Patmobile Posted March 3, 2009 Share Posted March 3, 2009 My little Smart city car has developed a low pitched humming noise which has become quite noticeably louder recently. It varies in pitch with road speed and seems totally unrelated to engine revs or gear. Unfortunately, it resonates around the cab of the car so that it's impossible to tell exactly, or even approximately where it's coming from. At first when it was less pronounced, I thought it was just tyre noise. Now it has become so noticeable that I think it must be a wheel bearing. Does this sound likely?Any other ideas?Patrick Link to comment Share on other sites More sharing options...
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