So i have had this annoying issue with my 9-3. My car will shake and shudder at any speed over bumps whether i am coasting or accelerating. It is soo annoying. It feels like my car is a POS. I thought it was a strut because it comes from the front of the car and resonated through the entire cabin but I think the strut is fine. I have not investigated that much because it blows my mind. lol. Can a bad engine mount cause this or is it something entirely different? I hate it!