These guys did not get a lemon.
It's a common problem with these cars.
Plain and simple BMW screwed up in the design /testing of these motors. Because of such BMW should replace ANY affected motor regardless of time or mileage if it is still titled for road use.
As much as these cars cost there is NO excuse for BMW giving people the run-around.
http://www.koalamotorsport.com/tech/...shortblock.htm