Airbag control unit with part number 98820-9SE0A

What does the airbag control unit 98820-9SE0A do?

The airbag control unit 98820-9SE0A controls the restraint system (SRS) in Nissan. It evaluates the signals of the crash sensors, decides in an accident within fractions of a second on airbags and seatbelt pretensioners, and monitors the system continuously. After an accident it stores crash data and locks itself.

The monitoring runs in the background and covers sensors, wiring and trigger circuits. The unit stores faults it finds in its memory and reports them via the airbag warning light.

Why does the control unit 98820-9SE0A fail?

The most common cause is stored crash data after an accident, even if no airbag has deployed; they cannot be erased with a normal diagnostic tool. Other causes are ageing electronics, cold solder joints, moisture and corrosion on plug connections, and voltage spikes.

Crash data remains stored after the accident and is only removed by Airbag24 during the repair.

The other causes concern the condition of the electronics. Components lose reliability over time, solder joints may have gone cold, and in plug connections moisture and corrosion lead to faults. Voltage spikes, for example with a weak battery or after jump-starting, additionally stress the circuit.

How can you tell that the 98820-9SE0A is defective?

A fault makes itself noticeable mainly through the airbag warning light, which lights up permanently or intermittently in the instrument cluster, and through an error message. In addition there is a diagnostic tool without connection to the control unit, and a fault memory that cannot be erased. In an emergency, airbags and seatbelt pretensioners may then fail to trigger.

Watch the warning light closely after switching on the ignition, because that is where a defect shows most clearly.

A defect therefore does not stay hidden, because the display in the instrument cluster reports it directly.

Which vehicles is the 98820-9SE0A fitted in?

The 98820-9SE0A is fitted by Nissan: Nissan NV200 M20 (2009-2021).

The vehicle details follow below.

• Nissan NV200 M20 (2009-2021)

Two comparisons are useful, and they serve different purposes. Comparing the part number on the label of the removed unit with this page makes sure it is the right unit. Having the fault memory read out in advance, on the other hand, shows whether the control unit is defective or whether a connector 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 98820-9SE0A work?

First have the fault memory read out and enclose the log with the unit; then disconnect the battery and remove the control unit. Afterwards you create a repair order online and send the unit off packaged. Processing at Airbag24 usually takes 3–4 working days.

At the test bench, Airbag24 examines the unit. Defective components are repaired or replaced, the crash data is erased and the functional test is carried out. Afterwards your own 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 98820-9SE0A get to Airbag24?

The unit is sent to Airbag24 as a parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 returns it by UPS.

Shock-proof packed, the control unit goes into the shipping carton together with the printed repair order.