This is also an issue with the N55 in the E70. OFHG gets changed and the engine dies shorty after. I have seen more reports on those forums than here. E70 owners run their miles up faster than E90s so the problems bubble up faster on that model. BMW sold a ton of E70s with the N55 from 2011-2013. It was the E70 version of the 328i. I expect BMW to issue a bulletin once they figure out the root cause.
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