Airbag control unit with part number 98820-9HF5C

What does the airbag control unit 98820-9HF5C do?

The airbag control unit 98820-9HF5C controls the restraint system of Nissan. It evaluates the crash sensors, determines in an accident within milliseconds which airbags and seatbelt pretensioners are triggered, and monitors the entire system. It indicates faults via the airbag warning light.

After an accident, the unit stores crash data and is then locked. The lock is lifted only by the repair.

It is connected to sensors and triggers via wiring. In normal driving it hardly stands out.

Why does the control unit 98820-9HF5C fail?

The most common cause is crash data stored after an accident, even without a triggered airbag. A standard diagnostic tool cannot erase it. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery or a jump start.

Crash data remains in the unit if the vehicle continues to be driven. Only the repair at Airbag24 removes it.

Electronics age over time, solder joints can go cold, and moisture reaches plug connections. There, corrosion attacks the contacts.

Voltage spikes stress the electronics briefly and can promote damage.

How can you tell that the 98820-9HF5C is defective?

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

The light is the vehicle's direct sign of a fault. If it stays on permanently or keeps coming back, the system must be checked.

The error message in the instrument cluster confirms the finding. A diagnostic tool without contact additionally shows that communication is disturbed.

Which vehicles is the 98820-9HF5C fitted in?

The airbag control unit 98820-9HF5C is fitted in these vehicles: Nissan Altima L34 Facelift (from 2022).

The list shows which vehicles are recorded in our data for this part number.

• Nissan Altima L34 Facelift (from 2022)

Compare the part number on the label of the removed unit with this page. That only ensures that you have the right unit. Also have the fault memory read out, because only this log shows whether the control unit is defective or a connector or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 98820-3TA9C, 98820-9HS9A, 98820-9HS9B.

How does the repair of the 98820-9HF5C work?

You first read out the fault memory and keep the log. Then you disconnect the battery and only afterwards remove the control unit. Then you create the repair order online and send the unit in well packed.

Airbag24 tests the unit on the test bench, repairs defective components, erases stored crash data and carries out a function test. Afterwards, your own unit comes back to you.

Processing at Airbag24 usually takes 3–4 working days. This refers exclusively to the work in-house.

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 98820-9HF5C get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

Put the printed repair order in the parcel. Pack the unit shockproof.