The contact owns a 2011 Hyundai Sonata hybrid. On several occasions, while driving 40-50 mph, an audible chime was heard and the check brake warning indicator illuminated. Once the chime stopped, the accelerator and brake pedals were rendered inoperable. The contact stated that the vehicle was turned off and restarted, but the failure recurred. The vehicle was taken to malcolm cunningham Hyundai (4355 stone mountain hwy, lilburn, ga 30047, (770) 972-1222) where it was diagnosed that the wheel speed sensor needed to be replaced. The vehicle was repaired; however, the failure recurred. The manufacturer was notified of the failure. The approximate failure mileage was 123,000.

- Norcross, GA, USA

The contact owns a 2011 Hyundai Sonata hybrid. While driving approximately 1 mph, the brake pedal was depressed and the vehicle accelerated independently. The vehicle struck the tire of a heavy truck, bounced off the tire, and struck a parked vehicle. The contact stated that the brakes were inoperable. Prior to the crash, the vehicle switched from hybrid propulsion to gas propulsion. The air bags did not deploy. A police report was filed. There was no injury sustained. The vehicle was towed to an independent repair facility. The vehicle was not repaired. The vehicle was not taken to be diagnosed. The dealer and manufacturer were not notified of the failure. The failure mileage was unknown.

- Chesapeake, VA, USA

This vehicle Hyundai Sonata hybrid has all the issues that the regular Hyundai sonata recalls have engine was rebuilt due to metal shavings in the oil pan, also this hybrid accelerates at times when it doesnt run on battery (engine kicks in) too many issues with this Hyundai Sonata hybrid!!! in motion on highway/ city streets

- Somerville, NJ, USA

Charging system malfunctioned, sensors melted in valve trane, radiator elbow and fill neck blew off, complete engine failure and battery failure. I have had a problem with the "check brake" light and an alarm going off. However, when I stopped driving and had it towed to the dealership they could find nothing. Prior to this incident, I took a photo of my dash, I had 76,499 miles and the coolant meter did not read hot. I had had the coolant system flushed at 65,000 miles, and I had all oil and fluids checked again after this incident. The breakdown: Three hours into a roadtrip, the A/C began blowing warm, simultaneously - the "the check brake" light and alarm came on, and the "check charging system" light came on. I lost power to accelerate (or brake well) and immediately pulled over and took a photo of my dash warnings (76919 miles). The heat sensor was in the "cool" half, the battery gage showed no power. Battery so low key would not start car. I had the car towed. "tech found that elbow and radiator have holes in them vehicle overheated causing engine to blow." Tiffany richardson said "tech believe vehicle was driven with low coolant level causing vehicle to run hot melting sensors in the valve train and the pipes to fail." The tech is wrong, the coolant system was inspected and flushed at 65,000 miles, and was not due for another inspection. I had had coolant levels checked less than 1000 miles ago, and the heating sensor on dash did not read hot, at the point of breakdown or after a road trip 500 miles ago. Others had the problem at 3000 miles! it's the hpcu. The power for both electric motors is routed through hpcu. The inverters allow the A/C motors to be driven by D/C batteries. This caused the "check charging system" error. This is $15,000 and I owe $4000 on the car - 100,000 warranty has denied it & I am original owner.

- Miami Beach, FL, USA

I have had this 2011 Hyundai Sonata hybrid in the shop since I purchased it in 2011 new the car has serious car hesitation and gas mileage is 19 to 30 per gallon. I have had numerous problems with oil leaks and ended up with a blown motor at 60,000 miles. I also have numerous service issues with the blower ac/ heater not working as well. The car is a lemon after 30 visits to dealership for repeated problems. I have taken car to 4 different dealerships to have a new set of eyes fix the problems and stuck with a rebuilt motor in May 2015. Car is back in the shop for hesitate and ecs problems as of June 2015. Need help.

- Midlothian, IL, USA