Second owner - I purchased this 2013 Hyundai Sonata Hybrid LX from the dealer as a certified used vehicle and it had 28K miles on it. Original owner in the same town. I haven't had any major issues with the car and have been generally happy with it until now. Just turned over from 92K to 93K miles. Note: I have had every recall notice (and there were quite a lot!) taken care of and received notice that my warranty would be increased to 150K miles.

I was fortunately close to home putting up lost pet flyers on a Saturday when I noticed after coming to a complete stop, then giving it gas to go to the next intersection, the engine would rev with high RPMs but wouldn't engage. I would put it in neutral, stop again, give it gas etc. until I limped it home a half mile and parked it. I looked up the symptoms and realized the transmission was slipping but with a closed transmission I couldn't check the fluid level. I decided trying to drive it anywhere, even the shop, would be damaging so I made an appointment on line and arranged for a tow.

It was several days before they could look at it and when they did, it stumped the repair guy who finally had to reach out to tech support at Hyundai to figure it out because there were no codes when they tried to pull codes.

Finally my response and quote: full transmission failure - cost of repair $7930 (so high the system here didn't let me put it in!) I was shocked and told the advisor that I would expect it to be covered under warranty and was told it wasn't because I was not the original owner. I refused that answer and said it was a used car CERTIFIED by the dealer (was also the original dealer) and if the car is expected to last 100K miles, it should not matter whether I was first or 10th. He gave me the number to consumer affairs.

The lady at consumer affairs was very thorough - asked lots of questions about when the problem occurred, etc. and I shared my same sentiment, that I felt it should be covered under warranty. I am supposed to hear back from them in 2-3 days. I guess they mean business days since it's been that long.

I checked here and assorted car sites and apparently other owners have experienced transmission failure but I was lucky it was before 100K miles so I might have a leg to stand on.

My Honda accord ran for 150K miles with no trouble. Not impressed with Hyundai. I'll update this site on the warranty claim in case others need encouragement!

I had sent a message about 6 months earlier to the dealership closest to me. I explained that the car was shifting on its own very hard when I pulled up to a stop sign. I sent message on website this particular occasion because it shook the car and it died. It only did weird stuff about 3 times after that until the day it completely went out. They did not give me an option of seeing if it were something like a valve or relay. They just said it had to be replaced. Then they told me that it was not under warranty.

I tried to explain about the message I had sent months before. And, they just said they had not record of it. I paid for the repair myself. They said my warranty ended at 60 K miles because I bought the car from the Federal Gov't. So, I was 2nd owner. And that dropped the warranty from 100K to 60 K. I wrote a complaint to Hyundai about a week later. I did not hear anything and when I called to find out about a response. The dealership said they had no record of a complaint. SO, that was the 2nd time I filed with them just disappeared. If I ever go through anything like that again. I will mail certified letters. I don't know what else I could do.

This is the 2nd major problem. This was a catastrophic failure of my car. I had just exited the freeway and was in a hilly region. My speed was approximately 25-30mph. I was driving uphill and suddenly my car's bells and warnings sounds went off. I had never experienced this before. Loud warning beeps, some kind of Hybrid failure blinking lights on my display. The vehicle stopped moving forward and would not move. The entire electrical system seemed to go haywire. Some people helped me push it to the side of the road. Unlocking the car with the remote did not work. I could not move the gear shift into neutral from park so the wheels locked and the tow truck had great difficulted pulling the car onto the bed.

My car was in the shop for 6 weeks. I was 3 DAYS away from my warranty ending. They replaced the entire transmission. The cost was $5000 but I did not have to pay for it since I was still in the warranty. If it had happened 4 days later, I would have been bad. Thankfully, it was covered and they covered my rental car for the 6 weeks while it was in the Hyundai shop being repaired, so no complaints there.

But honestly if this had happened 10 minutes earlier on the freeway at 70mph, I have no doubt there would have been a bad collision. Complete engine failures with loud bells and warning lights is terrifying when it occurs. Knock on wood, I'm at 80,000 miles and have not had any other problems. Hoping the new transmission will get another 80,000-100,000 miles.