I too read about the re-torque from their instructions (which I've since tossed). I'd like to know the torque spec BMW recommends... I've heard it is 80-100 ft lbs from a few people as well as other models' forums (for 3 series) ? I've driven a few hundred miles without re-torquing so far... been putting it off.

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'08 X5 3.0si - Alpine White / Saddle Brown interior
Specs: Sport Pkg, Premium Pkg, Tech Pkg, Comfort Access, Aero Kit, Style 433 staggered 20s on Conti DWS
Mods: Carbon 35 tint, LED angel eyes, GP Thunder 7500k fogs, H&R 20mm/25mm spacers, clear reflectors, gunsmoke-tinted taillights
Coded: Digital speedo, windows/sunroof/tailgate close via keyfob

X5 pics at Flickr