A vehicular exterior rearview mirror assembly includes a mounting structure, a mirror reflective element, a mirror back plate, a heater element, and a blind zone indication module. The heater pad is disposed between the mirror back plate and the mirror reflective element. The blind zone indication module is located at an aperture formed through the mirror back plate. The blind zone indication module includes a housing that houses a circuit element and a light source. The circuit element includes electrically conductive terminals that are in electrical connection with circuitry of the circuit element and that are disposed at a connector portion of the housing that is configured to connect to a wire harness to electrically power circuitry of the circuit element when the vehicular exterior rearview mirror assembly is mounted and used at a vehicle.