An exterior rearview mirror assembly for a motor vehicle includes a housing defining an interior and including a mirror opening oriented rearward when the exterior rearview mirror assembly is secured to the motor vehicle. A backing plate is operatively connected to the housing in the interior. The backing plate is selectively moveable within the housing. A primary mirror is fixedly secured to a first portion of the backing plate. A secondary mirror is fixedly secured to a second portion of the backing plate. The secondary mirror is spaced apart from the primary mirror. An adhesive member extends between the backing plate and the primary and secondary mirrors such that the single adhesive member secures all of the primary and secondary mirrors to the backing plate. A demarcation divider separates the primary and secondary mirrors. The demarcation divider is secured to the backing plate.