Airbag control unit with part number 98820-4DM0A

What does the airbag control unit 98820-4DM0A do?

The airbag control unit 98820-4DM0A coordinates the restraint system (SRS) in Nissan vehicles. It evaluates the crash sensors and decides in an accident which airbags and seatbelt pretensioners are triggered.

Between events the unit checks the components of the system. It stores faults and shows them via the airbag warning light.

After an accident it records crash data and locks itself.

Why does the control unit 98820-4DM0A fail?

The most common cause is crash data stored after an accident, even if no airbag has fired. A normal diagnostic tool cannot erase it. Ageing electronics, cold solder joints and moisture at the plugs are also possible causes.

The crash data stays in the unit until it is removed as part of the repair. That no airbag has fired does not rule it out.

The other causes may be linked to age, corrosion and voltage fluctuations, for example from a weak battery. A diagnosis shows which of them applies.

How can you tell that the 98820-4DM0A is defective?

Watch out for these signs:

• Airbag warning light in the instrument cluster that stays on permanently or intermittently
• Fault message in the instrument cluster
• No connection between the diagnostic tool and the control unit
• Fault memory that cannot be cleared

If there is a defect, airbags and seatbelt pretensioners may not fire in an emergency. The warning light is a clear sign that a check is needed.

Which vehicles is the 98820-4DM0A fitted in?

The control unit 98820-4DM0A is fitted in these vehicles: Nissan X-Trail T32 (2014-2017) and T32 Facelift (2017-2022).

You will find the assignment to the models in this overview.

• Nissan X-Trail T32 (2014-2017)
• Nissan X-Trail T32 Facelift (2017-2022)

Comparing the part number on the label of the removed unit with this page only shows that it is the matching unit. Having the fault memory read out beforehand answers whether the control unit is defective or whether a plug or a cable is the cause.

For the same vehicles, we also repair control units with the part numbers 1520831000, 152083100B, 1520831U00, 1520831U01, 1520831U0A, 98820JH43A.

How does the repair of the 98820-4DM0A work?

First have the fault memory read out and enclose the log. Then disconnect the battery, remove the control unit and create the repair order online. Processing at Airbag24 takes 3–4 working days as a rule.

Then send the well-packed unit in. The sequence is prescribed for safety reasons.

Airbag24 checks the control unit on the test bench, replaces defective components, erases the 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 98820-4DM0A get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. Airbag24 returns it by UPS after the repair.

Enclose the printed repair order in the parcel and pack the unit shock-proof.