Reverse Tilt Mirror
WARNING: This page is about a different car, the 2005 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.
When the door mirror switch is set to L or R and the transmission is shifted into reverse, the selected door mirror will tilt downward. The door mirror will return to the original position when the transmission is shifted to any position other than reverse, the door mirror switch is set to N or the ignition switch is turned OFF.