Airbag control unit with part number 98820-9PC4A

What does the airbag control unit 98820-9PC4A do?

The airbag control unit 98820-9PC4A is the central control unit of the restraint system (SRS) for Nissan. It evaluates the signals from the crash sensors, decides on airbags and seatbelt pretensioners within milliseconds in an accident, and monitors the system continuously. After an accident, it stores crash data and locks itself.

In the background, the electronics monitor the sensors, wiring and trigger circuits of the system. Every deviation is recorded in the fault memory.

The unit only works reliably when the power supply and plug connections are flawless. For this reason, the system watches for voltage fluctuations and reports irregularities to the warning light.

Why does the control unit 98820-9PC4A fail?

The most common cause is stored crash data after an accident, even if no airbag was triggered; a normal diagnostic tool cannot erase it. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

The crash data remains in the unit until Airbag24 erases it during the repair. An accident without a triggered airbag can still leave it behind, so it is worth looking at the fault memory.

Electronic components age, and solder joints can go cold over time. Moisture and corrosion disturb the contacts at the plug connections, which can lead to intermittent faults.

Voltage spikes occur with a weak battery or through a jump start and stress the circuits.

How can you tell that the 98820-9PC4A is defective?

A defect shows itself through an airbag warning light in the instrument cluster, through an error message in the instrument cluster, through a lack of connection to the diagnostic tool, or through a fault memory that cannot be erased. In an emergency, airbags and seatbelt pretensioners may then possibly not deploy.

• Warning light lights up permanently or intermittently
• Error message in the instrument cluster
• Diagnostic tool finds no connection to the control unit
• Fault memory cannot be erased

The warning light is the most important sign, because it reports every fault that is detected. Have the system checked as soon as one of these signs appears.

Which vehicles is the 98820-9PC4A fitted in?

The control unit 98820-9PC4A is fitted in these vehicles: Nissan Pathfinder R52 Facelift (2016-2021) and R52 (2013-2016).

The following overview shows the vehicles recorded for this part number.

• Nissan Pathfinder R52 Facelift (2016-2021)
• Nissan Pathfinder R52 (2013-2016)

Compare the part number on the label of the removed unit with this page, so that you can be sure you have the correct unit. Have the fault memory read out beforehand, because this result alone 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 285013305, 98820-9PC5A, 98820-9WD1A.

How does the repair of the 98820-9PC4A work?

First have the fault memory read out and enclose the log, then disconnect the battery and only then remove the control unit. Then create a repair order online and send in the well-packed unit.

Airbag24 tests the unit on the test bench, replaces defective components, erases the stored crash data and carries out a function test. After that, your own unit goes back to you. Processing at Airbag24 usually takes 3–4 working days, and this time covers testing, repairing and checking only.

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 98820-9PC4A get to Airbag24?

You send the unit as a parcel, or you 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 shockproof.

A sturdy carton with padding material protects the control unit in transit. The repair order belongs in the consignment in any case.