I have an '05 X5 with 130,000 miles (yes, I am the original owner). I would advise changing your fuel filter and looking at the plugs. In the future you may want to look at a regular schedule of TECHRON every 3,000 miles with your regular maintence.

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Travelin' Man

2005 X5 3.0i
140,000 miles and still Travelin'

Sapphire Black / Sand Beige Leather / Navigation / Sirius / Cold Weather / Premium / Auto-Dims / Rear Climate / Adaptive Xenons / AFE Cold Air Induction / Ipod Interface / Rear Climate /