Airbag control unit with part number 98820-4HB0A

What does the airbag control unit 98820-4HB0A do?

The airbag control unit 98820-4HB0A is responsible for the SRS restraint system in the Infiniti. In an accident, it evaluates the crash sensors and determines which airbags and seatbelt pretensioners are triggered.

Even in everyday driving it works in the background and checks the system. It shows faults via the airbag warning light in the instrument cluster.

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

Why does the control unit 98820-4HB0A fail?

On the control unit 98820-4HB0A, stored crash data from an accident is the most common cause, even without a triggered airbag. Added to this are aged electronic components, cold solder joints, moisture and corrosion at plugs, and voltage spikes from a weak battery or a jump start.

Stored crash data cannot be removed with an ordinary diagnostic tool. Airbag24 deletes it as part of the repair.

Electronics age, and solder joints can go cold over time. Moisture and corrosion attack the plug contacts. Such damage may at first show no obvious symptoms.

How can you tell that the 98820-4HB0A is defective?

The airbag warning light in the instrument cluster lights up on the 98820-4HB0A either permanently or only from time to time. A fault message may also appear in the instrument cluster, and a diagnostic tool does not find the control unit.

The fault memory cannot be cleared in this case, which also points to a fault. The warning light is the central signal, and in every case it deserves attention.

In an emergency, airbags and seatbelt pretensioners may fail to deploy as a result. A check is therefore advisable as soon as such a sign appears.

Which vehicles is the 98820-4HB0A fitted in?

The 98820-4HB0A is fitted in these vehicles: Infiniti Q50 V37 (2013-2024).

The individual vehicles follow directly below.

• Infiniti Q50 V37 (2013-2024)

First: compare the part number on the label of the removed unit with this page. This tells you that you have the correct unit. Second: have the fault memory read out beforehand. 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 988206HE0A, K8820-4HL0A.

How does the repair of the 98820-4HB0A work?

Processing at Airbag24 usually takes 3–4 working days for testing, repairing and checking. Beforehand, have the fault memory read out and attach the log, then disconnect the battery and remove the control unit 98820-4HB0A.

Then create a repair order online and send in the well-packed unit. At Airbag24 it is checked on the test bench, defective components are replaced, the crash data is deleted and a function test is carried out.

Afterwards, you receive your own, repaired 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 98820-4HB0A get to Airbag24?

You send the control unit 98820-4HB0A as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

The printed repair order goes into the parcel, and the unit is packed shock-proof.