Tire Rack shows the 18x8 fitment for the F30 as ET30. So, if the 17's are 17x8ET29, it should be no issue. Only other things to check are hub bore and of course the M Performance brakes need an 18" wheel, not 17"
__________________
| '13 328i M Sport - Estoril Blue | '12 300C SRT8 | '12 Wrangler Rubi Unlimited - COD MW3 Edition|
|