Airbag control unit with part number 98820-9CL0A

What does the airbag control unit 98820-9CL0A do?

The 98820-9CL0A is the airbag control unit for the SRS restraint system of Nissan. It processes the signals of the crash sensors and decides in an accident within milliseconds on the triggering of airbags and seatbelt pretensioners.

During normal operation it monitors all components of the system and reports faults via the airbag warning light.

If an accident has occurred, it stores crash data and locks itself. The lock is lifted only by the repair.

Why does the control unit 98820-9CL0A fail?

The most common cause is crash data stored after an accident, even without an airbag having deployed. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery or a jump start.

Crash data cannot be removed with a normal diagnostic tool. It remains in memory until it is erased during the repair.

The other causes concern the electronics themselves and their connections. Moisture and corrosion attack the contacts, ageing weakens components, and voltage spikes strain the circuit. Only the check shows which of these is present.

How can you tell that the 98820-9CL0A is defective?

A defect in the 98820-9CL0A shows up on the airbag warning light in the instrument cluster, which lights up permanently or intermittently. Typical signs are also fault messages in the instrument cluster, no connection to the diagnostic tool, and a fault memory that cannot be cleared.

• Airbag warning light on permanently or intermittently
• Fault message in the instrument cluster
• No connection between diagnostic tool and control unit
• Fault memory cannot be cleared

As long as the fault exists, airbags and seatbelt pretensioners may not deploy in an emergency.

A prompt check is therefore important as soon as the warning light comes on.

Which vehicles is the 98820-9CL0A fitted in?

The models with the 98820-9CL0A are: Nissan Xterra N50 (2005-2008) and N50 Facelift (2008-2015).

The list below shows which vehicles belong to this part number.

• Nissan Xterra N50 (2005-2008)
• Nissan Xterra N50 Facelift (2008-2015)

Comparing the number on the removed unit with this page only shows that you have the correct unit. The cause is established by reading out the fault memory, and that should be done beforehand. Only the log shows whether the control unit itself is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 28556-EC00B, 98820-AV200, 98820-AV21A, 98820-ZP31A.

How does the repair of the 98820-9CL0A work?

First have the fault memory read out and enclose the log, then disconnect the battery and only then remove the control unit. Processing at Airbag24 usually takes 3–4 working days.

Then you create a repair order online and send the unit off well packed.

Airbag24 checks the unit on the test bench, replaces defective components, erases stored crash data and carries out a function test. The own unit then 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 98820-9CL0A get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

The printed repair order and a shockproof packaging of the unit belong in the parcel.