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      08-25-2020, 10:34 AM   #2
lowrydr310
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Drives: 2006 325i, 2006 330i
Join Date: Apr 2013
Location: Los Angeles

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I had this thud sound too. Visually my thrust arm bushings looked fine, I twisted and even used a prybar and couldn't find any free play, but I went ahead and replaced them anyway because I had all the symptoms of failed bushings (random vibrations at various speeds, thud when hitting bumps, thud when braking sometimes). It wasn't immediately obvious just from looking at everything mounted, however after removing the thrust arm it was very obvious that the bushings were trashed. Huge cracks. All the symptoms were gone after replacing with new parts.