Originally Posted by Riley1524
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.
did you replace the sensors yourself or have them done professionally??