Airbag control unit with part number 98820-9CF0B

What does the airbag control unit 98820-9CF0B do?

The control unit 98820-9CF0B is responsible for the restraint system (SRS) in the Nissan. It evaluates the signals from the crash sensors and decides in an accident, within milliseconds, which airbags and seatbelt pretensioners are triggered. While driving it monitors the system and reports faults via the airbag warning light.

An accident causes crash data to be stored and the unit to lock itself.

For most of the time the control unit is inconspicuous. A fault appears in the instrument cluster only once the unit detects it itself.

Why does the control unit 98820-9CF0B fail?

Stored crash data is the most common cause, even if no airbag was triggered in an incident. An ordinary diagnostic tool cannot delete it. Aged electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes, for example from a weak battery or a jump start, are also possible.

The first point concerns the unit itself. As soon as it assesses an event as an accident, it creates crash data, regardless of whether an airbag has triggered.

The second point concerns the environment of the unit. Moisture and corrosion attack the plug connections, and voltage fluctuations can impair the electronics.

The third point is the age of the components. Solder joints and semiconductors change over time, so a fault can develop.

How can you tell that the 98820-9CF0B is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, and an error message appears. The diagnostic tool finds no connection to the control unit, and a fault memory cannot be cleared.

These signs indicate that something in the system is wrong, even if the car otherwise drives normally. The warning light is the most reliable signal, so do not ignore it. Until the system is checked, airbags and seatbelt pretensioners may possibly not trigger in an emergency.

Which vehicles is the 98820-9CF0B fitted in?

The 98820-9CF0B is fitted in these vehicles: Nissan Xterra N50 (2005-2008) and N50 Facelift (2008-2015).

The vehicles recorded for this control unit can be found in the list below.

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

Comparing the part number on the label of the removed unit with this page only tells you about the identity of the unit. Have the fault memory read out beforehand, so that the log shows whether the control unit is defective or whether a cable or plug 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 98820-9CF0B work?

Start by having the fault memory read out and enclosing the log. Then disconnect the battery and afterwards remove the control unit. Finally create the repair order online and pack the unit well for sending it in.

Airbag24 inspects the unit on the test bench and repairs defective components. The crash data is then deleted and a function test is carried out. 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 98820-9CF0B get to Airbag24?

The unit goes to Airbag24 as a parcel, or you book a UPS collection for an extra charge. After the repair, UPS brings the control unit back to you.

The printed repair order goes into the parcel, and the unit must be packed shock-proof.