Under normal driving conditions, the car jolted and something didn't feel right on the right front side of the car. I was able to pull the car off of a 4 lane highway and into a parking lot. I discovered motor oil all over the inside of the engine bay and in the right wheel well. Upon inspection by two different mechanical shops and my insurance company, a hole was found in the engine. The vehicle has 90,017 miles on it. It has been indicated this is a manufacturing defect that would lead to engine failure and a hole in the engine. Hyundai is claiming that this is not covered under the theta II engine recall and have been extremely slow to assist. I am the second owner of this vehicle. I purchased the vehicle in June of 2017 with approximately 39,500 miles on it. I have changed oil with synthetic oil every 7500 miles which is the manufacturer's recommendation. There was no warning, no warning lights illuminated, etc. Prior to the engine failure.

- Greene, IA, USA

During normal driving on the highway (65 to 70 mph), the check engine light started flashing and the car lost power. I was very startled and I immediately exited and headed to my Hyundai dealership. The car had almost no power and was bucking hard. The engine had a loud knocking sound that grew in intensity as the engine speed increased. I drove gently to the dealership. This could have easily been a dangerous accident involving other vehicles as I was startled and lost power at the same time in moderate to heavy traffic and had to make a sudden exit from the roadway to avoid many more miles of travel to get to help.

- Riverview, FL, USA

My college age daughter was driving the car when it started knocking. Then a warning came up that said to park the car immediately, hybrid system failure. After having her car towed, it turns out the engine seized and needs to be replaced. It's a 2.4 liter engine very similar to the recall currently going on with the theta II engines.

- Siler City, NC, USA

I was driving down the highway going about 60 mph and all the sudden it's like the car shuts off, slowing to about 45. As I push on gas it does nothing then about 3 seconds later jerks back up and then repeats. It does this now everytime I am traveling. Besides giving me whiplash, it is dangerous because it could definitely cause a crash. My brake lights have been replaced 5 times in two years. Also there is always a loud clicking noise when driving. It sounds awful.

- Defuniak Springs, FL, USA

Was changing lanes and tried to pick up speed. At which point my engine locked up and no longer turn over. This caused my power steering to fail, brakes to be applied despite me not pressing them. Then my car began to smell like it was burning. I was going 50 on a highway when this accrued during rush hour.

- Mckinney, TX, USA

My car does not accelerate properly. If the gas pedal is pressed after stopping it jerks very hard before going into gear. Also, my mileage for gas is broken. The electric meter will go up and down on its own and does not read properly. No matter if the car is in motion or stationary, the gas meter will jump up or down.

- Woodbridge, NJ, USA

The contact owns a 2012 Hyundai Sonata. The contact stated that the engine failed without warning while driving 45 mph. The vehicle was towed to an independent mechanic. The contact also stated that the vehicle was included in NHTSA campaign number: 18V934000 (engine). Autonation Hyundai mall of Georgia (3445 buford drive, buford, Georgia 30519, (770) 674-6079) inspected the vehicle and stated that the engine did not need the recall repair. The contact stated that the VIN was included in NHTSA campaign number: 18V137000 (air bag, seat belts), but was not repaired. The air bag warning indicator was not illuminated. The manufacturer was contacted. The engine was not repaired. The approximate failure mileage was 48,000.

- Sugar Hill, GA, USA

I was driving on a highway and my car simply stopped accelerating and began to shut off. How does a car just die in the middle of driving?! this is a serious safety hazard that needs to be addressed. I barely made it over to the side of the road to get out of the way of traffic. Nearly got hit by a car!! I was absolutely terrified that I was going to get hit because I was unable to move my car. Unknown reasoning for failure, but I believe this to be an engine malfunction or issue with the alternator. I am now aware of a recall on that indicates engine failure would result in vehicle stall, increasing the risk of crash!!!! unbelievable. Please address this problem so that no one else has to experience something as terrifying as this! recall number: 15V568000.

- Palm Beach Gardens, FL, USA

The contact owns a 2012 Hyundai Sonata. While driving 50 mph, the contact heard a knocking sound coming from the engine. The contact drove in neutral to an independent mechanic. The mechanic diagnosed that the engine failed and a cost estimate was provided for the repair. The manufacturer and dealer were not notified of the failure. The vehicle was not repaired. The failure mileage was 120,614.

- El Paso, TX, USA

Metal in the oil and making a noise. It stalled not once but twice while driving on a highway. Had to pull over then put in park and restart. Just had oil changed and it was 1000 under needing it done again. Have no idea why metal shavings would be in the oil. Pretty sure something happened with the rods now.

- Weatherford, TX, USA

Vehicle stalls/dies while driving. It stalled 2 times but when I pulled over, it would start right away. While trying to make it home, it stalled for a third time and while pulling over it started smoking so bad I thought the vehicle was going to catch on fire. Vehicle had to be towed. There is an engine recall for this vehicle but dealer is giving me the runaround. Very disappointed with how Hyundai has handled the incident that almost caused an accident that could off been deadly.

