Airbag control unit with part number 98820-4AV0B

What does the airbag control unit 98820-4AV0B do?

The airbag control unit 98820-4AV0B is the central control unit of the restraint system (SRS) for Nissan. It evaluates the signals from the crash sensors, determines in an accident which airbags and seatbelt pretensioners are triggered, and monitors the system continuously.

The unit detects faults in the system itself and shows them via the airbag warning light in the instrument cluster. The warning light is therefore the signal you should notice first.

After an accident, the control unit stores crash data and locks itself. Nothing more can be said on this point at this stage.

Why does the control unit 98820-4AV0B fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed. A normal diagnostic tool cannot erase it. Other causes are aged electronic components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes.

Crash data remains stored in the unit after the event, so fault-finding quickly reaches its limits. The fault memory does show the entry, but not necessarily the actual cause.

The other causes result from age, moisture and electrical load. Electronics fatigue, solder joints can become brittle, and wet conditions or salt attack the contacts. A weak battery or jump-starting can raise the voltage briefly so far that components are damaged.

How can you tell that the 98820-4AV0B is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently, and a fault message appears in the instrument cluster. In addition, the diagnostic tool cannot reach the control unit, or the fault memory cannot be cleared.

The warning light is the most important signal you see in everyday use. Illumination means the system has detected a fault, and you should not ignore it.

If airbags and seatbelt pretensioners cannot deploy in an emergency, this defect may be the reason. The warning light should therefore be checked promptly.

Which vehicles is the 98820-4AV0B fitted in?

The list of vehicles follows from the assignment to this part number. The airbag control unit 98820-4AV0B is fitted in these vehicles: Nissan Juke F15 (2010-2019).

The vehicles known to us for this number are listed below.

• Nissan Juke F15 (2010-2019)

Compare the part number on the label of the removed unit with this page, and you will know that it is the correct unit. Also have the fault memory read beforehand, because only this shows whether the control unit is defective or whether a plug or cable is behind the problem.

For the same vehicles, we also repair control units with the part numbers 285011034, 285012139, 285012905, 98820-4BA0A, 98820-4BA0B, 988201KV1A.

How does the repair of the 98820-4AV0B work?

First have the fault memory read and enclose the log. Then disconnect the battery, and only then remove the control unit. Finally, create a repair order online and send in the unit, well packed.

Airbag24 tests the unit on the test bench, repairs defective components and erases the stored crash data. A functional test completes the work before your own unit is sent back to you.

3–4 working days are normally allowed for testing, repairing and checking at Airbag24. 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 98820-4AV0B get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. After the repair, UPS returns the unit to you.

The printed repair order belongs in the parcel, and the unit should be packed shock-resistant.