So far I really haven't done much other than normal maintinence. Brakes, spark plugs, I have AFE filter. I run Royal Purple oil in motor and tranny. I am still on original water pump. I have to replace my front wheel bearings soon. Replaced the alternator around 125,000. Oh here is one thing I never take it to the BMW dealer ,so I dont see all the nice new car and want one. Thanks to X5World I do most all the work on my car....and I am not a mechanic. Hats off to the site!
My one piece of advice is drive your X5 like it is truely the Ultimate Driving Machine. There isn't one day of driving that I don't hit 100mph. And every month I make sure that the governor still works.
It stops me at 135.