My 07 E92 was built August of 06 and just turned over 40K miles. And I'm far from stock - I work from home and don't put that many miles on it. When I do drive it, I don't abuse it, and thus far, the only repairs BMW has made are HPFP and a steering angle sensor, both under warranty. So not everybody's early N54 "blows up" at 45K miles - it may be next year before I get to that point, but I'm not anticipating any trouble.
In the case we're discussing here, I don't think we're getting the full story.
2013 F30 335i M-Sport 8AT/MPE/MPPK, 2011 128i M-sport Cabrio 6MT/PE