Hey guys! This is my first post here. I am looking to buy an X5 and was wondering what year models to stay away from? Any bugs, complaints, etc?
Is there anything significantly different between the 2007, 2008, and 2009 models?

Would a 2007 3.0si be a major downgrade from a 2009 xdrive30i?

Sorry for all the questions. I just want to be fully educated in my options!

Thanks in advance!