Well written and quite comprehensive. It covers basic information about the difference in model years from 2004-2010 to detailed repairs from their own teardown of A BMW X3. From oil changes to rebuilding the transfer case. This is the only emanual to cover the model and a must have for the do-it-yourselfer to the professional tech. They are wonderful vehicles that will last for years when maintained well, which this manual serves as an aid. As an ex-2004 & current 2007 3.0 X3 owner this is a welcome addition to my library as I plan to keep my X3 for years to come.