2003 Kia Optima Vibrations Just Won't Stop

And to add I replaced all 4 tires brand new, A 4 wheel alignment, and all 4 struts.

The rack and pinion steering system coupled with a faulty CV repair. I would also have them look at the ball joints, and the control arms. It does not sound safe to drive. Take it to the Kia Dealer for the diagnostic. Its going to cost $100-$200 but they will tell you EXACTLY whats wrong with it. I always recommend the dealer, and some people give me a hard time. But i prefer a job done right, the first time, even if it costs a little more. How many miles on this car?

57,000 bought it from the original owners but they weren't much help they were both over 90

The vibrations were before the cv repair they just didn't make it better but not worse either

Tie Rods are the other thing I would look at. Seriously, your best bet is to get it into the Kia Hyundai Dealer and have them look at it, instead of guessing and dumping money into a car thats already not worth much, I would spend the $100-$200 on a full dealer diagnostic before proceeding. Did you pull a CarFax? Has the car been in an accident? rebuilt title?

Yes I think I will but yes I did pull a car fax car had never even been in a fender bender always been serviced same place on time and no title is clean just actually got my new one