Airbag control unit with part number 98820-9KH4A

What does the airbag control unit 98820-9KH4A do?

In the restraint system (SRS) of Nissan, the airbag control unit 98820-9KH4A controls the triggering of the airbags and seatbelt pretensioners. It processes the signals from the crash sensors, makes the triggering decision in an accident, and monitors all components continuously.

If it detects a fault, it reports it via the airbag warning light.

After an accident, the control unit stores crash data and locks itself.

Why does the control unit 98820-9KH4A fail?

The most common cause is stored crash data from an accident, even without a triggered airbag, which cannot be erased with a standard diagnostic tool. Aged components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes are also possible causes.

The crash data is held in the memory of the control unit. A diagnostic tool intended for reading out and fault memory does not remove it.

Aged components and cold solder joints affect the circuit itself. Moisture and corrosion disrupt the contacts on the connectors.

Voltage spikes, for example from a weak battery or a jump start, place additional stress on the electronics.

How can you tell that the 98820-9KH4A is defective?

A defect shows itself through the airbag warning light, which lights up permanently or intermittently, through an error message in the instrument cluster, through a lost connection to the diagnostic tool, and through a fault memory that cannot be erased.

These signs stand out:

• Warning light lights up in the instrument cluster
• Error message is displayed
• Diagnostic tool does not connect to the control unit
• Fault memory remains

In an emergency, airbags and seatbelt pretensioners may then fail to deploy, which is why you should have a warning checked promptly.

Which vehicles is the 98820-9KH4A fitted in?

The airbag control unit 98820-9KH4A is fitted at Nissan in these vehicles: Nissan Almera N17 (2011-2020). The basis is our assignment for this number.

The assignment in detail:

• Nissan Almera N17 (2011-2020)

Comparing the number on the label with this page ensures that the device is the right one. Reading out the fault memory, on the other hand, shows whether the control unit itself is defective or whether a plug or a cable is causing the fault.

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

How does the repair of the 98820-9KH4A work?

Have the fault memory read out and attach the log to the device. Then disconnect the battery, and only after that remove the control unit. Create the repair order online and send in the device well packed.

At Airbag24, the team checks the device on the test bench, replaces defective components, erases stored crash data and runs a function test. Processing usually takes 3–4 working days.

Afterwards, your own device is returned. 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 98820-9KH4A get to Airbag24?

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

Pack the printed repair order into the box and protect the device against impacts.