Quote:
Originally Posted by Helmsman
Woah, lets not make it sound like rod bearings are a must to change on this engine. There are piles far over 100k miles running happy out there mate...
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The secret is oil analysis.When high levels of copper start showing up it's time to do a prophylactic rod end bearing job (ca. $5,500). While I presently have <9,000 miles on my M3, I will start oil analysis at 45,000 miles.
In practice, cars that have been tracked are generally the ones that need premature rod end bearing replacement. This is because we do not have dry sumps - under sustained centrifugal loads in corners the oil in our engines slosh up against the side of the pan - away from the rod ends.
FWIW in OP's car search, 2011.75 - 2013 are the same car.