Airbag control unit with part number 98820-9PB4A

What does the airbag control unit 98820-9PB4A do?

The airbag control unit 98820-9PB4A coordinates the restraint system (SRS) in Nissan vehicles. It processes the data from the crash sensors and decides in an emergency, within milliseconds, which airbags and seatbelt pretensioners are triggered. It also monitors the entire system and reports faults via the airbag warning light.

After an accident the unit creates crash data and locks itself. The control of the airbags and seatbelt pretensioners runs through it, and the fault memory is kept there as well.

Why does the control unit 98820-9PB4A fail?

The control unit 98820-9PB4A most often fails because of crash data stored after an accident, even if no airbag has deployed. A normal diagnostic tool cannot erase this data. Other possible causes are aged components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Crash data only shows up when the unit is read out, because no airbag has to have deployed for it. That is why fault finding starts with the stored entries.

Aged components, moisture and corrosion at plug connections develop gradually. Cold solder joints are hard to spot from the outside.

Voltage spikes, for example when starting with a weak battery or jump-starting, hit the electronics immediately.

How can you tell that the 98820-9PB4A is defective?

A defect in the 98820-9PB4A shows up as the airbag warning light, which lights up permanently or intermittently, and as fault messages in the instrument cluster.

• Airbag warning light on permanently or intermittently
• Fault message in the instrument cluster
• The diagnostic tool gets no connection to the control unit
• The fault memory cannot be erased

In an emergency, airbags and seatbelt pretensioners may then fail to deploy, so the warning must be taken seriously.

If the warning appears only intermittently, that is no all-clear.

Which vehicles is the 98820-9PB4A fitted in?

Our records list the control unit 98820-9PB4A for the Nissan brand. It is fitted in these vehicles: Nissan Pathfinder R52 Facelift (2016-2021) and R52 (2013-2016).

The list shows the vehicles for which we have 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 to make sure you have the right unit. Have the fault memory read out beforehand, because only this result shows whether the control unit is actually the cause or a plug or cable is.

For the same vehicles, we also repair control units with the part numbers 285013305, 98820-9PC5A, 98820-9WD1A.

How does the repair of the 98820-9PB4A work?

Have the fault memory read out, then disconnect the battery; only then remove the control unit 98820-9PB4A. Next, create the repair order online. Processing at Airbag24 usually takes 3–4 working days.

Pack the unit well and send it in, with the fault memory log enclosed. At Airbag24 the control unit is tested on the test bench, defective components are repaired, crash data is erased and a function test is carried out. Your own unit then goes back to you.

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 98820-9PB4A get to Airbag24?

You send the control unit 98820-9PB4A to Airbag24 as a parcel, or you book a UPS collection for an extra charge. After the repair the unit comes back to you by UPS.

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