My car idles very rough at times, and sometimes when idling, it dies out. At times it is difficult to even start as if it's not getting the electrical signal to the engine. Hyundai replaced the fuel pump, but that did not fix the problem, but cost $1,200. No warning messages. Two other automotive companies also did a diagnostic tests, but couldn't find the problem as it seems it has to be tested WHEN IT IS ACTING UP. It died on me far from home a week ago, but eventually restarted. I'm afraid to drive it especially at night as it died when idling at a light and almost didn't restart.

- Naples, FL, USA

While driving the vehicle within the city the engine turned off in the middle of the intersection causing near miss in the middle of the intersection as other vehicle were trying to pass me because my vehicle stalled. After having to towed the vehicle it was found that the engine has seized which is why the vehicle stopped.

- Madison, WI, USA

While driving on the highway my vehicle started making a very loud ticking noise and all of a suddenly my car stopped working. Due to being on the highway everybody was going high speeds which almost caused a serious accident. There were cars swerving everywhere. I truly thought I was going to be involved in a high-speed accident which would most likely cost me my life. The check engine light came on and smoke was coming out and the dash started throwing errors. One of the drivers came to my car and started yelling to get out because these cars have been catching on fire. I had to call a tow truck to tow my car over an hour back home which cost me quite a bit of money. After I got home I researched my vehicle and placed to VIN to find out there were 3 safety recalls, one that could cost my family their lives and I was never ever notified. When I called the customer care they didnt even have my information and had to input it all to create a case. They also could not give me a reason as to why I was not notified. They then made an appointment with the Hyundai nearest to me which by the way is an hour and twenty minutes. After disconnecting the call I received an email from that dealership stating my appointment was canceled. I called the dealership to figure out what was going on I've spoken to two different people before finally speaking with the manager of the department. Finally when I spoke with the manager he tried to inform me that my car was not under the recall and that they wouldnt be fixing my car. They also tried to tell me that customer service placed the wrong appointment that they put it in for an oil change when clearly the email stated three recalls and one being my engine needed to be replaced. I was informed that the earliest that they could Even put their eyes on my vehicle would be the end of March and if I wanted to pay out of pocket for the engine it wouldn't be completed until the end of June. One person after another has lied to me.

- Winchester, TN, USA

The contact owns a 2016 Hyundai Sonata. The contact stated that while driving approximately 25 MPH downhill, the vehicle stalled. No warning light was illuminated. The contact was able to coast to the side of the road and had the vehicle towed by AAA. The dealer diagnosed that the engine had failed and needed to be replaced. The vehicle was repaired with a rebuilt engine. The manufacturer was made aware of the failure. The approximate failure mileage was 65,000.

- Baltimore, MD, USA

Burns oil at an extraordinary rate. Takes about 1-2 quarts every week. No leaks, I-??m unsure what the cause is for the oil burning so fast but it-??s not leaking because I-??ve gotten it checked for leaks and there is not oil stains or puddles when the vehicle is parked.

- Hesperia, CA, USA

Engine burns off oil at an excessive rate. I was told there is a recall on the engine for my vehicle. Also, the transmission is acting up. I have a white pearl sonata and the paint has peeled off the roof and part of the hood. There is a recall on that as well, as I was told.

- Houston, TX, USA

On April 12, 2022. I was driving with my grandson. I heard some loud engine noise in which I thought was coming from an old red truck next to me. I continued driving and continued to hear the noise after I was away from the truck. I realized the noise was coming from my vehicle (2016 Hyundai Sonata). The interior lights started flashing ( oil light, engine and battery lights) and the car started losing power. I was able to pull over to the right lane by the curb. The engine shutdown and wouldn't start back up. The car was towed to Jeff Wyler Superior Hyundai, 238 W. Mitchell Ave., Cincinnati, Ohio 45232. My vehicle is still there. In January of 2022 I had my car at the dealership for losing power. They repaired it, saying it was the cylinders and then in April 2022 the whole engine shuts completely down.

- Cincinnati , OH, USA

I have a 2016 Sonata with 81,000 miles, I was driving the car when I started hearing knocking noise under the hood and Suddenly the car cut off and wouldn-??t start. No dash board lights came on. Prior to car shutdown. My safety was put at risk because the car cut off near the highway and I had to push the car to a safe location. The dealer confirmed that the engine needed to be replaced at $8,500.

- Washington , DC, USA

I was driving the vehicle, it started making a weird noise, the console lights started flashing and then the engine shutdown and wouldn't start back up.

- Cincinnati , OH, USA

Purchased a 2016 Hyundai Sonata on 7/2/22. At the time, it had approximately 119,000 miles on it. About a month later, the car overheated. Thankfully, husband is a mechanic. Since the initial overheating, we had been diligently adding coolant every few days. However, as of last month, the overheating had gotten so bad, we took it to an independent mechanic who quoted us about $8,500 for repairs, including installing a new engine.

