We inherited a 2001 x5, 4.4. It is a CA car, pampered by a car nut with a 111,000 miles. We are also car nuts and had it shipped to MI where we live and it has been a pain in the ass since. Door locks, slide return had to be replaced. Window motor had to be replaced, abs sensor has to be replaced now. We love the car, but is it going to get progressively worse? Should we keep it or sell it? Another question is should we replace the transmission fluid and filter?