Please be advised that I purchased said vehicle new and at around 35000 miles I started to notice that when I slowed down and came to a stop the transmission would jerk on the down shift, which is not normal. On 01-19-2012 I brought my car to the dealer where I purchased from. I was informed that this problem is common and that once my computer is reset it should go away, and there is a service bulletin on that issue. On 03-19-2012 I was having the same issue so the transmission was replaced with factory reconditioned transmission. Now with 74000 mile the car is back for the 5 th time for the same transmission problem. The dealer has my car and I have not heard from the dealer or Hyundai corporation for two weeks. I believe that Hyundai corporation knew the problem existed and neglected to fix the problem other wise a new car with 35000 miles should not have this problem and the mechanics don't know how to remedy the faulty transmission. I am very disappointed with Hyundai and there handling of this problem. I believe the damage has been done, and new software is not going to fix this problem, the bands in the transmission are worn now, the damage has been done. This is just putting a band aid on a serious problem and a manufacturing defect. One does not anticipate any serious problems with a brand new car with only 35000 miles. What good is a 10 year 100.000 mile warranty when you start having these problem at 35000 miles. I have done some research on-line and there are others who have the same problem with same car, I am not the only one.this is a disgrace Hyundai corporation I purchased said vehicle from atlantic Hyundai Inc. Located at 193-205 sunrise highway, West islip NY 11795. I have also contacted Hyundai corporation several times but to no avail.

- Deer Park, NY, USA

I noticed a shuddering at 90,250 miles, while traveling during the winter at around 30-45 mph, but was very intermittent, and would go away. Then on 10/9/2013 at 102,515 miles, from park, the transmission would not engage into reverse or drive. I could hear the transmission shift, but it was not disengaging from park. Per Hyundai service technician, the transmission was "junk" and would need to be replaced. I contacted Hyundai corporate, during which time I was informed they didn't have my information in their system and that in fact there were 2 recalls that they failed to notify me of, and was told that if I allowed the Hyundai service to do the repair right then, that I would be eligible for their policy reimbursement. One of the recalls was an ECM and tcm software update in which symptoms were improper clutching and de-clutching of gears when accelerating and decelerating. That shift quality over time caused undo stress on the gearing causing my failure. The repair was made, I then had to pay upfront, and a week later they've denied my policy reimbursement claim due to fluid being the cause of failure. I then provided them with further documentation showing that their own technician re-used 5 quarts of my original fluid on the repair order, and that I followed the maintenance record that was suggested by their own technicians advice when I purchased the vehicle. Drain and fill every 30,000 miles. The last drain and fill was on June 14, 2013. Hyundai did not provide me with any fluid analysis or specs to support their denial of my policy reimbursement. I saved the agents voicemail of the denial in which she stated due to "color" and that alone, was the reason why the claim was denied.

- Kansasville, WI, USA

I had to replace the rear brake pads and rotors. The rotors were warped from the pads constantly rubbing on them. Clearly there is a problem here with the number of complaints I see. My mechanic could not believe the damage done to the rotors and told me the front brakes usually wear first. I have also had the vehicle in twice for the rough done shifting that occurs when the vehicle is cold. The dealership reprogrammed the transmission both times but that did not solve the problem. I also had a problem with the ESC light staying on but the dealership replaced the rear wheel speed sensor.

- Ashtabula, OH, USA

Erratic shifting. Sometimes lurches forward into a higher gear when coming to a stop, nearly causing me to hit car ahead of me. Also front brake rotors are warped causing rumble. I am an exceptionally conservative driver, mildly accelerates and brakes gradually well ahead of stopping. I had the computer upgrade that was supposed to correct the transmission problem shortly after purchasing car at suresky in goshen, NY. This failed to correct problem and I don't have the time nor want to continually spend my saturdays sitting for hours in the service area waiting room. I have read many similar complaints online and it seems that Hyundai chooses not to address this problem. This is my third and will be the last Hyundai purchase.

- Greenwood Lake, NY, USA

I had an issue with my car jerking rather hard with the auto-tranny downshifted from 2nd to 1st gear whenever I slowed down. This somewhat stopped when the car got warmed up, guessing more specifically when the tranny heated up. I see I'm not the only one. I'm in a warmer climate since and haven't seen it but will see how it behaves this winter in austin, tx versus las cruces, nm. I think it may have stopped about the same time a) it got a little warmer out and B) I simultaneously stopped putting in it neutral at stoplights (trying to save my clutch from wear at the time.) perhaps it used this "neutral" info in its computation for the tranny computer and that was this issue. Or maybe it was the cold and I still will find I have the problem. Or both. Not sure but wanted to put this out there since I'm not the only one but am probably the only with the problem who was putting the car in neutral at lights.

