According to realOEM, the clutch and all of the related parts are the same on the E60 5', E46 3, E83 X3, and E53 X5(Facelift). The only thing that doesn't match is the actual clutch kit. I wonder why..

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2004 X5 3.0 6 Speed MT
Build Date - 09/03
156K Alpine White / Black
Premium & Cold Weather Packs, Nav,
Tons of lighting mods, 4.8is Exhaust, Headers, Eibach Springs, OEM 87's, Custom DME Tune, OEM Hitch.

2005 X3 3.0i - 100K - Blue water Metallic / Black

2005 X5 3.0i - 140K - Alpine White / Hellbeige 2