Interesting. What is the source of this reliability metric?

Consumer Reports auto statistics for 2011. They are actually based on user surveys so they are generally pretty accurate. Every car I've ever had that was reliable or not has corresponded to their results. My Infinity G was my least reliable car and it's listed as the least reliable car that Infinity makes for the last few years.

consumerreports.org

Note: I think you need to be a premium member to get to that report but somehow I can link it here directly.

Note #2: In Porsche's defense, the Cayenne like most SUVs, is a total piece of shit. I wish consumer reports would make a separate SUV section because half of the crappy cars list every year for the last 5 has been full of SUVs.