No, it's pasted on to the back. Takes some patience to peel off and glue back on but do-able. I felt a little bad (and would not do it again) when I figured out (after the fact) that these people seemingly go out and steal the mirrors to order, but glad I got heated and anti-glare factory Euro mirrors.

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1988 325is (purchased new) sold
2004 X5 3.0 2005 X3 2.5
2008 X5 3.0 (new to me)