Airbag control unit with part number 98820-4CM0A

What does the airbag control unit 98820-4CM0A do?

The airbag control unit 98820-4CM0A is the central control unit of the SRS for Nissan. It evaluates the signals from the crash sensors and determines within milliseconds, in an accident, which airbags and seatbelt pretensioners are triggered.

The airbag warning light in the instrument cluster indicates faults that the unit detects. The system is monitored continuously throughout.

After an accident, it records crash data and locks itself.

Why does the control unit 98820-4CM0A fail?

On the 98820-4CM0A, the most common cause is crash data stored after an accident, even if no airbag has deployed. Other causes are aged electronics, dry solder joints, moisture and corrosion, and voltage spikes.

Crash data cannot be erased with a normal diagnostic tool. Airbag24 clears it during the repair.

The further causes are summarised in the following list:

• aged electronic components
• dry solder joints
• moisture and corrosion at plug connections
• voltage spikes, for example from a weak battery or a jump start

How can you tell that the 98820-4CM0A is defective?

The airbag warning light on the 98820-4CM0A stays on permanently or intermittently. This is accompanied by a fault message in the instrument cluster, no connection between the diagnostic tool and the control unit, and a fault memory that cannot be cleared.

In that case, airbags and seatbelt pretensioners may not deploy in an emergency.

The light is a warning that you should have checked promptly.

Which vehicles is the 98820-4CM0A fitted in?

The airbag control unit 98820-4CM0A is fitted in these vehicles: Nissan X-Trail T32 (2014-2017) and T32 Facelift (2017-2022).

The following overview lists the vehicles recorded for this part number.

• 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 confirms that you have the right unit. Have the fault memory read out beforehand, as 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 1520831000, 152083100B, 1520831U00, 1520831U01, 1520831U0A, 98820JH43A.

How does the repair of the 98820-4CM0A work?

First have the fault memory read out and enclose the log. Then disconnect the battery and only then remove the control unit. Next, create a repair order online and send in the unit, well packed.

Processing at Airbag24 usually takes 3–4 working days.

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 98820-4CM0A get to Airbag24?

You send the unit as a parcel, or book a UPS collection for an extra charge. Airbag24 returns the control unit 98820-4CM0A by UPS after the repair.

Put the printed repair order into the parcel and pack the unit shockproof.