The contact owns a 2004 Hyundai Elantra. While driving various speeds, the throttle positioning sensor failed on more than one occasion. Upon deceleration, the vehicle accelerated without warning. The contact depressed the brake pedal and the vehicle accelerated rapidly. In addition, the contact described the brake pedal as having a "dead spot", thus the vehicle accelerated on its own after the brake pedal was depressed. On one occasion, there was an increase in the rmps that was directly related to the worn position sensor. The contact independently replaced the positioning sensor. Millennium Hyundai (265 North franklin St, hempstead, NY 11550) was made aware of the failure and acknowledged the failures. The vehicle was not diagnosed. The manufacturer was made aware of the failures. The failure mileage was 105,000.

- West Hempstead, NY, USA

I was driving with my cruise control on and a car stopped in front of me. I hit the brakes and my car accelerated. This is the third time this has happened. Fortunately, I was able to slam on the brakes and the car stopped. Also the air bag light does not go off with an adult in the front seat. This is very concerning.

- Hartfield, VA, USA

The contact owns a 2004 Hyundai Elantra. While the vehicle was slowly reversing with her foot on the brake pedal, the rpms suddenly increased and the vehicle accelerated in reverse. The contact had to depress the brake pedal harder to prevent further acceleration. The failure was intermittent and becoming progressively worse. The vehicle had not been inspected or repaired. Also, the contact stated that the vehicle stalled but when she turned it off and restarted it, the problem corrected itself. The failure mileage was approximately 50,000 and the current mileage was approximately 54,000.

- Omaha, NE, USA

My vehicle revs on it's own. Starting and stopping through town is very dangerous because it is difficult to stop the vehicle. As I hold the brake down the car continues to accelerate as if my foot is on the accelerator. The car revs in park, neutral, drive, and reverse. I took it to a local mechanic. He cleaned out the fuel throttle and the problem went away for about 1 week and came back. I talked to another mechanic and he had never heard anything like it. He told me it was probably a defect.

- Greensburg, IN, USA

Vehicle acceleration.

- Greensburg, IN, USA

2004 Hyundai Elantra, vehicle accelerated without the gas pedal being touched, consumer first tried the brakes which did not stop the vehicle from accelerating. The consumer had to ride the brakes until she could get the vehicle off the freeway, she put the vehicle in a variety of positions, for example drive, park, and neutral the engine still raced, consumer even turned vehicle off and back on and the vehicle would not stop racing, consumer applied both feet to the brake and turned vehicle off two or three times before the vehicle finally stopped, the vehicle had to be towed home, the dealer fixed the vehicle the first time, and replaced the throttle sensor, this occurred on Nov. 18, 2004; this same problem occurred again on June 2, 2005, the dealer states that by replacing the engine check modular that it should fix the problem, and the dealer replaced the engine check modular, consumer is concerned about the safety of the vehicle, the vehicle smelled of a burning smell after the second time. Updated 12/27/2005.

- Jackson, MO, USA

While applying the brakes pedal went to the floor. Vehicle continued to accelerate and rolled back when on the flat surface. Consumertook vehicle to dealer for inspection.

- Sacramento, CA, USA