I haven't done anything to it after re-filling with my own fluid 2 weeks ago and the frequency it occurs has gone down. But it still does occur on occasion - probably not enough for a tech to find it in 1 test drive.

Is it even possible that OVER TIME the now-sufficient fluid fixes this? Is it even possible this had to do with the PS pump?

EDIT>> i was wrong - it still happened

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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