Just picked up a 2016 F80 M3 with 45k km. The car is completely stock and I plan to keep it that way for now. But ive been reading about the S55 crank hub issue and its freaking me out a bit.
Is this something I should proactively fix or only worry about if I tune the car? Some people say its only an issue with high boost tunes, others say it can happen stock.
What are you guys doing with your F80s?
If youre staying stock, the risk is very low. The crank hub issue mainly affects cars that are tuned and see repeated high-RPM pulls. BMW updated the crank hub design in later production runs too.
That said, if you ever plan to tune it, do the crank hub upgrade FIRST before any power mods. Its not worth the risk.
I tuned my F80 to stage 2 without doing the crank hub first. Biggest mistake ever. Hub slipped at 8k km after the tune, engine needed a full rebuild. $15k lesson learned.
If stock, youre probably fine. But if you ever go stage 1+, do it.
Check your production date. Cars built after 06/2016 got the updated hub from factory. If yours is early 2016 production, it has the old design.
For stock use its really not something to lose sleep over. Enjoy the car.
Mine is 03/2016 production so probably the old design. Ill keep it stock for now and enjoy it. If I ever decide to tune ill do the hub first. Thanks for the real world experience guys
just adding my 2 cents - ive had my F80 since new, 2015 build, 78k km, stock tune. zero issues with crank hub. these cars are built to handle their stock power output. the problem is when people push 600+ hp through them
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