My 2003 CR-V vibrates at around 52 mph. The vibration is felt thru the steering wheel, but the dealer's quality expert thinks the source is at the rear and, when I ride in the passenger seat, it seems to come from the rear of the vehicle. Dealer has inspected and balanced the wheels/tires twice, rotated wheels/tires, temporarily replaced tires with new tires of the same make, and replaced the drive shaft with no improvement. Most peculiar is that it is much worse on cool mornings when the tires are cold. Greatly reduced, but still noticeable on warm sunny afternoons when the tires are warm. Sounds like tires to me, but all tires have been temporarily switched to new ones with no benefit. Any ideas? Thanks, Carl