I too have had the knocking sound/feel when turning left. This was at about 35000 miles. I believe the wording of the problem involved the intermediate steering shaft?? Also before that I had problems with the turn signals not working all the time. It took two trips to the dealer to fix that. If it were not for the mechanical problems, I would keep this car forever. I love the overall car. The ride and the handling is great. I am getting 27 mpg which is outstanding for the size of the engine.
3.8 engine, gas mileage, steering wheel controls, power seats for driver and passenger, auto dimming rearview mirror
Rear a/c vents or better placement of the front vents