Originally Posted by ipitythefoo
I was just wondering if you had the issue resolved? If so, what did you do?
The same happened to me except I get a minor ticking sound from the engine at lower rpm.
It was a faulty exhaust camshaft position sensor. My engine wasn't making a ticking sound at idle though, nor was the power diminished. I also replaced the Vanos sensors while I was at it as these sensors tend to go bad in all BMW's as Dack mentioned above. here's the link to the camshaft position sensor. The exhaust and intake are both the same.
2009 328i E93: Sport suspension, Carbon fiber performance spoiler, Lux AE's, K style carbon fiber front lip spoiler.