which you should respond promptly, because in an emergency the airbags and seatbelt pretensioners may fail to deploy.

A missing connection to the diagnostic tool is also a clear indication. A precise check is then needed to narrow down the cause.

Which vehicles is the 98820-4KK1A fitted in?

The control unit 98820-4KK1A is fitted in these vehicles: Nissan Navara D23 (2015-2020). With this information you can check before removal whether it belongs to your car.

The following list shows the vehicles for which this part number is recorded.

• Nissan Navara D23 (2015-2020)

Compare the part number on the label of the removed unit with this page, because that tells you that you have the right unit. Nothing more is established by this comparison. Additionally have the fault memory read out, because only this result shows whether the control unit is defective or a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 0 285 015 304, 98820 6KB0A, 98820 EB01D, 988204KJ1A.

How does the repair of the 98820-4KK1A work?

First have the fault memory read out, then disconnect the battery, and only then remove the control unit. Airbag24 checks, repairs and tests the unit and erases the crash data. Processing usually takes 3–4 working days.

On your side, reading out, disconnecting and removing follow one another in this order. Afterwards, create a repair order online and send the well-packed unit.

In the Airbag24 test bench, defective components are replaced. A function test follows, and then your own unit goes 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 98820-4KK1A get to Airbag24?

You send the control unit 98820-4KK1A as a parcel, or for an extra charge you book a UPS collection. The return shipment after the repair is made by UPS.

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