Airbag control unit with part number 98820-9SD0A

What does the airbag control unit 98820-9SD0A do?

The airbag control unit 98820-9SD0A is the central control unit of the SRS restraint system of Nissan. It processes the measurements from the crash sensors, decides in an accident whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously. After an accident it stores crash data and locks itself.

It carries out self-checks constantly and stores detected faults in the fault memory. If a finding occurs, the airbag warning light in the instrument cluster lights up.

A decision of this kind is made within milliseconds, so in an emergency the function depends on an intact unit.

Why does the control unit 98820-9SD0A fail?

On the 98820-9SD0A, stored crash data after an accident is the most common cause, even if no airbag has deployed. Added to this are aged electronics, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Crash data cannot be deleted with a common diagnostic tool, so it stays in the unit after the accident. The problem therefore does not arise only from a defect in the electronics; it can already be present after the accident.

Ageing shows in components that endure heat and vibration over years. Solder joints can develop hairline cracks, and moisture leads to corrosion on plugs. Voltage spikes, for example with a weak battery or when a jump start is connected, put additional strain on the unit.

How can you tell that the 98820-9SD0A is defective?

The airbag warning light in the instrument cluster indicates a defect in the 98820-9SD0A when it lights up permanently or intermittently. Further signs are fault messages, no connection established by the diagnostic tool, and a fault memory that cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then not deploy.

The warning light is the most important indicator, because it reports a fault in the restraint system directly. Do not ignore it; have the cause clarified promptly.

Fault messages in the display are also a reason to have the system checked.

Which vehicles is the 98820-9SD0A fitted in?

The list serves to match it with your car. The control unit 98820-9SD0A is fitted in these vehicles: Nissan NV200 M20 (2009-2021).

The vehicle in detail:

• Nissan NV200 M20 (2009-2021)

Compare the part number on the label of the removed unit with this page. That only establishes that it is the right unit. In addition, have the fault memory read out before removal, so that it becomes visible whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 28556 3LS1E, 285563LS0E, 98820 3LS2D, 98820-1PD0B, 98820-3LM0A, 98820-3LM0B.

How does the repair of the 98820-9SD0A work?

For the 98820-9SD0A the sequence is this: first you have the fault memory read out and enclose the log, then you disconnect the battery. Only then do you remove the control unit. Next you create a repair order online and send the well-packed unit in. At Airbag24, checking, repair and test usually take 3–4 working days.

Airbag24 checks the unit on the test bench, replaces defective components and deletes the stored crash data. A functional test follows, and then your own, repaired unit 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 98820-9SD0A get to Airbag24?

You send the 98820-9SD0A to Airbag24 as a parcel, or alternatively book a UPS collection for an extra charge. After the repair it comes back to you by UPS.

Put the printed repair order into the parcel. Pack the unit so that it is shock-resistant.