- Austin, TX, USA

The vehicle was aqua planning, the driver lost a complete control over the vehicle. The car was bouncing between road sides, left and right - 3 times. The car hit the gate rails 3 times. None of the air bags came out and the seat belts appeared not to be locked at the moment of accident. As a result the passenger's body moved freely in the car and hit the left rib and internal organs, and hit the right side of the face, including cheek bone and nose. The passenger's face was severely bruised and swollen. Besides, both driver and passenger had a whiplash.

- Louisville, KY, USA

Heard squealing and howling from the rear driver side. Took to dealership and was told that the brakes hung up and I needed to replace brakes and rotor ($189). I was told that this is a maintenance issue and nothing was covered under warranty. I purchased the items and when they were going to be replaced we discovered the dust boot was pulled out of the caliper (which would have been covered under warranty) I contacted the dealer and was told that every 7000 miles the calipers would need rebuilt. I've been driving and grew up around garages and never heard of such a thing!

- Shippensburg, PA, USA

While slowing at around 25-30 mph the car would "jerk" forcefully like a sudden stop. This happened every day. It would improve as it warmed up. I took it to the dealership and was given excuses (they told me that the transmission needed flushed-at my expense, my driving habits, etc). Finally after several trips to the service department, they admitted the issue. The transmission was eventually replaced after they "reset" and flushed the original transmission. It seemed to get better. I still feel the "jerk" in the downshift, but it is not as bad as it was. I mentioned this to the dealership and they told me that it was going to cost $100 just for them to "look at it" even though it is still under warranty.

- Grand Bay, AL, USA

The contact owns a 2009 Hyundai Sonata. The contact stated that the vehicle would jerk when shifting gears. The contact took the vehicle to the dealer and was told that the transmission needed to be reprogrammed. The vehicle was not repaired because the transmission was no longer under warranty. The failure mileage was 55,000 and the current mileage was 73,000.

- Rythem, GA, USA

Noticed the car does not pull up the steep hill very well. Took to dealer who said transmission oil is dirty and smells bad and it needs transmission flush, resetting of transmission shift points, and fuel system clean. I pointed out these are not per scheduled maintenance requirement and was concerned the car was causing these problems so early in its usage. Will take it for the transmission flush as that is what dealer insists on before they inform me if there is a safety issue present.

- Saint Louis, MO, USA

While driving my wife's 2009 Sonata the clutch became stuck to the floor. I had to use my foot to pull the clutch back up to the normal operating height in order to change gears. I was almost rear ended as the person behind me expected acceleration at the time but I was slowing down due to the inability to switch gears in a timely manner. This has happened at least a dozen times. The transmission also does not function properly during this problem and is at times nearly impossible to get into gear requiring me to depress the clutch several times before it goes into gear properly. Had it to the dealership and they could not duplicate the problem therefore they claim nothing is wrong. They lubricated the linkage and said that was all they could do. I have discussed this with reputable shops in the area and they claim it is certainly a problem with the drive train, but Hyundai will not fix this. This is definitely a safety hazard my wife Transport both of my children daily in this vehicle.

- Brooklyn, CT, USA

The contact owns a 2009 Hyundai Sonata. The contact stated that while driving 25 mph she engaged the clutch to change gears however the clutch became stuck and she was unable to complete the maneuver. She proceeded to pump the clutch several times as it began to operate. The vehicle was taken to the dealer for diagnosis however, they could find nothing wrong with the vehicle. A week later the failure recurred intermittently. The vehicle was taken to the dealer again however, they were still unable to replicate the failure. The manufacturer was notified but offered no assistance. The vehicle had not been repaired. The failure mileage was 30,000 and the current mileage was 45,000. The VIN was not available.

- Silver Spring, MD, USA

Clutch pedal sticks to floor. Very scary. It has happened 6 times. And have taken to dealer. They say all is fine. I could not stop my car. I was lucky there was not anyone in front of me when it happened. My car is a 5 speed mal. I see others with the same problem.

- Byron, MI, USA

Several instances of clutch dropping to floor (usually in high speed urban traffic) making shifting impossible, and leading to pulling on to shoulder and rolling until engine kills at low speed. Have reported to Hyundai, and taken to dealer...they say without duplicating the problem, they can't fix. This has now happened about a half dozen times between 10,000 and 44,000 miles. It is dangerous.. I am trying to document with Hyundai as much as possible, as they apparently are not interested until someone gets hurt or worse..

- Galena, IL, USA

The contact owns a 2009 Hyundai Sonata. While driving 3 mph the wheels locked and/or the transmission locked causing the vehicle to steer to the right and crash into the side of another vehicle. The air bags did not deploy. The driver side and front fender were damaged. There were no injuries. The police was notified but no report was filed. The vehicle was undriveable and was towed to the dealer. The insurance company was notified of the failure. The manufacturer was notified and was sending a representative to the dealership to inspect the vehicle. The VIN was unknown. The failure mileage was 30,000.

- Dublin, OH, USA

Throttle stuck wide open when passing a short line of cars, resulting in excessive speeds of over 80 mph before the ignition was shut off and turned back on resulting in normality.

- Milton, NH, USA