Airbag control unit with part number 98820-9UG1A

What does the airbag control unit 98820-9UG1A do?

The airbag control unit 98820-9UG1A is the central control unit of the restraint system (SRS) for Nissan. It evaluates the signals from the crash sensors, decides in an accident within milliseconds which airbags and seatbelt pretensioners are triggered, and monitors the system continuously. It shows faults via the airbag warning light.

In everyday driving you notice nothing of the control unit, because it carries out its checks in the background. The monitoring covers the sensors, the actuators and the power supply, so that the system is fully ready for use in an emergency.

After an accident the unit stores crash data and locks itself. This lock is only lifted by a repair.

Why does the control unit 98820-9UG1A fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed. This data cannot be deleted with a normal diagnostic tool. Other causes are aged electronics, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes, for example from a weak battery or jump-starting.

The crash data keeps the fault state in place, even if the electronics themselves show no defect. This is exactly why a fault does not disappear on its own after an incident, although nothing visible has remained on the vehicle.

The other causes develop slowly and are hard to notice. Dirty or damp plug connectors can cause contact problems over time.

• Aged electronics
• Cold solder joints
• Moisture and corrosion at plug connectors
• Voltage spikes, for example from a weak battery or jump-starting

How can you tell that the 98820-9UG1A 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.

With these signs, airbags and seatbelt pretensioners may not deploy in an emergency. Do not take the light lightly, even if the vehicle still drives without any problems.

The warning light shows the fault from the start. You do not need to visit a workshop to receive the information.

Which vehicles is the 98820-9UG1A fitted in?

The control unit 98820-9UG1A is fitted in these vehicles: Nissan Murano Z52 (2015-2024).

The vehicles assigned to the unit are listed here:

• Nissan Murano Z52 (2015-2024)

Compare the part number on the label of the removed unit with this page to confirm that you have the right unit. Also have the fault memory read out before you remove anything. Only the log shows whether the control unit itself is defective or whether a plug or a cable is the cause.

For the same vehicles, we also repair control units with the part numbers 629198200, 988205AA0A.

How does the repair of the 98820-9UG1A work?

First read out the fault memory and enclose the log. Then disconnect the battery and only then remove the control unit. Next create a repair order online and send the unit in well packed. Airbag24 processes it usually within 3–4 working days.

This order is mandatory for safety reasons, because the system must be de-energised during removal.

At Airbag24 the unit is checked on the test bench, defective components are repaired, stored crash data is deleted and a function test is carried out. Afterwards your own unit is sent back to you. The 3–4 working days refer solely to this check and repair.

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 98820-9UG1A 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 by UPS.

Pack the unit shockproof and enclose the printed repair order.