The contact owns a 2010 Hyundai Elantra. The contact stated that while driving at 30 mph, the vehicle experienced unintended acceleration. The failure occurred without warning. The vehicle could not be stopped even when the brake pedal was depressed. The vehicle was able to be stopped and parked when the emergency brake was applied. The vehicle was restarted and operated as normal. The failure had occurred on several occasions. The vehicle was taken to the dealer where it was not diagnosed. The manufacturer was not notified of the failure. The vehicle failure mileage was approximately 42,000.

- Montgomery, NY, USA

My wife owns a 2010 Hyundai Elantra and the complaint I've got is about the lug nuts. I had to replace the rear brake pads, brake shoes and rotors. The first problem I ran into on this project was that the lug nuts were so rusted that the lug wrench supplied with the car wouldn't fit over them - the chrome plating on the nuts had deteriorated allowing rust to built up underneath the plating so that the wrench wouldn't fit. (I thought of those individuals who had to change flat tires on the road and wouldn't be able to get the flat tires off.) I called the dealer to see if new lug nuts were covered under warranty but they said no, that they'd give me a 'deal' of $10/nut - around $200 to replace all them on the car! I still have the rusted lug nuts on the car but carry an additional wrench that will fit over them. I did manage to replace all the parts, including rusted and warped rotors mentioned in some of the other complaints I've seen but caution anyone who plans to tackle this job to be prepared for a grueling job.

- Marion, NY, USA

The brake booster vacuum check valve suddenly failed while driving resulting in vastly reduced braking power and near inability to stop the vehicle. I was lucky to have been able to let the car slow naturally and turn onto a side road. If I had been approaching an intersection I could have easily been injured or killed. When inspected the vacuum line was completely disconnected from the valve resulting in no power from the brake booster. This part of the vehicle had never been serviced.

- Warrenton , VA, USA

At 36,000 miles I needed all new brakes and rotors and the 2 front tires were completely worn to extreme unsafe condition. Spent over $680 to repair it all.

- New Bedford, MA, USA

The contact owns a 2010 Hyundai Elantra. The contact stated that while driving 15 mph, he attempted to engage the brakes but the vehicle did not respond. The vehicle was taken to the dealer where the technician stated that the vehicle was performing to standards. The manufacturer was made aware of the failure. The vehicle was not repaired. The failure mileage was 48,000 and the current mileage was 54,000.

- Blue Island, IL, USA

The car revving when the cruise control is on and pushing on the breaks then not being able to put the car in reverse or park. I had to use the shift lock release to just be able to get it into park after that.

- Noble, OK, USA

I took my vehicle to Firestone auto for an oil change and inspection. The technician found that when he applied the brakes they pulsated. Upon further investigation he found that all of the brake rotors are rusted and pitted. The rear rotors are worst than the front. He also noted that the rear brake shoes are worn out and need replaced. Normally the front pads are replaced twice to once in the rear. My guess is that the rotors caused the rear pads to wear out prematurely. I contacted Hyundai and they said that the rotors are warranted for 5 years / 60,000 miles but only manufactured defects are covered. They said that rusting and pitting from weather conditions is not covered. Should I have kept them oiled so they didn't rust? I have a 2006 Kia with over 113,000 miles on it and the rotors are still perfect with no rust or corrosion. Both vehicles have been exposed to the same driving and weather conditions. Had I not paint for the vehicle inspection and been told that the rotors and brake pads were bad. I could have been subjected to brake failure or possibly one of them hanging up and causing a spin out condition.

- Petersburg, OH, USA