The 2006, and 2007 Honda Civics have a rear suspension geometry problem that causes rapid rear tire wear, roaring noise from the rear and vibrations at highway speeds. See Honda Service Bulletin 08-001. Mine has had this problem and working with the dealer and Honda America it still hasn't been resolved. Looking at blogs it seems to be a common problem that has caused a few accidents and worries over possible fatal accident occurring with tire separation.
Honda needs to fix the problem and the government needs to do a recall.
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