A mirror assembly comprising a mounting bracket for attachment to a vehicle exterior; a first pivot plate on the mounting bracket having a concave upper surface with a series of grooves formed therein; a support arm pivotally carried on the first pivot plate of the mounting bracket; and, a second pivot plate carried by the support arm having a base surface with a plurality of protruding teeth engaging the grooves in the first pivot plate so that a pivot gap is defined between the upper surface of the first pivot plate and the base surface of second pivot plate; whereby the pivot gap allows the teeth to both pivot and slide in the grooves of the first pivot plate so that the support arm is pivotal in a multi-axis arrangement with the mounting bracket to accommodate misalignment between the mounting bracket and the support arm during installation on a vehicle.