Fit System 88163 Mazda3/Mazda6 Left Side Power Replacement Mirror Glass with Backing Plate Replace your cracked or broken driver or passenger side mirror glass at a fraction of the dealer cost Easy two step installation: Pop out the mirror backing plate with the the broken glass attached, then snap in the new backing plate Wiring harness must be unplugged from existing backing plate and plugged into the new backing plate before installation Original equipment quality, fit, and function