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I think having the right battery coded in is a must if you have IBS (which I think all 1 Series do). Registration might be only so you can get a good readout on battery condition in INPA. Or it might be really important. Sorry for not being much help.
Registration is so easy I'd go ahead and do it.
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E82 / BMWP Springs / Koni Yellows / M front control arms / Adjustable front endlinks / M rear guide rods / Whiteline Poly RSFB
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