While traveling on I-65 I accidentally engaged the drivers rear window switch and the window rolled down about half way. All of a sudden a loud whomp, whomp, noise started and the whole car shook and the steering wheel started to vibrate excessively. I really thought the car was about to come apart at 65 mph. It took only a few seconds to realize what had happened, upon rolling the window up stability returned instantly. To test if what had happened was real I purposely let down the rear passenger side window down and the extremely loud noise and instability immediately returned and just as quickly disappeared when I let up the rear window. The A/C was on, whether or not that effected the problem, I don't know. The whole episode scarred me and my wife so bad we are now looking for another car. I am not exaggerating this incident. The whole rear end of the car seemed as if it was being hit from each side independently causing the rear end to shift about a foot from left to right. I will not be keeping this car.

- Seale, AL, USA

On May 30, 2016 at around 9 pm I stopped my 2015 Hyundai Sonata at a traffic light and without warning the engine died. I was almost rear ended when the light changed to green. No warning lights came on until the engine died. After about two minutes I was able to restart the car. I turned left at the intersection where my car had stalled and in the middle of the intersection the engine died again. I thought I was going to die. Exited the car and waved traffic by. Two more minutes and the engine started again and I was able to drive the three remaining blocks to my home. I had the car towed to ourisman Hyundai where I bought it. They have had it ever since. Today, June 6, ourisman called and said they could not duplicate the problem and I should return the loaner car and pick up my Sonata. I will not pick up a Sonata that dies in the middle of driving. I would like to live. I called Hyundai America and reported the issue and they open D a case file. I have left messages with the GM at ourisman and he has not returned my calls. Oh, I forgot to mention that when I bought the car (it was a year old) I told the salesman that I did not want a hertz, avis or any other rental car. He assured me it was not purchased from a car rental company. After over 5 hours at the dealership, I was told it had been from a rental company. I was worn out and thought it still had four years left on the warranty. I feel like a fool. I have asked Hyundai America to buy my car back.

- Columbia, MD, USA

My dashboard monitor says repair on off and then I see a wrench. This signal/warning stays on whether I am stationary or in motion. What does this mean?

- Boynton Beach, FL, USA

I was parking my 2015 Hyundai Sonata turbo sport in a strip mall parking lot. I pulled into the space and, before getting in all the way, the car suddenly accelerated to a high speed, jumped the concrete curb and slammed into a concrete wall. The air bag did not deploy and my chest hit the steering wheel and my head whipped back so I now have headaches, neck and back pain.the front bumper was damaged with marks from the concrete and though it remained on the car, it was dislodged. There was also some damage around the front headlights and the rubber part of the undercarriage.

- Chevy Chase, MD, USA

I was admitted into the hospital, where I had surgery and was told I had a hemorrhagic stroke. October 2015, I had 2 more strokes and surgeries. I never had a history of strokes, and was wondering could this be a part of an environmental issue with the chemical exposure from the new vehicle? any useful information would be greatly appreciate.

- Decatur, GA, USA

On 3 separate occassons the vehicle was on a major street when it just died.the first time was comng out of a stop at a red light, the second just when I was driving and the third time whle I was deaccelarating. Miraculalously I was able to use the last bit of momentum and pull over. The car started up again each tme. The dealer had no suggestions the first 2 times except for possble computer misfire.they released the car staitng it should be fine and they could not replcate the event.after starting a case with Hyundai they decided to replace the ignition coils and then the fuel pump. After much questioningand little cooperaion from Hyundai or the dealer, I was told that 1500 people reprted the same life threatenening event onn thier car. Not enough for a recall!!!someone is going to get killed. Neither the dealer or Hyundai thinks this is an issue.case number 8479377.I have never received a call from the case engineer from Hyundai explaining any repairs as promised. Hyundai is unresponsive. The service manager is mike dsantis md isalnd Hyundai centeeach NY631 580 0800

- Kings Park, NY, USA

I am writing in regards to my new 2015 Hyundai Sonata eco that I purchased in May 2015 from mccarthy Hyundai automotive in olathe, Kansas. Shortly after bringing it home, I noticed that each time the car was started on a cold start, it would hesitate and pause upon acceleration when I would take off. After the car warmed up, it was much better but still would pause and hesitate sometimes when I was needing to accelerate quickly. I took the car 4 separate times to mccarthy Hyundai service dept. In olathe. Each time, they would only say that the car is 'operating as designed' and that this is one of the characteristics of the new eco's since they have the dual clutch transmission. We drove 4 other eco's and experienced the same problem. However, they did admit that it seemed abnormal and possibly a patch/update will come out in the future to correct the problem. Unfortunately, this could take many years or not at all. There is no way of knowing. One of the times that the car was at their service center, they did find a faulty fuel pump and replaced it. This alone did not take care of the issue that I am experiencing with the car. My main concern at this point is the safety issue. I do not know when the car will or won't hesitate and pause upon acceleration. I live in a metropolitan area and drive in a lot of traffic. There are many times that I need to be able to merge into traffic and many other reasons when I must depend on my car accelerating like a normal car does. It does not. If there is any way that you can help or look into this issue with the 2015 Hyundai Sonata eco's, I would greatly appreciate it. It could save lives.

- Olathe, KS, USA

I bought this new car a few months ago. At 1089 miles engine overheated while in traffic. I manage to stop safely and I called roadside to tow the car to service. Second day they told me that they need to replace the engine according to Hyundai tech line. This for me was a red flag that something is really wrong with that car. They found coolant inside the engine and this was their diagnosis, jsut like this. The replaced the engine with a remanufactured one and few weeks later I ended up in service again for coolant leaks. They replaced 2 big houses. Not long after this I ended up again in service cause coolant level is low on the overfill compartment. They said is nothing wrong and all the tests are good. So I took the car and a couple of weeks later the same. They told me the same story. Well the car overheated again and again and again till everything started to smell like something melted and some kind of smoke came out from inside the engine when you open the oil cap. The car has been in service for more than 3 weeks with no resolution so far. I reported coolant issues from the beginning but Hyundai refuse to listed and kept saying is nothing wrong. I consider this S huge issues and can cause the car to get on fire or engine to explode. I hope to get this done under lemon law but Hyundai is stubborn and we might end up in court. In the mean time I am paying for the 7 months for a defective problem not to mention the value after all these major issues.

- San Antonio, TX, USA