So, the question is: "why did your engine fail?"
You are adamant that it was not a mechanical over-rev. However, there seems to be at least some evidence to support this theory.
What then is your diagnosis, and what is your supporting evidence?
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Current: 2006 E46 M3 'vert 6-sp 2008 E60 M5, 2011 E92 328 6-sp, 2011 E70 N55, 2012 E71 X6M
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