Quote:
Originally Posted by hellrotm
Fraction of a percent, if that. Completely over blown. Yet to this day meet someone in person who has had the problem. Even with the endless amounts of bmwcca meets and trackdays I have attended. Not just S55 powered cars, N55 uses the exact same crank hub parts. Everything is forum only. Absolutely nothing compared to rod bearing issues of S54, S65, S85.
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Definitely agree it's not like the widespread S65 issues. Just a question of if you want to risk a $20k repair bill or whatever they charge for a new S55.
Still, despite the fact that the crank hub part is the same, it's possible there are additional vibrations or harmonics that make it worse in S55.
Not trying to overstate the risk, but it's non-zero.