So I just went on a little drive and then did the 1000-2000 RPM test in the garage, and I hear a little ticking too. Not valve noise, because it's erratic. It almost sounds like the sound of exhaust cooling. My car has about 5300 miles on it (2011), but it drives like a champ... the engine seems to be getting stronger. I have a hard time believing this noise is anything serious. If a bearing was faulty, wouldn't there be other symptoms, like rough idle or loss of power or something?
God I wish I had never looked at this thread...
2011 M3 Sedan / Space Gray / 6MT / Few Frills / Low Weight / Lots of Fun