I have an 06 Sonata with the 6 cylinder. I have had one emission issue with the car at 70k miles (I had to pay for the repair). I purchased my first set of tires at 68 k miles and I just had the brakes inspected @ 74 k and front and rear are at 75% new. Besides the normal maintenance (bulbs, wiper blades), Ive had to repair under warranty the w/s wiper pump, and a couple of check engines until I had the gas cap thing down. I love this car, so I bought my fifth Hyundai and second Sonata today. The 06 car handles well, has great pick up and gives even more with the shift- tronic. Plenty of drivers leg room with easy cabin controls. Great braking and the ESC and multiple air bags a plus.
Leather seating, steering wheel controls, ESC, multiple air bags, pick up and handling.
Front seat base needs to be longer and the lower power seating w/ more of a tilt adjust to compensate for the short base. Engine whine- horrible. Headrest is a pain when backing.