The day I purchased the 2017 Dodge Caravan and took it for a spin, I didn't notice the vibrating seats. A week later, at a higher speed, I noticed all the back seats vibrating significantly. I took it in for repair and they replaced the seat latches but the problem did not go away. Since then, I have had two tires replaced and balanced. The problem continues and every time some rides in one of the back seats, they complain about the vibration.