I have the same problem with mine. Dealership could not replicate the problem. Low speed clunk over speed bumps and potholes. It has to be in the struts or swaybar end links. This is my first ford ever owned bought brand new and kind of dissappointed with it. 2000 miles and problems the dealer cant find. Traded in my 03 mazda protege that i purchased new. Never had any problems at all had 115k when i traded it in.