Airbag control unit with part number 98820-9HS0A

What does the airbag control unit 98820-9HS0A do?

The airbag control unit 98820-9HS0A is the central control unit of the restraint system (SRS) for Nissan. It evaluates the crash sensors and decides within milliseconds in a crash which airbags and seatbelt pretensioners are triggered. It monitors the system continuously and shows faults via the airbag warning light.

While driving, the control unit checks the signals from the connected components. A deviating value results in an entry in the fault memory.

After an accident the control unit stores crash data and then locks itself. This also applies when no airbag was triggered.

Why does the control unit 98820-9HS0A fail?

The most common cause is crash data stored after an accident, even when no airbag has triggered. A normal diagnostic tool cannot erase it. In addition, aged electronic components, cold solder joints, moisture and corrosion on plug connectors, and voltage spikes from a weak battery or jump-starting come into consideration.

The crash data remains in the unit without this being visible from the vehicle. A diagnostic tool gives no access with which the data could be removed.

The other causes develop gradually. Electronic components age, solder joints can give way with temperature changes, and moisture or corrosion weaken the contact at plug connectors.

How can you tell that the 98820-9HS0A is defective?

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

The airbag warning light in the instrument cluster is the sign you will notice first. It does not go out on its own just because the vehicle keeps driving.

The fault message in the instrument cluster describes the finding but does not name the cause. Only the fault memory shows whether the control unit is affected.

Which vehicles is the 98820-9HS0A fitted in?

The 98820-9HS0A is fitted in these vehicles: Nissan Altima L33 (2012-2018).

The list below shows the vehicles that Airbag24 has assigned to this part number.

• Nissan Altima L33 (2012-2018)

Compare the part number on the label of the removed unit with this page. This only shows that it is the correct unit; the comparison says nothing more. Have the fault memory read out beforehand, because only this result 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 98820-3TA0B, 98820-3TA9C, 98820-9HN0A, 98820-9HS9A.

How does the repair of the 98820-9HS0A work?

The fault memory is read out first, and the log is attached to the unit. Then disconnect the battery and only then remove the control unit. At Airbag24 processing usually takes 3–4 working days.

After that, create a repair order online and pack the unit carefully for shipping. Airbag24 checks it on the test bench, replaces defective components, erases the stored crash data and tests the function. Then you receive your own unit back.

The order of these steps is for your safety. The 3–4 working days refer exclusively to the work at Airbag24, not to reading out, removal or shipping.

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 98820-9HS0A get to Airbag24?

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

Put the printed repair order into the parcel and pack the unit shock-proof.