Airbag control unit with part number 98820-9AM0A

What does the airbag control unit 98820-9AM0A do?

The airbag control unit 98820-9AM0A coordinates the restraint system (SRS) in Nissan. From the signals of the crash sensors, it decides in a crash within milliseconds which airbags and seatbelt pretensioners are triggered, and it checks the system continuously. Faults it finds are displayed via the airbag warning light.

If the unit stores crash data after an accident, it locks itself afterwards.

The control unit is therefore the point where all safety components work together.

Why does the control unit 98820-9AM0A fail?

The most common cause is a memory full of crash data from an accident, even if no airbag triggered; these cannot be erased with a normal diagnostic tool. Other causes include ageing electronics, cold solder joints, moisture and corrosion on plug connections, and voltage spikes, for example from a weak battery or a jump start.

Crash data is created as soon as the control unit processes an accident. Whether an airbag ultimately triggered changes nothing about this, which is why it is always included in the search for the cause.

Electronic components age over time. Solder joints can go cold, and moisture as well as corrosion weaken the plug connections.

Voltage spikes in the vehicle electrical system also stress the electronics. A weak battery or a jump start can play a role here in particular.

How can you tell that the 98820-9AM0A is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently, a fault message is displayed, the diagnostic tool does not find the control unit, or the fault memory cannot be cleared. Then the airbags and seatbelt pretensioners may possibly not trigger in an emergency.

The warning light is the sign you are most likely to notice in everyday driving. If it comes on, have the system checked promptly before you rely on its function.

A missing connection to the diagnostic tool or a fault memory that cannot be cleared are also findings that suggest a closer inspection.

Which vehicles is the 98820-9AM0A fitted in?

The control unit 98820-9AM0A is fitted in these vehicles: Nissan Sylphy B17 (from 2012).

Our details for this number give the following vehicles:

• Nissan Sylphy B17 (from 2012)

Comparing the part number on the label with this page ensures that you have the correct unit. Have the fault memory read out beforehand, because only that shows whether the control unit itself is the cause.

For the same vehicles, we also repair control units with the part numbers 28556-3RA0A, 28556-3RB0A, 28556-3RC0A, 28556-3RD0B, 28556-3RF0B, 28556-3RL0A.

How does the repair of the 98820-9AM0A work?

Before removal, have the fault memory read out, attach the log and disconnect the battery; only then remove the control unit. Afterwards create the repair order online and send the unit in well packed. Airbag24 checks it on the test bench, repairs defective components, erases stored crash data and carries out a function test; processing usually takes 3–4 working days.

The order is binding, because the restraint system is touched during removal.

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 98820-9AM0A get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. The return after the repair also goes by UPS.

The printed repair order goes into the parcel, and the unit is packed shockproof.