Airbag control unit with part number 98820-9HF5D

What does the airbag control unit 98820-9HF5D do?

The airbag control unit 98820-9HF5D controls the SRS restraint system at Nissan. It evaluates the crash sensors, decides in an accident within milliseconds on airbags and seatbelt pretensioners, and reports faults via the airbag warning light.

Monitoring runs without interruption while driving and covers the sensors, airbags and seatbelt pretensioners.

After an accident the unit stores crash data and locks itself. Only the repair lifts this lock.

Why does the control unit 98820-9HF5D fail?

The crash data is the starting point: after an accident it remains in the unit even without a triggered airbag, and a normal diagnostic tool cannot erase it. Other causes are aged electronics, cold solder joints, moisture and corrosion, as well as voltage spikes.

Crash data stored after an accident cannot be removed with a conventional diagnostic tool. Airbag24 erases it during the repair.

The other causes concern the electronics and their surroundings. These include aged components, cold solder joints, and moisture and corrosion at the plug connections. Voltage spikes, for example from a weak battery or jump-starting, can cause further problems.

How can you tell that the 98820-9HF5D is defective?

A defect on the 98820-9HF5D becomes visible through the airbag warning light in the instrument cluster, which lights permanently or intermittently. Fault messages, a missing connection to the diagnostic tool and a fault memory that cannot be cleared are further indications. In an emergency, airbags and seatbelt pretensioners may possibly not deploy.

The warning light is the clearest warning sign visible in the vehicle. It signals a detected fault and calls for an inspection.

A failed connection to the control unit is a further indication. An examination of the system is then advisable.

Which vehicles is the 98820-9HF5D fitted in?

The airbag control unit 98820-9HF5D is fitted in these vehicles: Nissan Altima L34 Facelift (from 2022).

Here are the models of Nissan for which this part number is recorded.

• Nissan Altima L34 Facelift (from 2022)

Comparing the part number on the label with this page helps to avoid mix-ups. Then have the fault memory read out, because the log shows whether the control unit is defective or whether a cable together with its plug is causing the fault.

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 98820-9HF5D work?

First comes reading out the fault memory, and you enclose the log. Before removal you disconnect the battery; afterwards you remove the control unit 98820-9HF5D. Then create a repair order online, pack the unit and send it off. Processing at Airbag24 usually takes 3–4 working days.

At Airbag24 the unit is checked, defective components are replaced, the crash data is erased, and a functional test concludes the process.

You get your own unit 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 98820-9HF5D get to Airbag24?

You can send the control unit 98820-9HF5D as a parcel or have it collected by UPS for an extra charge. Airbag24 returns it to you by UPS after the repair.

Place the printed repair order in the shipment. Pack the unit shock-proof so that it arrives undamaged.