Quote:
Originally Posted by I Wanna go Fast!
Turbo lag is almost none existent these days and I would never own any M engine out of warranty anyway.
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Speaking of out-of-warranty issues with POS engines, my N54 turbos were toast at 60k miles (need replacing) while the S54 from my old E46 M3 was still fine at 125k miles and not one issue before.
The naturally aspirated M engines have been very reliable - they are built as tough as a bank vault. S65 will be no issue out of warranty either, that I would bet on. I am leary at best about the upcoming "S55" turbo.