I have a brand new, in box replacement mirror for left/driver side of an S197 mustang. If your mirror is damaged or the motor stopped working, this will bolt right up and start working with ease. Simply remove and replace the cover if your car is not black (the covers are plastic and pop off with a screw driver).
My S197 was hit and totaled, so I have no need to use this mirror replacement. It's still in the box.