The LDW camera sensor is on the windshield ahead of the rearview mirror.

To turn LDW on and off, press the LANE DEPART button on the steering wheel. The control indicator will light when LDW is on.

When the vehicle is started, the LDW indicator on top of the instrument panel to the right of the steering wheel will come on briefly.
LDW operates at speeds of 56 km (35 mph) or greater. If LDW is on, the LDW indicator will appear green if the system detects a left or right lane marking. This indicator will change to amber, flash, and three beeps will sound if the vehicle crosses a detected lane marking without using the turn signal. These beeps will be sounded from the left or right side, depending on the lane departure direction.
Lane Departure Warning (LDW)
When the System Does Not Seem To Work ProperlyRear Vision Camera Location
The camera is above the license plate.
The area displayed by the camera is limited. It does not display objects that
are close to either corner or under the bumper and can vary depending on vehicle
orientation or road conditions. Displayed images may be closer or farther than they
appear.
...
Airbag Front Passenger Presence Sensor Replacement
Airbag Front Passenger Presence Sensor Replacement
Callout
Component Name
Warning: Replace the passenger presence system as a complete
assembly to prevent possible injury to the occupant. All the components
in the se ...
Basic information
Touch screen display
WARNING
Failure to follow proper Nissan Armada RearView Monitor usage instructions
may result in serious injury or fatal accidents.
The Nissan Armada RearView Monitor is an assistance feature and must
not replace proper driving practices.
Always visual ...