In this article, we will examine the 2006 Sonata versus the 2011. It should also be noted that Hyundai has cooperated with the National Automotive Service Task Force in a thoughtful way. Hyundai and its other company, Kia, are the only car companies that post all their service information on their Web sites for free. Every wiring diagram, technical-service bulletin, body manual, you name it. Hyundai and Kia have shown, in this way, support for aftermarket shops like no other company.