Airbag control unit with part number 98820-4DV0A

What does the airbag control unit 98820-4DV0A do?

In the vehicle, the airbag control unit 98820-4DV0A forms the centre of the SRS restraint system of Nissan, that is, the control centre for airbags and seatbelt pretensioners. It evaluates the sensor signals and decides on triggering within milliseconds. In addition, after an accident it stores crash data and locks itself.

The unit checks the system for function continuously. If it detects a fault, it displays it via the airbag warning light in the instrument cluster.

The airbags and seatbelt pretensioners are connected to separate firing circuits, which the control unit monitors jointly.

Why does the control unit 98820-4DV0A fail?

Most often the cause lies in stored crash data that remains in the unit after an accident, even if no airbag has deployed. A standard diagnostic tool cannot erase this data. Other factors include aged components, dry solder joints, moisture and voltage spikes.

The fault persists as long as the crash data is stored. That is why an earlier accident still has an effect even if it was a long time ago.

The other causes relate to everyday operation of the electronics. Aged components lose reliability over time, dry solder joints can develop, and moisture or corrosion attack plug connections. Voltage spikes, for example from a weak battery or from starting with external help, put additional strain on the circuit.

How can you tell that the 98820-4DV0A is defective?

A defect is signalled by the airbag warning light, which lights up permanently or only intermittently. A fault message in the instrument cluster also indicates it, and the diagnostic tool gets no connection to the control unit. In an emergency, the airbags and seatbelt pretensioners may then not deploy.

These signs are typical:

• airbag warning light, permanently or intermittently on
• fault message in the instrument cluster
• no connection of the diagnostic tool to the control unit
• fault memory that cannot be emptied

If you notice any of these, have the system checked before continuing to use the vehicle.

Which vehicles is the 98820-4DV0A fitted in?

Check the details before removal. Control unit 98820-4DV0A is fitted for Nissan in these vehicles: Nissan Rogue T32 (2013-2020).

The models assigned to this part number can be found here:

• Nissan Rogue T32 (2013-2020)

Comparing the part number on the label of the removed unit with this page only ensures that you have the correct unit. Before you send the unit in, have the fault memory read out. Only this log shows whether the control unit is defective or a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 98820-1VK0A, 98820-1VL0A, 98820-4BS0A, 98820-6RR0C, 98820-6RR0D, 98820-6RR0E.

How does the repair of the 98820-4DV0A work?

Processing at Airbag24 usually takes 3–4 working days. Beforehand, you read out the fault memory and attach the log. Then you disconnect the battery, remove the unit and send it in well packed with a repair order created online.

In a fixed sequence: read out the fault memory, disconnect the battery, and only then remove the unit.

At Airbag24 the unit is checked on the test bench, defective components are repaired, stored crash data is erased and a function test is carried out. You then get your own unit back.

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 98820-4DV0A get to Airbag24?

You send the unit as a parcel or book a UPS collection. After the repair it goes back to you via UPS.

Enclose the printed repair order with the parcel and wrap the control unit shock-proof.