A heater pad for a variable reflectance mirror reflective element of a vehicular mirror assembly includes a flexible substrate, an electrically conductive heating element, and first and second electrically conducting elements. The first electrically conducting element is in electrical connection with a transparent second surface electrically conductive coating of the equipped mirror reflective element and the second electrically conducting element is in electrical connection with a third surface electrically conductive coating of the equipped mirror reflective element when the equipped mirror reflective element is normally equipped with the heater pad. The electrically conducting elements and the heating element are electrically isolated from one another. The heating element and the first and second electrically conducting elements terminate at an electrical connector that is configured to electrically conductively connect with a wire harness that provides electrical connection to at least one of a power source and a control circuit.