A rearview mirror assembly includes a main housing defining an exterior surface, an interior, and an open side, the exterior surface having a recess therein. The assembly also includes a control module coupled within the interior of the housing, a mirror coupled over the open end of the housing, and a communication module. The communication module includes an antenna electrically coupled with the control module and an antenna housing at least partially enclosing the antenna and coupled within the recess of the exterior surface of the main housing.