[clivem2]

Originally Posted by GAaaAR

Are you sure if the noise goes away it's not the wastegate? I just got my 2009 335i last week with only 200 miles so far and I'm also noticing a ticking noise during cold starts while idling. The noise seems to be near the front driver's side of the car. I can hear it well when I have my head next to the Driver's side front tire. Once my car warms up, I parked my car and tried to listen near the Driver's side front tire again and the ticking noise is gone.

I hope this is not wastegate rattling! As mentioned before i only have 200 miles on my car.

This guy also had rattling noises during cold starts and it turns out he had the wastegate issue!

http://www.e90post.com/forums/showth...light=rattling

This ticking noise will be the piezo-electrics in the fuel injection. Mine so loud it sounds like a diesel. But it is "normal". At least it sounds like that's what you're hearing. It can also be the cam-lifters not being full of oil, when this happend the ticking last for about 20 secs from a totally cold start.