That happened to me not too long ago. The window cost me around $92, it was the tinted one, purchased from a dealer. It even had the little BMW sticker on the bottom corner, which was nice because it still matches all the other windows. My wife didn't want me to install it, so she paid the dealer

http://www.x3world.com/lounge/8759-x...ed-advice.html

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*2010 X5d - Space Gray/Black Nevada/Dark Bamboo|ZPP|ZAP|ZCW|ZTP|ZRC|322|328|386|4NC|4UB|655 |6FL
~Ordered 8/27; Production began 9/28 at 12:20pm; Completed 10/7; Delivered 11/4!~
*2008 535i Black/Black - Dinan Exhaust & S2 Software
*1995 318ti Clubsport - Hellrot Red (autocross/fun car!)
Past: 2005 X3 3.0i; 2009 335xi