'06 4.4 clocked 111,111 miles, traded in December for 2015 F15 35i. Tranny fluid changed at 100k, ran smoother after that. Only major repair expense was alternator replacement, broken driver side door handle and rotted windshield upper trim.
Was a very good X5 until i noticed white smoke after idling for some time, then i notice oil leak back of right bank. i figured its a good excuse to get new X5, wife agreed so i got the new one.
Now, i miss the roughness and quick acceleration of a e53.