I was out of my town picking up a toddler I was going to babysit that night, I also had my own 1.5 year old in the vehicle, on my way back home the vehicles check engine light came on, and the car would not accelerate. We were in heavy traffic going roughly 50 mph at the time this occurred. I pulled into the nearest gas station turned the vehicle off then started it back up again and the check engine light was off. I pulled out of the gas station and no more than 5 minutes later as I was making a lane change again around 50 mph the same thing happened and the vehicle quickly decelerated and the car behind me almost hit us! I had to babies in the car under 2 years old! I limped my way to the nearest autozone and the computer read out a misfire in cylinder 5. I lived approximately 15 miles away and had to drive home on the interstate going maybe 40 mph with my caution lights on while heavy traffic flew by at 70 mph! I have had my spouse look at it and we have tried several things and the check engine light will come on intermittently reading the misfire in cylinder 5 every time. We are going to try replacing the spark plugs wires and coil pack, but after a ton of research I have little to no faith this will work. I have only owned the car for 4 days and it has 118900 miles on it. I am now nervous to take this vehicle anywhere outside of town let alone on the interstate that run directly through my town!

- Georgetown, TX, USA

Misfire cylinder #5. this has been an ongoing problem shortly after my mother gave me the vehicle at apx. 24,000 miles. The car was transported from the East coast here to Arizona. It has been in and out of Hyundai dealerships and still no fix, with my father paying the bills, which is hard for him being on a fixed income, but my safety as well as his grand children are paramount. The vehicle will quickly slow down from a 70 mph speed to 35mph without warning and sometimes the engine light will come on (code P0305). I made a complaint once before (case #389816). This continuing problem with no fix has me have several near misses of a rear end collision, which so far I have been lucky not to have. The most recent repair was on June 14th thru 15th, 2013 and the problem was back on the Monday after picking the vehicle on Sunday, the 16th. When the problem first happened the vehicle was still under the extended service agreement and of course it's now expired will the same problem that wasn't researched during that time. I have seen many comments with owners having the same issues on Hyundai's forums, so it's not my imagination. Can someone please investigate these claims so that the problem can be solved? if I could afford a new vehicle it would solve my problem and pass it to someone else, but I don't have the money to do that. Please help, thank you.

- Queen Creek, AZ, USA

The contact owns a 2005 Hyundai Tucson. The contact stated that the vehicle suddenly accelerated independently. The failure recurred intermittently and during cool weather. The vehicle was taken to the dealer several times for the failure. The dealer replaced the clutch and the idle control actuator. The vehicle was repaired. The manufacturer was not made aware of the failure. The failure mileage was 60,000 and the current mileage was 63,000.

- Tucson , AZ, USA

Unexpected acceleration of engine when at complete stop (at stop sign) and foot had been on brake for at least 30 seconds. Shift was in drive, engine went full speed, all wheels spun on ground, creating much smoke. Foot remained on brake. Note that accelerator pedal when not engaged is below level of brake pedal when it is engaged and that when accelerator pedal is full down then its level is 3 inches below the brake pedal level when it is engaged. Right foot was on brake - thus no way for operator error since if foot had been off brake the vehicle would have shot forward into intersection and there would have been a multiple car accident. And there is no way to have right foot on brake and to have accelerator full down at the same time. Shifted to neutral, engine continued to race, some noise when shifted - may have harmed transmission. Turned off ignition switch and engine stopped. Vehicle started normally after this. Ac was on. Car had full dealer service at 45,661 miles and state inspection a week before this incident. At 45755 miles, tech confirmed ses light; found code P0150 oxygen sensor- not replaced, software updated for engine control module. Updated 06/24/11

