Airbag control unit with part number 98820 9U40A

What does the airbag control unit 98820 9U40A do?

The airbag control unit 98820 9U40A controls the restraint system (SRS) of Nissan. It evaluates the crash sensors and decides in an accident, within milliseconds, which airbags and seatbelt pretensioners are triggered.

While the vehicle is being driven, the unit checks continuously whether all components of the system are working. If it finds a fault, it reports it via the airbag warning light in the instrument cluster. After an accident, it records crash data and then locks itself.

The control unit is thus the link between the sensors and the triggers.

Why does the control unit 98820 9U40A fail?

The most common cause with the 98820 9U40A is crash data stored after an accident, even if no airbag was triggered. Aged components, cold solder joints, moisture and corrosion, and voltage spikes come on top of this.

A standard diagnostic tool cannot erase this crash data. Airbag24 removes it during repair.

• aged electronic components
• cold solder joints
• moisture and corrosion at plug connectors
• voltage spikes, for example from a weak battery or a jump-start

How can you tell that the 98820 9U40A is defective?

A defect on the 98820 9U40A shows up through the airbag warning light in the instrument cluster, which stays on permanently or intermittently, through a fault message in the instrument cluster, through a missing connection to the diagnostic tool and through a fault memory that cannot be cleared.

With these signs, airbags and seatbelt pretensioners may not deploy in an emergency. The warning light indicates the defect as soon as the system detects it.

• Airbag warning light stays on permanently
• Airbag warning light comes on intermittently
• Fault message in the instrument cluster
• Diagnostic tool does not find the control unit
• Fault memory cannot be cleared

Which vehicles is the 98820 9U40A fitted in?

The control unit 98820 9U40A is fitted in these vehicles: Nissan Note E11 (2005-2007), E11 1st Facelift (2007-2009) and E11 2nd Facelift (2009-2013).

The following models are assigned:

• Nissan Note E11 (2005-2007)
• Nissan Note E11 1st Facelift (2007-2009)
• Nissan Note E11 2nd Facelift (2009-2013)

Compare the part number on the label of the removed unit with this page. That only ensures it is the right unit. Also have the fault memory read out beforehand, because only that 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 285001909, 98820 BH20A, 98820-3VC0A, 98820-9U10A, 988209U30A.

How does the repair of the 98820 9U40A 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 only then remove the control unit. Next, create a repair order online and send the unit in well packed.

Airbag24 checks the unit on the test bench, replaces defective components, deletes stored crash data and carries out a function test. 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 9U40A get to Airbag24?

You send the control unit 98820 9U40A as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back via UPS.

Put the printed repair order into the parcel and pack the unit shockproof.