Sorry for the late bump, but I was searching for this. The posts doesn't really give me a definitive answer so I decided to look it up online and share what I found. On BMW's website, the specs for the 2012 x3 is here:
http://www.bmwusa.com/Standard/Conte...Specs/DOT.aspx
It says both models comes with Privacy Glass, which I can safely assume is tinted windows.