Airbag control unit with part number 98820 9U20A

What does the airbag control unit 98820 9U20A do?

The airbag control unit 98820 9U20A controls the restraint system (SRS) for Nissan. It polls the crash sensors, calculates within milliseconds in a collision whether airbags and seatbelt pretensioners are triggered, and checks the system continuously. It displays faults via the airbag warning light.

The check routines run during the entire journey. The system therefore notices faults early, long before they could play a role in an emergency.

After an accident the unit stores crash data and locks itself.

Why does the control unit 98820 9U20A fail?

The most common cause: after an accident the unit has stored crash data, even if none of the airbags fired, and with a usual diagnostic tool this data cannot be removed. Aged components, cold solder joints, moisture on plug connections and voltage spikes may also be involved.

The list below summarises the other causes:

• ageing of electronic components
• cold solder joints in the unit
• moisture and corrosion on plugs
• voltage spikes, for example with a weak battery or after jump-starting

How can you tell that the 98820 9U20A is defective?

You can recognise a fault by the airbag warning light in the instrument cluster when it lights up constantly or intermittently. Fault messages in the instrument cluster, a failed connection with the diagnostic tool and a fault memory that cannot be cleared also belong here.

In an emergency, airbags and seatbelt pretensioners may not trigger if any of these signs appears.

• airbag warning light, constantly or intermittently
• fault message in the instrument cluster
• diagnostic tool without a connection
• fault memory that cannot be cleared

Which vehicles is the 98820 9U20A fitted in?

The airbag control unit 98820 9U20A is fitted in these vehicles: Nissan Note E11 (2005-2007), E11 1st Facelift (2007-2009) and E11 2nd Facelift (2009-2013). You check the assignment to your own car on the label of the removed unit.

The vehicles at a glance:

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

Comparing the part number with this page only confirms that it is the correct control unit. Also have the fault memory read out before you remove anything. Only this log shows whether the control unit is defective or a plug or cable is causing the fault.

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 9U20A work?

Above all, have the fault memory read out and attach the log. Then disconnect the battery, and only then remove the 98820 9U20A. Next create the repair order online and send the well-packed unit in.

At Airbag24 the unit is checked on the test bench, defective components are replaced, the crash data is erased and a functional test is run. Processing at Airbag24 usually takes 3–4 working days.

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 9U20A get to Airbag24?

The 98820 9U20A control unit goes to Airbag24 as a parcel, or you book a UPS collection for an extra charge. The return after the repair is likewise made by UPS.

Enclose the printed repair order with the unit and pack the control unit shock-proof.