I have a 135i Full bolt ons and I recently got my turbos changed under warranty
for blown turbo seals on Dec 15th 2012. About 2 weeks ago I started to hear this weird annoying bird chirp rattling sound. The car is at te dealer now
The tech lubed up and adjusted the wastegates but they are still making that noise . It makes the noise when I first start it up and I rev it a little and let the peddle go and lasts about a minute, after that you can't hear the noise anymore and the turbos boost and hold boost perfect .This is really annoying lol
Please post any comments or suggestions.