Though I've been a member for years, my first post. I am considering an E60 and wonder if anyone could list "common problems" I might need to be aware of. My 1st choice is a 06 550i with 20K and a year left on the factory warranty from a broker. Other choice is a CPO from a BMW dealer 07 525xi with 20K and 2 years left on the factory warranty and the 2 year extension powertrain CPO after. Both cars carfax clean one owner and are in excellent shape after looking over. For performance reasons, the 06 550i appeals to me as a replacement for my 02 540i as I loved the way it drove, though it had mechanical issues that cost $500-$800 every so many months at the dealer near the end of my ownership. Power steering lines, radiator, etc. all listed as "common problems" that model and I had them. The 07 525xi is a nice car, but doesn't have the performance I really want but would be the "smart" choice beings it has so much more BMW warranty. I have read the CPO warranty in detail and know it is basically powertrain with some exceptions. Both cars are within $1000 the same price. I really like the 06 550i, color, equipment, wheels better than the 07 525xi (much more basic car) but if anyone could offer up any insight to "common problems" on either or both cars, it would be very helpful to my decision. I noticed a post about issue with a 06 525xi from Consumer Reports that got my attention. I am leaning towards the 550i and will buy it regardless of the warranty issue (I still get a year after all from the factory) as long as I am not too scared off. I don't expect it to be maintenance free after the year but don't want to buy a car with a long list of known issues I will have to pay for. Wife is leaning towards the AWD 525xi with the longer warranty of course. It moves, so V8 power does not matter to her nor does the higher level of equipment. We both like BMWs though (this will be my 4th since 91) and think the E60 will be a good addition to our family. I would be very interested in any comments from owners with 50K-60K plus miles and what they are seeing on repairs and costs.