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Add mine to the list as well. Same noise I discussed in another thread where it was generally considered normal. Goes away after warmed up. Still wish someone smarter than me would figure it out. The only intel I have so far is that it gets louder when you crack open the oil filler cap while running, so it would appear to be internal. Sorry, I know that's not much of a clue.
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2011 E90 335i M-Sport, PPK, cp-e CP, Helix stepped FMIC, xHP stage 3, Wagner catted DP, MHD stage 2 E30, GFB DV
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