This electric mirror insert is the reflective glass assembly for the cab door mirror. It mounts in the mirror housing on the tractor cab and provides the driver with rearward visibility along the side of the machine. The glass element is electrically adjustable, allowing the operator to reposition the mirror surface from inside the cab. A cracked or delaminated mirror insert reduces the field of view and can cause blind spots along the implement or trailer. The manufacturer produces this insert to match the curvature and mounting interface of the original housing, so the glass seats correctly and the adjustment mechanism engages without binding.