Wow, I see a lot of different issues. The issue I am having isn't mentioned. It has this vibration at very distinct speeds., 25-29, 45-49, 59, and more. It is very noticeable when accelerating smoothly, non aggressively. The vibration is so prevalent that it is felt in the seat and throughout the steering wheel. It has been to the shop twice, the last time I took the mechanic with me and he witnessed the vibration at the low speed, we didn't get on the highway at higher speeds. I left it with him for a day, he states its the DFM switching back and forth with cylinder deactivation. Seems odd to me that it does it a those exact speeds and its constant when at those speeds . Anyone else experience this?