Purchased this Sonata Hybrid new in 2011 and overall it really has been a good car with little to no issues. The price of replacing the 12V battery was a bit much but it lasted 6 yrs. I was reading the other two rants on here about transmission failure and I had a similar issue two days ago. Was driving along and the engine started revving and not going anywhere. Had to back off the gas to get the car to engage again. I was about 15 miles from home and barely made it back because it kept doing this.

Got car to the dealership and am keeping my fingers crossed that the 10 yr 100k warranty will cover this. The dealership did say it was definitely the transmission going bad and that they were going back and forth with the warranty dept to cover this. I will update more when I find out.

2011 Hyundai Sonata Hybrid, purchased from dealer as second owner (I suspect the first owner was an expired lease). Car had just under 50K miles when I bought it, and it was lovely for three years (except for the necessary replacement of the air flap mechanism - not happy about that at all. $1000 for a non-essential part?! Really??) Then the issues started that have been mentioned all over about these cars - engine revving with no power, jerking forward without control, stalling out when at lights.

Now, maybe I am old fashioned and used to a better breed of car, but my last car was a Hyundai Santa Fe. It was a WONDERFUL car - when I finally traded it in, it had 275,000 miles on it, and the only reason I traded it was rust to the body (plus it was 10 years old) This 2011 model has been horrific the last three months, and it is still not fixed. I had to have the transmission replaced, or else I wouldn't have been able to drive it. I do not think it is unreasonable to be upset that, at 126,000 miles, a new transmission was needed!

I will add my other issues to other posts, but suffice to say I have had an oil pump replaced, a new battery put in, and the car is still stalling out at lights)

I hope my dealership will assist with some action with Hyundai. I am very disappointed, but more than that, very interested in making sure this lack of manufacturer pride does not continue. Sign me up for the class action!!

I had a oil leak last year and discovered the transmission was bad; this was after I had taken it into the shop three or four times and demanded that they find the oil leak; they repaired the vehicle with a rebuilt transmission. A year later I start having problems again with the transmission and discover that the transmissions is bad again. The car was purchased in 2011 and I have had nothing but problems from day one from electrical, to battery, to transmission. I keep very up the maintenance on the car so I am not pleased at all with the problems I have had and the fun around I get. They want to put in a used rebuilt transmission again and I have no assurance that this rebuilt one is going to be any better than the one that was rebuilt the first time. Also as a new car owner I should not have had transmission problems within less than three years of owning the car.