A motor vehicle includes mating features in a sheet metal of the motor vehicle, an exterior rear view mirror assembly fixedly secured to the motor vehicle, where the exterior rear view mirror assembly includes a structural base frame that mates to the mating features of the sheet metal at a mounting plane, and a tuned mass damper secured to the structural base frame adjacent to the mounting plane. In an example, a primary axis of movement of the tuned mass damper is at least one of substantially parallel with or substantially perpendicular to the mounting plane. In another example, the tuned mass damper is configured to dampen resonant vibrations being generated by the motor vehicle.