Besides new tires (sport package staggered 19's) and regular maintenance like lube, air and oil filters:

Trans oil cooler
Trans thermostat
Expansion tank
Expansion tank cap
Radiator
All coolant hoses
Alternator
A/C compressor
Alternator belt tensioner and pulley
A/C belt tensioner and pulley
Deflection pulley
All belts
Steering column coupler joint
Tie rod assemblies
Torsion strut bushings
Front outer axle boots
Rear hatch soft close mechanism
Tail lights
HID ballast
Front driver outer door carrier
Door weatherstrip clips

Oh, and cup holder tabs

Got the truck at 28t miles, now at 46t miles.

Now looking at:
Valve cover and spark plug hole gaskets
Front window regulators
Engine oil pan gasket
Coolant thermostat (starting to run a bit cool)
Radio LCD screen

All from the top of my head, I'm sure I fixed and need to fix more stuff on it lol!

__________________
04 X5 3.0i auto
03 X5 4.6is