Airbag control unit with part number 98820-4CS0A

What does the airbag control unit 98820-4CS0A do?

The airbag control unit 98820-4CS0A forms the central control of the restraint system (SRS) of Nissan. It processes the signals from the crash sensors and decides in an accident within milliseconds which airbags and seatbelt pretensioners are triggered.

The airbag warning light in the instrument cluster reports faults that the unit detects. At the same time, the control monitors the entire system without interruption.

After an accident, the control unit stores crash data and locks itself.

Why does the control unit 98820-4CS0A fail?

Crash data from an earlier accident is the most common cause, even if no airbag has been triggered. A standard diagnostic tool cannot delete it. In addition, aged electronic components, cold solder joints, moisture and corrosion on connectors, and voltage spikes can cause the failure.

At Airbag24, the crash data is deleted during the repair. This is part of the processing and not an additional service.

The other causes lie in the unit itself or its environment. Electronics age, solder joints on the circuit board can become cold, and moisture or corrosion attack connectors. Voltage spikes arise, for example, from a weak battery or when connecting to a jump-start.

How can you tell that the 98820-4CS0A is defective?

A defect on the 98820-4CS0A shows in the airbag warning light, which stays on permanently or intermittently, and in a fault message there. The diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared.

If the connection is disturbed, airbags and seatbelt pretensioners may possibly not trigger in an emergency. Therefore, do not ignore the warning.

Have the finding clarified promptly, even if the vehicle runs unremarkably in everyday use.

Which vehicles is the 98820-4CS0A fitted in?

The assignment depends on the part number 98820-4CS0A. The control unit 98820-4CS0A is fitted in these vehicles: Nissan X-Trail T32 (2014-2017) and T32 Facelift (2017-2022).

The overview lists the vehicles recorded for this part number.

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

Compare the part number on the label of the removed unit with this page, so you can be sure it is the correct unit. Also have the fault memory read out beforehand. Only this result shows whether the control unit itself is defective or whether a connector 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 98820-4CS0A work?

Processing at Airbag24 usually takes 3–4 working days. First, have the fault memory read out and enclose the log, then disconnect the battery and remove the control unit. Next, create the repair order online and send the unit in well packed.

Airbag24 checks the unit on the test bench, repairs defective components, deletes the crash data and runs a function test. Your own unit is then returned to you.

This time covers only the checking, repairing and testing at Airbag24.

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 98820-4CS0A get to Airbag24?

You send the control unit 98820-4CS0A as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

Place the printed repair order in the parcel and pack the unit shock-resistant.