My passenger side mirror's auto dimming layer has been faulty since I bought the car. Tried to search for mirror plates, but couldn't find any except the full mirror assemblies with housings. Wich I don't need. So I decided to fix it myself. I detached the mirror plate from the housing. It is pretty easy - you just put the mirror in the upper position and put the flat screwdriver or a small flat trim removal tool under the mirror and it just pops out - no wonder car part thieves are stealing the mirrors from Lexuses and Porsches in huge numbers in my country. The dimming film is located between the mirror glass and the front glass. Mine became oxidized because the hermetic on the side of the mirror plate assembly was damaged. To fix this I had to separate the two glasses using a sharp blade. You can observe the gooey material on the mirror - that's the dimming film. To remove it I used paper towels soaked in acetone-free nail polish remover (organic solvent) After a thorough cleaning the mirror is as good as new (minus the auto dimming feature, of course ) To avoid the small space between the frame and the mirror glass after removing the front glass, I used a thin rubber tape on the inside of the mirror frame thus achieving the kind of a hermetic seal. And the mirror is fixed. Sincerely, Simonas R.