^ thanks. I just called 2 Firestones (before reading your post Zoich) and neither of them were able to register the battery (one didn't even know what that meant). The battery was not available either and it would take 2 days. But since they can't register, I'm not going with them. I called a local place I usually use who still recommends a dealer original battery for $320 out the door. I may also go the Advanced Auto Parts route but then I'd feel more comfortable if I could get it registered.

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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