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      03-11-2014, 05:16 PM   #2
tmarshall57
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Drives: E90 330d
Join Date: Apr 2008
Location: Bury, Lancs, UK

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Mine makes a similar sound at low speeds - frequency proportional to engine speed. I think my issue is worn belt tensioners on the serpentine belt. I plan to replace belt, idler and tensioner during the next few weeks.
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e90 330d, Montego Blue, Beige Dakota Leather, Auto, Nav Pro, Bluetooth Prep, BMW Connected Drive, Voice Control, Sports Seats, Split Rear Seat, 18" Ellipsoid Wheels Style 162 Burr Walnut Trim
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