Airbag control unit with part number 98820-4JB0A

What does the airbag control unit 98820-4JB0A do?

The airbag control unit 98820-4JB0A is the central control unit of the SRS for Nissan. It evaluates the signals from the crash sensors and, in an accident, decides within a few milliseconds which airbags and seatbelt pretensioners are triggered.

The system monitors the unit continuously. If it detects a fault, the airbag warning light lights up.

After an accident it stores crash data and then locks itself.

Why does the control unit 98820-4JB0A fail?

On the 98820-4JB0A, the most common cause is the storage of crash data after an accident, even if no airbag has triggered. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes.

Crash data cannot be removed with an ordinary diagnostic tool. Airbag24 erases it during the repair.

Aged electronic components and cold solder joints are typical weak points that only become visible during a test. Moisture and corrosion attack the plug connectors.

Voltage spikes, for example from a weak battery or a jump-start, can likewise lead to a failure.

How can you tell that the 98820-4JB0A is defective?

A permanently or intermittently lit airbag warning light is a clear sign of a defect on the 98820-4JB0A. In addition there are a fault message in the instrument cluster, a diagnostic tool without a connection and a fault memory that cannot be cleared.

Pay particular attention to these signs:

• Warning light in the instrument cluster, permanently or from time to time
• Fault message in the instrument cluster
• Diagnostic tool does not find the control unit
• Fault memory cannot be cleared

In an emergency, airbags and seatbelt pretensioners may not trigger. Take the display seriously, even if the car otherwise drives normally.

Which vehicles is the 98820-4JB0A fitted in?

The details apply to Nissan. The control unit 98820-4JB0A is fitted in these vehicles: Nissan Navara D23 (2015-2020).

The list shows these vehicles:

• Nissan Navara D23 (2015-2020)

A comparison of the part number on the label of the removed unit with this page only ensures that it is the right unit. The cause is established only by the fault memory, which you have read out beforehand, because it shows whether the control unit is defective or whether a plug or cable is affected.

For the same vehicles, we also repair control units with the part numbers 0 285 015 304, 98820 6KB0A, 98820 EB01D, 988204KJ1A.

How does the repair of the 98820-4JB0A work?

For the 98820-4JB0A, first have the fault memory read out and enclose the log. Then disconnect the battery before the control unit is removed. Create the repair order online and send in the well-packed unit.

Airbag24 checks the unit on the test bench, replaces defective components, erases stored crash data and carries out a function test. Processing at Airbag24 usually takes 3–4 working days. The 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 98820-4JB0A get to Airbag24?

You send the 98820-4JB0A to Airbag24 as a parcel, or you book a UPS collection for an extra charge. After the repair Airbag24 returns the unit by UPS.

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