3-Series (E46, E90)Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.
Does anyone have any idea why I hear a high-pitched whine whilst I'm steady at any speed over 40mph. I only hear it if I maintain a steady speed with the accelarator pedal lightly touched - put my foot down more, or take it off, and the whine disappears. I drive a 2003 320iA (Canadian) with 14,000 miles on the clock. Thanks
I own a 99 323i and have this exact same problem. The first time I reported it to the dealer (at 55K) they found that a vent valve diaphram had ruptured and replaced the vent valve intake hose, the exaust hose, and the vacuum supply hose. This didn't correct the problem and when I brought it in again they claim that they didn't hear the sound. It was more intermittent then and much more consistent now (at 65K). At my next service I plan to bring it up again.
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