I was trying to help my mother in law interpret what is covered and not covered by CPO. I was pretty confused after reviewing the PDF file online and called the toll free number as well. The sense I got is that the dealer, although sometimes they'll get a diagnostic code which is covered by CPO, has all of the disgressionary power to say something was "influenced by external forces" or that it's "wear and tear" and refuse to cover. I was a bit embarrassed and frustrated that my mother in law's 525i, which was touted as this great CPO car with such a great coverage has been denied three times now for various reasons. In addition, the car had a bunch of issues when we inspected it pre-purchase which we had to point out.Later on (when it had a flat), the rim was pretty much "welded" to the axle because it was never taken off and inspected...I thought CPO inspection looks at brake pads, not sure how one would do that without taking off the rim. All in all, I will never purchase CPO. Seems like a nice way for the dealer to pad their profit margin and never pay for anything.