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The glass in the LH (passenger) door mirror of my 2002 IS300 Sportcross has recently developed what looks like an ink-stain in the bottom right corner. I can't yet judge whether it is spreading and getting any larger. It looked initially as if it was simply the "silvering" on the back of the mirror coming off, or corroding in some way. But a browse on this and other Lexus forums and websites has revealed the cause of the problem, and it seems to be unique to IS300s. All IS 200 and 300 door/wing mirrors are electrically adjustable and heated and - in general - the entire mirror assembly from an IS200 will fit an IS300 and vice versa. But here's the key point. The mirror glass in the IS300 units is also "auto-dimming" (photochromic). It is the same stuff as in those "transitions" spectacles and sunglasses which go dark in direct sunlight and lighten up indoors. This is thanks to some LCD-type molecular chemistry technology involving silver halides. Apparently the "staining" in IS300 mirror glass occurs when this chemical compound in the glass deteriorates. It's not exactly a leak of liquid, but something similar. It is apparently irreversible. So there is no alternative but to replace the glass (which can be done, with care....), or the entire assembly. So to my questions. Can anyone advise the specific part number for a 2002 IS300 LH mirror glass (ie the one which is autodimming/photochromic as well as having the heating element)? I need the UK part number, as the US parts catalogues are different since LH is the driver's side. And if anyone has wide experience of replacing these mirrors: is the wiring connector for the mirror glass the same for all of them - IS200 and 300? I am assuming it is, since the photochromic feature does not depend on a power source, so all the mirrors should simply have wires for the heating element. NB I am referring to the connector off the back of the glass, not the wiring connecter for the entire assembly which comes through the doorframe and also includes the connections to the motor I am hoping to find a genuine used IS300 mirror unit or glass off the well known online auction site. But if I have to settle for an IS200 mirror without autodimming as a replacement, I just want to be sure that the wiring connector will fit.