In my 1998 528i, FRONT wheel bearings bolts...BMW manual says replace them.

All BMW mechanics I know re-use them. I re-use them, they are as big as the wheel lugs.
That was 10 years ago, the bolts still hold the bearings just fine.

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1998 E39 528i 5sp MT
2006 E53 X5 3.0 6sp MT