Exterior mirror with indicator

A mirror reflective element sub-assembly suitable for use for an exterior rearview mirror assembly of a vehicle, said mirror reflective element sub-assembly comprising:

• a mirror reflective element;
• a mirror back plate attached to the rear of said mirror reflective element, said mirror back plate formed in a plastic injection molding operation and having an indicator receiving portion established thereat by said plastic injection molding operation;
• a signal indication module having a light source that is activatable to emit light, said signal indication module attaching to said indicator receiving portion of said mirror back plate and said light source being activatable to emit light through said indicator receiving portion;
• and
• wherein said light source is disposed at a circuit element and said signal indication module includes a housing that substantially encases said circuit element therein, said circuit element comprising electrical terminals extending therefrom and protruding at least partially at a connector portion of said housing so as to be electrically connectable to a power source of the vehicle, said connector portion of said housing being configured to provide a plug-socket connection between the power source and said signal indication module.