I posted similar issues and solutions in OFH job in bimmerfest E39 5-series forum.

Some just ppl just leave it alone and it is fine since it is lowest bolt.

Just fire up the engine, drive for a few weeks to see if you have any oil leak.

PS: sometimes during removal, the bolt (steel) bonded with the threads (Aluminum) over the years, so the Aluminum threads come out with the bolt(s).

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