Need some advice. My 2001 X5 4.4 has a bumpy ride at about 30 mph. You can't feel the bumpy ride when going more than 40 or 45 mph. It seems worse on the passenger side. There are 97,000 miles on the car. It feels like a rim is bent, but I don't think a rim is bent. Could this be a bad CV joint? How do you check? Thanks for any input. CJ