OP,
strut top mounting bolts are 18mm and not sure if they are single-use "stretch" bolts or if you can use them - I'd buy new just to be safe.
Strut brace mount bolts are external T20 torx 10mm bolts c/w collar and are single use only.
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Fettled M135i EB AT then AW M2 DCT - both gone but not forgotten:
Current '22 X3M LCI..
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