- Mascotte, FL, USA

When driving in huntsville, al on city streets and the highway when I'm turning my steering wheel it makes a clicking noise and the column appears loose. The brakes are sticking and requires me to push down hard to stop my vehicle. I have replaced the front lights and back ends lights numerous times and they continue to go out frequently. I purchased new tires in June 2019 from bentley Hyundai in huntsville, al and while driving the tire tube popped and deflated. There were no nails in the tire. There was a hole in the tube. I almost crashed.

- Huntsville, AL, USA

Our 2012 Sonata is now on its 3rd engine (1 original and 2 add'L). These were subject to recall. Went for my routine oil change and my mechanic pointed out that there were metal shavings in old oil and on drain plug. Are we looking at another new engine to be installed. Bought it new as a commuter car because of the warranty, but it has spent more time in shop than me driving it.

- Columbia, NJ, USA

Vehicle was being driven on the highway and without warning or any collision caught on fire.

- San Diego, CA, USA

The contact owned a 2012 Hyundai Sonata. The contact stated that while driving at 55 mph and entering the freeway ramp, the vehicle seized with all warning lights illuminated. The contact noticed smoke coming from underneath his hood. No flames were noticed. The vehicle was towed by aaa to an independent mechanic where it was diagnosed with vapor lock. The vehicle was not repaired but was then towed to the dealer inver grove Hyundai (1290 50th St E, inver grove heights, mn 55077 (888) 706-5928) but no diagnostic test was performed. The failure recurred. The manufacturer was made aware of the failure and informed the contact that an investigation would take place. The failure mileage was approximately 150,000.

- E Saint Paul, MN, USA

My 2012 hybrid Sonata, 104,000 miles, suddenly started jerking and nearly stalling one recent morning on a drive from home on a divided road. It barely moved forward, badly jerking, message on the screen was : hybrid battery low. Pull up safely an place the car in park". so after 1/2 mile, I returned home. Because of low speed on a divided road, there was a serious concern of being hit by another car. I had the car towed next morning to the Hyundai dealer. They reported 'nothing wrong found' and returned the car which is running fine, though jerking transmission at low speed. I am wondering if this happened away from home, what shall I do. I need assurance that that will not happen again. How do we get that assurance ?

- Berwyn, PA, USA

I'm not sure if this is an engine problem. When I would take off in my car, I accelerate and after I started going, I could push the pedal all the way to the floor and it had no power, it would almost completely stall in the road. I let off gas and push again and it would regain power and drive. No check engine light came on, no low oil, no service lights at all. All of the gauges in the dash red great and everything was normal. I started my car one day and it started making this chirping noise, almost like a bird chirping when I accelerate, but once I got up in speed the chirping stopped. I then started my car and there was a clicking, ticking type noise that got worse after 2 days. I took the car to a shop and was told it needed a new engine. Again, all gauges are completely normal, no check engine light at all to warn me there might be a problem with my car and now it cant be driven. I purchased this vehicle new. Why doesnt the check engine light or gauges work to warn of possible issues, this has to he a defect and what is the chirping, stalling, loss of power" if my engine was going bad, why did the system fail to alert me"

- Marshall, NC, USA

I have now had two major issues with my hybrid. The first was 5 months ago. My husband was driving the car on the interstate, when all of the sudden he lost power and the engen started smoking and make horrible noises. We had a rod thrown through the engine and had to replace it ($3200). Then on Friday morning I was driving to work on the interstate when I lost all acceleration and the hybrid warning system started going off. I had my mechanic look at it and he told me I will need to replace my transmission, he also said this is a know problem with the Hyundai Sonata hybrids. It is about a $4000 replacement. Please help those of us that put our trust in this vehicle and are now paying for it.

- Brandon, SD, USA

The power to the engine cuts out when the lights are turned on.

- Winchester, CA, USA

The contact owns a 2012 Hyundai Sonata. While driving approximately 65 mph, the check engine, electronic power steering, oil, and low battery warning indicators illuminated. The contact pulled over and turned off the vehicle. Once the vehicle was restarted, the contact attempted to re-enter the highway; however, the vehicle lost motive power. The vehicle was towed to an independent mechanic who diagnosed that the connecting rod bearing in the engine showed stress fractures. The contact was informed that the engine needed to be replaced. The vehicle was towed to Hyundai of asheville (located at 860 tunnel rd, asheville, nc 28805, (828) 298-4911). The vehicle was not repaired. The VIN was not included in NHTSA campaign number: 15V568000 (engine). The manufacturer was notified of the failure. The approximate failure mileage was 140,000. Piir=Y.

- Hendersonville, NC, USA