My mother owned the car from new and had to replace the Universal Joints and Center Support Bearings 1 year prior after a new engine was installed but that's another story. I had to do the same thing, 3 U Joints and a Center Support bearing which is only from the dealer when you speak to the local auto parts stores and would have been a total of $400+/-. Luckily, I shopped ebay and found some a little more reasonable. They were all installed and lo and behold.....the vibration is back and upon inspection, the midshaft or center support bearing has eaten into the driveshaft. This could prove to be very dangerous. Thinking we all need to ban together for a class action law suit since Kia doesn't seem to know how to help us...