 I bought a CPO 2008 528 xi a year and half ago and have had quite a few issues that I think I shouldn't have for a car that is 4 years old.The driver side sport seat stopped working correctly. A couple months ago my battery died. $460 to replace that.You cannot do it yourself.It needs to be paired with the electrical devices in the car.This week my AC went out.Turns out there was a leak in the AC system and while my car was getting repaired they discovered a leak in my transmission.The tires that don't go flat cannot be repaired.Be prepared to buy a new tire and hope they have one in stock or you are out of commission until they get one.