Before getting deployed to afghanistan, I took my Sonata to a Hyundai dealership to have some repair work done so I could let a friend borrow my car while deployed. Much of the suspension had rusted out and needed to be replaced. I also had to get a new set of tires, despite the fact that the tires I had weren't much more than one year old. In any case, I'm writing this to you after reading an article about an NHTSA investigation into Hyundai Sonatas (2006-2008) for having similar problems. Fortunately, I replaced the parts before an accident occurred but wanted to let you know about the issue in case it helps the investigation. Unfortunately, I cannot provide you with detailed information because all of my paperwork is in storage while I'm in afghanistan.

- Olmsted Falls, OH, USA

At a low speed I lost control of my 2006 Sonata. The rear upper control arm broke free from the K frame and the drivers side wheel shifted out about 3 inches. The stability control activated and steering became very difficult. When inspected by the local garage they found the K frame had disintegrated from rust. I did make Hyundai Consumer Affairs aware of the issue on October 3, 2012.

- Binghamton, NY, USA

Driving on highway from a family event doing 65 miles an hour. Experienced extreme instability. ESC light came on dashboard making us think problem was electronic. Continuing at a reduced speed, the car continued to dart to left. On a highway off ramp, the car darted toward the left hand guardrail, with rear tire squealing. We were still 50 miles from home. Limped the car home to bring to our mechanic. We took it to Firestone in ct. The mechanic put it on the lift and inspected it. Found it to have extensive corrosion on the subframe in the back end. We could of been killed. He told me not to drive the car until the problem was fixed.

- Portland, CT, USA

Rear sub frame rusted through and broke off where it conncects to wheel. Updated 12/27/12 updated 12/31/2012

- Jefferson Twp, PA, USA

The contact owns a 2006 Hyundai Sonata. The contact stated that the vehicle rear end swerved while driving but the contact thought that the failure occurred due to low tire pressure until the electronic stability control light illuminated. The vehicle was taken to a local mechanic where a diagnostic test was performed. The failure was located on the rear left and right wheel where the frame was corroded and cracked causing the rear tires to wear prematurely. The vehicle was repaired. The left and right frame, radius arm, lower control arm, and tires were replaced. The approximate failure and current mileage was 159,801. Updated 01/15/13 updated 1/24/2013

- Jeannette , PA, USA

This problem was discovered Oct 26, 2012. My son noted some loss of control after hitting a road bump. I inspected the car and noted that the rear diver-side wheel was at a weird angle. The car was moved to my local repair shop on Nov 1st. They informed me that there was subframe corrosion effecting the rear control arm and making the car unsafe to drive. He advised me to have my Hyundai dealership look at it. I called garvey Hyundai, of queensbury, NY, where I purchased this vehicle. I spoke to the service manager and arranged to have the vehicle towed from my shop to garvey. He informs me that there has not been any prior problems with subframe corrosion and this model year and no recalls. He tells me that it will cost between $1350 and $2400 to repair and although Hyundai is not responsible they offered me $500 toward the repair work. I feel that this should not be an issue with a vehicle that is only a 2006 and that the repair should be covered in full by Hyundai. The car has spent winters in a garage when not driven. I have had multi issues with this vehicle, including needing to have the engine replaced (while still under warranty) I see that there has been subframe corrosion issues with prior years.

- Clifton Park, NY, USA

I was just getting off the interstate and was driving home when the car made this clunking noise and then I lost control of the steering. I could no longer drive the car. After I got the car home, it was looked at and I was told the control arm rotten off the sub-frame from the inside out. I did some research and found that this was a problem with the 2001-2004 Hyundai Sonatas. I contacted Hyundai and they did not seem to want to help me and told me this has not been a problem in the past. It apperas to me that if they recalled previous models that they have not fixed the problem. I am very thankful that the control arm did not brake while I was on the interstate driving at 65 mph.

- Roxbury, VT, USA

The contact owns a 2006 Hyundai Sonata. The contact stated that the front sub-frame was corroded. The contact was driving 65 mph when the rear stabilizers separated from the vehicle. The vehicle was not been inspected or repaired. The failure and the current mileages were 176,000. Updated 03/16/12 the consumer stated the vehicle was not repaired, because the frame wasn't broken. Updated 05/11/12 the consumer stted the vehicle was repaired. The subframe was replaced free of charge by Hyundai. Updated 12/21/2012

- Pulaski, NY, USA

The contact owns a 2006 Hyundai Sonata. The contact stated that while driving, she could hear a loud sound coming from under the front passenger side wheel. The vehicle was taken to the dealer who diagnosed that the rotors were defective and needed to be replaced. The remedy failed to repair the failure. The vehicle was taken back to a dealer who diagnosed that the control arm bushings were defective and needed to be replaced. The manufacturer was made of the failure who did not offer any assistance since the vehicle was not included in any recalls. The vehicle was repaired. The failure mileage was 10,000 and the current mileage was 129,000. Updated 06/07/12

- Pasadena, CA, USA

Broken left upper control arm not covered under 100,000 mile warranty, which could have adversely caused a loss of control of vehicle, per mechanic.

- Moreno Valley, CA, USA

The contact owns a 2006 Hyundai Sonata which houses pirelli cinturato P3000 tires, line size P215/60/R16. While driving, he would hear an echoing howl from the front driver's side tire. The vehicle was taken to a tire specialist where rotation and balance was performed on the vehicle. He continued to hear the noise from the tire after it was rotated and took the vehicle back to the tire specialist. The tire specialist advised him that there may have been an issue with the shock absorber on his vehicle. The vehicle was then taken to the dealer where they could not duplicate or diagnose the failure. They advised him that the tire may have been out-of-round and/or failing from the inside of the tire. The contact replaced the driver and passenger side front tires, which stopped the noise on the front driver's side of the vehicle. The failure mileage of the tire was 26,000 and the mileage on the vehicle at the time of the failure was 78,000. Updated 4/26/10 updated 05/06/10

- Albuquerque, NM, USA

After owning the car and driving it for less than 100 miles, there was a noticeable vibration on the around 60-75 mph. The tires were re-balanced and the condition remains. The vehicle was taken to another dealer and re-balanced and the problem continues. When I returned again to the purchasing dealer for this problem for a third time, I was provided a loaner vehicle (gls V-6) and it has the same problem, but more evident. When I received my vehicle, the problem remains.

- Irving, TX, USA