Airbag control unit with part number 98820 CB800

What does the airbag control unit 98820 CB800 do?

The airbag control unit 98820 CB800 is the restraint system (SRS) control unit for Nissan. It checks the signals from the crash sensors, decides in an accident within milliseconds whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously. After an accident it stores crash data and locks itself.

Faults are reported via the airbag warning light and are also stored in the fault memory.

In the background, the control unit continuously evaluates what the sensors report.

Why does the control unit 98820 CB800 fail?

Most often the cause is crash data stored after an accident, even if no airbag has triggered; a normal diagnostic tool cannot erase it. Added to this are aged electronic components, moisture and corrosion at plug connectors, cold solder joints, and voltage spikes caused by a weak battery or jump-starting.

The problem with crash data is that you cannot see it on the vehicle. Airbag24 removes it during the repair.

The other causes are general in nature and cannot be narrowed down without a test.

How can you tell that the 98820 CB800 is defective?

The airbag warning light in the instrument cluster lights up permanently or from time to time, a fault message appears, the diagnostic tool gets no connection to the control unit, or the fault memory cannot be cleared. Then airbags and seatbelt pretensioners may not trigger in an emergency.

The warning light is not a minor matter but the system's own message.

If you ignore the display, the system may not work as intended in an emergency.

Which vehicles is the 98820 CB800 fitted in?

The 98820 CB800 is fitted in these vehicles: Nissan Murano Z50 (2002-2008).

The list of vehicles stored for this part number follows directly below.

• Nissan Murano Z50 (2002-2008)

Compare the part number on the label of the removed unit with this page; this only confirms that you have the right unit. Have the fault memory read out beforehand, because only the result 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 98820-CA010, 98820CB80D, 98820CC000.

How does the repair of the 98820 CB800 work?

First you have the fault memory read out and enclose the log. Then you disconnect the battery and only then remove the control unit. Next you create a repair order online and pack the unit well.

At Airbag24 the unit is checked on the test bench, defective components are repaired, the crash data is deleted and a function test is run. Afterwards the unit goes back to you.

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 CB800 get to Airbag24?

You send the unit 98820 CB800 in as a parcel or book a UPS collection for an extra charge, and Airbag24 returns it by UPS after the repair.

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