The contact owns a 2004 Hyundai Elantra. The contact stated that smoke emitted from the engine while driving 30 mph. The vehicle was maneuvered to the shoulder and the contact noticed that oil was leaking from the engine. The vehicle was towed to an independent mechanic and the contact was informed that a crank shaft seal needed to be replaced. The vehicle was repaired, but the failure recurred after driving approximately 100 miles. The vehicle was towed back to the mechanic and the contact was informed that a head gasket was blown. The vehicle was then towed to an authorized dealer and the contact was informed that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure and offered no assistance. The failure mileage was 86,000. The VIN was unavailable.

- Windsor Locks, CT, USA

The contact owns a 2004 Hyundai Elantra. The contact was driving approximately 10 mph when she engaged the accelerator and the vehicle stalled followed by the illumination of the check engine warning light. The vehicle was towed to the dealer but was not repaired. The VIN was unavailable. The failure and current mileage was 81,000.

- Bronx, NY, USA

Sudden acceleration incident I am the son of the car owner. I was driving the car. The incident occurred about 8:30 am on June 17, 2010, in bethesda, md. I was exiting the giant food parking lot and stopped for traffic along old georgetown road. The car stopped but then all of a sudden inched ahead. I pushed down harder on the brake; heard the engine racing; saw the tachometer go past 6000 rpms. I immediately put the transmission in neutral. The engine was still racing. I turned off the car. I started the car and the same thing occurred, the tachometer went past 6000 rpms. I turned off the car. I rolled the car to a parking space. I called my wife. A few minutes past, and I started the car again. This time it operated properly. I took the car to fitzgerald auto mall that evening, for next day service. The technician reported hearing of such incidents when "after market oil filters were used on both Hyundai's and on Subaru's." I recently had an oil change on that car. The gaskets are apparently not the same as on the factory oil filters. So the oil and filter was changed. They also found a mis-fire code in the computer. So the plugs and wires were changed. There was no vacuum leak code in the system.

- Germantown, MD, USA

The contact owns a 2004 Hyundai Elantra. While driving 55 mph, the vehicle shut completely off and would not restart. The contact noticed fluid and debris on the ground near the vehicle. The vehicle was towed to her residence and has not been inspected by a mechanic. The engine size, powertrain, and # of cylinders were unknown. The current and failure mileages were 80,000.

- Santa Maria, CA, USA

Oil filter gasket was stuck to the engine clock. As a result, a leak developed, and oil began to spray all over the vehicle, and the engine seized.

- Spotsylvania, VA, USA

Intermittently while driving at any speed vehicle stalled. Also, consumer had difficulty starting the vehicle. Dealer examined the vehicle ten times and still could not pin point the problem.

- Groton, CT, USA

Crankshaft position sensor...my car has 650 miles and is 2 weeks old. My second crankshaft position sensor malfunctioned this morning. This is a dangerous part to have go as it causes the vehicles engine to suddenly stop, leaving you coasting without power steering to "hopefully" a safe place to wait for the 10-15 minutes it takes before your car will start again. This has happened no less than 10 times between the 2 sensors that I've had go. Each time I brought the car to the dealer within 24 hrs of malfunction. The dealership replaced the first one, but they were out of stock this morning, now I have to drive it for another 24 hrs in an unsafe condition, the loaner vehicles were already in use. A search of the web told me that crankshaft sensors have been a problem for Hyundai for many years. The dealership will replace it again at no charge. Having this happen in a place where there is no breakdown lane could be life threatening.

- Amesbury, MA, USA