Airbag control unit with part number 98820-9MF1A

What does the airbag control unit 98820-9MF1A do?

The SRS control unit 98820-9MF1A belongs to the restraint system of Nissan and controls its triggering. It reads the signals from the crash sensors, selects the right airbags and seatbelt pretensioners within milliseconds in an accident, and monitors the entire system. After an accident it stores crash data and locks itself.

If the unit detects a fault, it reports it via the airbag warning light in the instrument cluster. In this way you as the driver learn that something is wrong in the system.

Why does the control unit 98820-9MF1A fail?

Most often the cause is stored crash data, even if no airbag was triggered in the accident. Added to this are aged components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes.

A normal diagnostic tool cannot erase crash data. Airbag24 removes this data during the repair.

The other causes relate to aging and environmental influences: electronics wear out, moisture attacks contacts, and poorly soldered spots can come loose. Voltage spikes, for example with a weak battery or after a jump-start, also belong here.

How can you tell that the 98820-9MF1A is defective?

If the airbag warning light in the instrument cluster lights up permanently or intermittently, and a fault message appears in addition, there is a fault. The same applies if the diagnostic tool cannot make a connection or the fault memory cannot be cleared. In both cases airbags and seatbelt pretensioners may fail to deploy in an emergency.

The warning light responds directly after the ignition is switched on and goes out if there is no fault. If it stays on or flickers intermittently, it should be checked.

If the diagnostic tool does not find the control unit, that is also a finding that must be investigated further.

Which vehicles is the 98820-9MF1A fitted in?

The 98820-9MF1A is fitted in these Nissan vehicles: Nissan Note E12 (2012-2016) and E12 Facelift (2016-2020). Before you remove the unit, compare your vehicle with this list.

The affected vehicles are listed here:

• Nissan Note E12 (2012-2016)
• Nissan Note E12 Facelift (2016-2020)

A comparison of the part number on the label with this page only ensures that you have the correct unit. Have the fault memory read out beforehand; the result shows 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 98820-5WK0A, 988203VS0B.

How does the repair of the 98820-9MF1A work?

Begin by having the fault memory read out and enclose the log with the parcel. Then disconnect the battery; only after that is the control unit removed. Next, create the repair order online and send the unit off carefully packed. Testing, repairing and checking at Airbag24 usually take 3–4 working days.

Airbag24 checks the unit on the test bench, replaces defective components, erases stored crash data and carries out a function test. The processing time is usually 3–4 working days.

After that your repaired unit comes 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 98820-9MF1A get to Airbag24?

You send the unit off as a parcel, or have it collected by UPS for an extra charge. The return after the repair is also made by UPS.

A printed repair order belongs in the parcel; the packaging must protect the unit against shocks.