- Spotsylvania, VA, USA

Problemas con el power train. History = en el primer ao SE dao cd player lo cambiaron pero empece a tener dificultades con el horn por un mal entendido cambiaron el clock, hasta la fecha nunca me arreglaron el horn el cual deja Y empieza a funcionar en cualquier momento. El vehiculo en veces prendia la luz del "check" pero por unas horas O un dia el dealer nunca encontro nada en veces tambien SE daba como jalones como que SE queria parar, SE llego a para 3 veces, los del dealer nunca encontraron nada siempre la lleve ahi para mantenimiento Y cambio de aceite, ellos cobran demasiado por los servicios, ya cambie headlights 2 veces Y otras lucesitas del frente, SE cambio serpentine belt, bateria, llantas, parabrisas, frenos; en los ultimos 9 meses cambie a otro lugar para cambio Y chequeo de fluidos. El 12/17/09 7am, prendio a la 3rd vez que trate fui Y vine al trabajo Y casa sin problemas, por la tarde sali a los 15 minutos SE empezo a jalonear Y cada ves que bajaba la velocidad SE queria apagar el motor lo cual sucedio al hacer algun stop, pero la prendia de nuevo sin ningun problema al regreso a casa volvio a pararse varias veces, ademas SE prendio la luz de "check" Y a los 5 minutos SE prendio otra que por el seor que levanto el vehiculo SE que indicaba problemas en el "power train" Y menciono tambien el 4X4. Total que al prender esa luz ya no quiso levantar la marcha nomas como a 1 milla por hora Y eso jalonendose mucho, bueno por una U otra razon yo hable hasta el 12/29/09 para que la levantaran Y hasta hoy SE me comunico que tenia un sensor daado algo asi como "throtle position censor" por lo cual me quieren cobrar $455 + taxes. Yo no tenia idea de este sitio, Y creo que tenia derecho de que SE me comunicara en el dealer acerca de todos los recalls para este tipo de vehiculo, estoy insatisfecha con el vehiculo Y por los altos costos de mantenimiento que he tenido que pagar de algo que ya sabian que existia. Necesito ayuda urgene, please. Received complaint written in english.

- Chicago, IL, USA

The contact owns a 2005 Hyundai Tucson. When attempting to make turns while driving, the vehicle will stall without warning the dealer has been contacted, but no repairs were made. A representative from the manufacturer stated that they did not have any recalls or warranty for this type of failure, and that they were not sure how to repair the vehicle. The failure mileage was 33,148. Updated 3/8/10 the throttle positon sensor was replaced. Updated 07/09/10

- Prescott, AZ, USA

1/6/09 while driving the tuscon began to feel hesitant with slow acceleration and stalled while I was turning across traffic and malfunction light came on. Tow was required to the dealer where the tps sensor assembly was replaced. Mileage was 50209. I purchased my tuscon new in 9/2005 and since 12/05 I had the car in the dealer for malfunction light six times. On 4/26/2009 while traveling on the NJ turnpike the tuscan began to operate in the same manner as in 1/09, and thankfully, I was able to pull over to the shoulder before the tuscon stalled and caused a major accident. I was towed to a hotel, and the next day towed again to a NJ dealer where the sensor assy-air flow and sensor assy oxygen LH were replaced. Mileage 53401. I drove 150 miles to home, and the malfunction light came on again. I took the car to my regular dealer said the code was found for cylinder # 5 misfire, E ngire not misfiring at this time. I contacted the Hyundai consumer assistance center and reported all of the above to them (three calls were made) I was told I would hear back from them last night, but have not. I travel on high speed/traffic roadways often and now I am concerned for the safety of my passengers, drivers/passengers in other cars and my own. I am I to know if the car is going to stall again, and if I am aware of a change in it's operation how I can feel safe not knowing if I will be able to pull to the shoulder before this happens.

- High Falls, NY, USA

: the contact stated while starting the vehicle, it lurched forward and would not engage into gear. Also while driving, the 4WD light intermittently illuminated. The vehicle was taken to the dealer several times who could not duplicate the problem.

- Contoocook, NH, USA

2005 Hyundai Tucson engine revved up and lurched forward while consumer was trying to park. A recall (05V119000) of the automatic stability control was done and the consumer hoped that this would correct the problem but it didn't. after the recall work was done the vehicle hit a handicapped sign while attempting to park damaging his vehicle and another vehicle.

- Beacon, NY, USA