Airbag control unit with part number 98820-4ED0B

What does the airbag control unit 98820-4ED0B do?

The airbag control unit 98820-4ED0B is the central control unit of the restraint system (SRS) for Nissan. It evaluates the signals from the crash sensors and decides in an accident, within milliseconds, which airbags and seatbelt pretensioners are triggered.

During operation, it monitors the entire system. It reports faults via the airbag warning light in the instrument cluster.

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

Why does the control unit 98820-4ED0B 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 at plug connections, and voltage spikes.

The crash data remains in the unit after the event and must be removed in a targeted way. Airbag24 takes on this step during the repair.

The remaining causes are linked to the ageing of the electronics. Solder joints can be cold, moisture attacks plug connections, and a weak battery or a jump start causes voltage spikes.

How can you tell that the 98820-4ED0B is defective?

A defect shows itself through the airbag warning light, which stays on permanently or intermittently, a fault message in the instrument cluster, no connection to the diagnostic tool, and a fault memory that cannot be cleared.

In an emergency, airbags and seatbelt pretensioners may then not trigger. Take every one of these indications seriously, even if the warning appears only intermittently.

The warning light shows the finding directly. It is the signal that should lead you to have the system checked.

Which vehicles is the 98820-4ED0B fitted in?

The control unit 98820-4ED0B is fitted in these vehicles: Nissan Qashqai J11 (2013-2017) and J11 Facelift (2017-2021). You can check whether it matches your car by the label on the removed unit.

The vehicles in detail:

• Nissan Qashqai J11 (2013-2017)
• Nissan Qashqai J11 Facelift (2017-2021)

Compare the part number on the removed unit with this page, so that you have the right control unit in front of you. Also have the fault memory read out. Only this result shows whether the control unit is defective or whether a plug or a cable is the cause.

For the same vehicles, we also repair control units with the part numbers 685104EH4A, 685204EH0A, 68520HV00A, 988204EH0C, 98820BK00A, 98820BK10A.

How does the repair of the 98820-4ED0B work?

First, you have the fault memory read out and attach the log. Then you disconnect the battery and remove the control unit. Afterwards, you create a repair order online and send the unit in well packed.

The removal takes place only after the battery has been disconnected. Keep to this order.

Airbag24 checks the unit on the test bench, repairs defective components, erases the stored crash data and carries out a function test. Checking, repairing and testing takes 3–4 working days as a rule. Afterwards, your own unit is returned 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 98820-4ED0B get to Airbag24?

You send the control unit 98820-4ED0B in as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

Put the printed repair order into the parcel. Pack the unit so that it is shockproof.