I have had my Sorento for almost two years and at first I loved it but after my first service it started hesitating at steady speeds or slowing down. They can't fix it because they only hook it up to a machine that tells them what is wrong and it shows nothing so they keep sending me home with the problem. I have learned a lesson about KIA's and that is to run as far away as you can get from them. They are junk. I know things happen with vehicles but normally you can get them repaired. I hate it. If you buy one you better beware because they are not worth anything when you try to trade them in.
stop making a vehicle you can't repair. Hire real mechanics not just part changers.