my m3 makes this odd rubbing noise SOMETIMES, i dont know what it is. it comnes from the front only when i turn right, and the back when i start off slowly,

ive noticed it like a few times

it almost sounds like the same sound when your on a bike and you barely touch the brakes,

hmmmmm....

My 323 makes the same sound! I have no idea what it is but it does it under the same conditions, turning and backing up.