A vehicular exterior rearview mirror assembly includes a mounting arm and a mirror head. The mounting arm is received through an aperture in the mirror head, and an actuator is attached at the mounting arm within the mirror head. The actuator is operable to adjust the mirror head relative to the mounting arm and includes first and second motors that drive respective first and second gears. The first gear engages an arcuate gear disposed at an attachment element attached at the mirror head, and when the first motor is operated, the arcuate gear and the attachment element pivot relative to the actuator to adjust the mirror head about a first pivot axis. The second gear engages a rotationally fixed gear rotationally fixed to the mounting arm, and when the second motor is operated, the actuator travels about the second gear to adjust the mirror head about a second pivot axis.