Does this sound like it could be the same issue?
http://www.e90post.com/forums/showthread.php?t=760590
Haven't noticed it for a while so kind of ignored it but if it comes back i'd love to know how to fix it
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E90 335i xDrive 6spd, Nav, Prem, Cold Weather, & Sports package - Msport Conversion
Mods: JB4 + MHD, Doc Race ST, Pure 6266, AD-Eng PI/Mounts, Fuel-It st. 3, Custom Exhaust,
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