Airbag control unit with part number 98820-JF40A

What does the airbag control unit 98820-JF40A do?

The airbag control unit 98820-JF40A is the central control unit of the restraint system for Nissan. It processes the signals from the crash sensors and determines within milliseconds in an accident which airbags and seatbelt pretensioners are triggered.

The unit also monitors the entire system. If it finds a fault, it signals this via the airbag warning light in the instrument cluster.

After an accident it stores crash data and locks itself.

Why does the control unit 98820-JF40A fail?

The most common cause on the 98820-JF40A is stored crash data from an accident, even if no airbag was triggered. A normal diagnostic tool cannot remove this data. Other causes are also possible.

Crash data remains in the memory until it is specifically removed.

The other causes concern the electronics themselves: components age, solder joints can go cold, and moisture or corrosion clog plug connections.

In addition, voltage spikes can stress the circuit, for example with a weak battery or when a jump start is given.

How can you tell that the 98820-JF40A is defective?

A defect in the 98820-JF40A shows up as an airbag warning light in the instrument cluster that lights up permanently or intermittently, as an error message in the instrument cluster, and as a diagnostic tool that cannot establish a connection to the control unit.

A fault memory that cannot be cleared also counts among the signs. As long as the light is on, airbags and seatbelt pretensioners may not trigger in an emergency.

A look at the fault log will quickly bring clarity.

Which vehicles is the 98820-JF40A fitted in?

The control unit 98820-JF40A is fitted in these vehicles: Nissan GT-R R35 (2007-2025). The information relates to the control unit with this part number.

You can find the vehicle in this overview:

• Nissan GT-R R35 (2007-2025)

Comparing the part number on the label of the removed unit with this page only shows whether the unit is the correct one. That is why you should have the fault memory read out beforehand, because only the 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 98820-6AV0A, 98820JF43B, 98820JF70A.

How does the repair of the 98820-JF40A work?

First have the fault memory read out and attach the log. Then disconnect the battery and only then remove the control unit 98820-JF40A. Processing at Airbag24 usually takes 3–4 working days.

Then create a repair order online and send the well-packed unit. Airbag24 examines it on the test bench, repairs defective components, deletes stored crash data and carries out a function test. Your own unit is then returned 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-JF40A get to Airbag24?

The 98820-JF40A reaches Airbag24 as a package that you send yourself or that is collected by UPS for an extra charge. After the repair it is returned to you by UPS.

The printed repair order goes into the package, and the unit must be packed shock-resistant.