Mine is a 2003 (feb build) with 300000km on it, I wrench everything myself (with help and advice from the forum crowd! ) thanx, couldn't have done it without all of you!!
no major issues, just maintenance from an abused past! (first 200000km) she runs like a dream

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2003 X5 3.0i (02/2003) sport package, Sapphire black metallic / Black Dakota Sport seats. compass mirror retrofit, trailer hitch retrofit, Prodigy P2 trailer brake controller installed, PDC retrofit, Lumbar support retrofit. heated rear seats retrofitted. Running boards retrofitted and subwoofer install in progress. 4.8is Brakes installed front and back. Bluetooth TCU installed, Rear Fog lights installed. Retrofitted reclining rear seat backs.