How does a 130,000 mile M4 engine look inside? Evolve S55 Billet Crank Hub Fix
Matt bought his F82 M4 with 125,000 miles on, and has done 5000 trouble free miles (other than 2 oil top ups...)
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Fixing the F8x M2 / M3 / M4 S55 Crank Hub Slip - Evolve 4 Pin Billet Keyed Crank Hub Upgrade
Every BMW M Engine seems to have its Achilles heel, and for the S55 it is the Crank Hub! This issue has plagued owners, especially those looking to get more power out of their turbo M car.