Airbag control unit with part number 98820-9UC1B

What does the airbag control unit 98820-9UC1B do?

The airbag control unit 98820-9UC1B forms the control system of the restraint system (SRS) at Nissan. It processes the signals from the crash sensors and decides within a fraction of a second which airbags and seatbelt pretensioners are triggered.

During operation it monitors components and wiring. If it detects a fault, it reports this via the airbag warning light in the instrument cluster.

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

Why does the control unit 98820-9UC1B fail?

The most common cause with the 98820-9UC1B is that crash data stay stored after an accident, even if no airbag has deployed; a normal diagnostic tool cannot erase them. Other possible causes are ageing electronic components, cold solder joints, moisture and corrosion on plug connectors, and voltage spikes.

Crash data stay stored until they are erased during the repair.

The other causes concern ageing, contact problems and voltage fluctuations, for example from a weak battery or a jump start.

How can you tell that the 98820-9UC1B is defective?

A defect in the 98820-9UC1B shows up as the airbag warning light, which lights up permanently or intermittently. Fault messages in the instrument cluster, no connection to the diagnostic tool, or a fault memory that cannot be cleared also indicate a defect. Airbags and seatbelt pretensioners may then fail to deploy in an emergency.

Pay particular attention to these signs:

• Airbag warning light on permanently or intermittently
• Fault message in the instrument cluster
• Diagnostic tool finds no connection to the control unit
• Fault memory cannot be cleared

Have these signs checked promptly.

Which vehicles is the 98820-9UC1B fitted in?

The control unit 98820-9UC1B is fitted at Nissan in the following vehicles: Nissan Murano Z52 (2015-2024).

The vehicles for this part number are compiled in the following overview.

• Nissan Murano Z52 (2015-2024)

Compare the part number on the label of the removed unit with this page. This only ensures that you have the right unit in front of you. Have the fault memory read out beforehand, because only this result shows whether the control unit is defective or a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 629198200, 988205AA0A.

How does the repair of the 98820-9UC1B work?

First you read out the fault memory and attach the log. Then you disconnect the battery, only then remove the control unit 98820-9UC1B, and create a repair order online before sending it in well packed. Airbag24 generally needs 3–4 working days for testing, repairing and checking.

At Airbag24 the unit is checked, defective components are repaired, crash data are erased and a function test is carried out. Afterwards your own unit is returned.

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 98820-9UC1B get to Airbag24?

You send the control unit 98820-9UC1B as a parcel to Airbag24 or book a UPS collection for an extra charge. After the repair Airbag24 sends it back by UPS.

You enclose the printed repair order with the parcel and pack the unit shock-proof.