- Escondido, CA, USA

The contact owns a 2016 Hyundai Sonata. The contact stated the vehicle was consuming an excessive amount of engine oil. The vehicle was taken to a dealer, and it was confirmed that no cause for the failure was found. The contact then took the vehicle to an independent mechanic where it was diagnosed as engine wear, due to a lack of proper lubrication The vehicle was not repaired. The contact then took the vehicle to another dealer, North Freeway Hyundai (20440 Interstate 45 N, Spring, TX 77373) where it was diagnosed as needing the engine to be flushed. The vehicle was not repaired. The manufacturer was made aware of the failure but stated that the vehicle was out of warranty. The failure mileage was approximately 59,013.

- Magnolia, TX, USA

While driving the hybrid system warning light comes on and says to check hybrid system, vehicle goes into limp mode will not accelerate over 25 mph and codes need to be cleared before vehicle van be driven. This has caused me to almost have several accidents. The vehicle slows down and gives no warning prior to this occurring. It has started happening more frequently vehicle currently has 85k miles.

- San Antonio, TX, USA

Upon buying the vehicle the engine started to burn excessive amounts of oil.

- Terrell, TX, USA

My 2016 Hyundai Sonata is sitting at the Red Hoagland dealership in Winter Haven, FL after the engine started knocking. Rather than continue driving it and risk an accident with our 19-yr old child driving it, or risk worse damage to the engine, I had it towed to Red Hoagland service department. This occurred less than a week after we had it at the dealership for the third and final oil consumption test. These tests were being conducted as part of Hyundai-??s process to identify the known engine issue with this model. Each 1,000 mile test revealed that the engine was consuming approximately 3.5 quarts of oil per 1,000 miles (approximately 1 month timeframe). Despite the results of the tests and now the engine failure, Hyundai has denied the claim on the lifetime warranty of the engine. Their stated reason is -??out of warranty caused by time in service and mileage on the vehicle.-?? The mileage on the vehicle was 143,260 on 10/29. Apparently to Hyundai a -??lifetime warranty-?? on an engine that is known to fail due to this oil consumption issue does not mean -??lifetime-?? but only less than 145,000 miles. I will appeal this decision and if they do not honor their lifetime warranty on this known issue they will hear from my attorney and hopefully the NHTSA will also help to enforce what Hyundai should have already done rather then making me go through this additional effort and trouble.

- Winter Haven, FL, USA

Huge amounts of oil consumption, have to refill all oil every 20-30 days. Car shut down on highway and went into limp mode, had to impede traffic to attempt to pull over safely. Potential known issue with Theta II engine, but dealership is declining a fix.

- Silver Springs, NV, USA

10/9/22 I was traveling approximately 60 miles an hour on Hwy 25 in Hollister when I experienced Engine Failure in my 2016 Hyundai Sonata Sport 2.4 liter. Engine available for inspection. *This was the 2nd time the engine light has turned on and resulted in vehicle stalling while driving on the highway. Fortunately, there was no accident. *Hyundai Dealer, Hyundai Corporate, or independent service center have not reproduced or confirmed the problem. There is an extended warranty covering the rod bearing and associated parts, that was neither inspected nor granted by Hyundai. I also reported excessive oil consumption to Hyundai and was put through an "Oil Consumption test" at 120677 miles and was denied repair/replacement, even though the engine was burning more than a quart every 1000miles. This increased to me adding a quart every 500 miles and eventually the engine failed at 161147 miles. The vehicle is an independent mechanic awaiting an engine replacement. engine has not been inspected by manufacturer, police, insurance representative or any other entity for the mechanism of engine failure. It is confirmed loss of compression and blown pistons/piston rings. Hyundai dealer did not conduct rod bearing test. *Engine light turned on and engine stalled. It was then towed to Hyundai Dealer. There is an extended lifetime warranty on the rod bearings in the engine, which was not inspected by Hyundai prior denial of engine repair/replacement under extended warranty. Excessive oil consumption problem was also an ongoing problem which Hyundai refused to resolve. In my opinion the engine failure is due to either excessive oil consumption, or the rod bearing failure. Hyundai is not taking responsibility and resolving these ongoing problems with the GDI Theta engines.

- Hollister, CA, USA

The vehicle has had mechanical problems since I purchased it. I have submitted a complaint with the dealership who sold it to me and at their recommendation I am moving it up the ladder. The engine had the knock sensor go bad and also failed the bearing test. As I was driving the check engine light, oil light, and battery light came on and the vehicle lost all power. I was going 60 miles an hour and was barely able to safely get it on the side of the road. It had to be towed to the dealership I bought it from, who determined it had no oil in the reservoir and had burned through it in less than 2000 miles. There was no warning lights. I have had mechanical issues since purchasing the vehicle and they failed to correctly diagnose it. It had an oil consumption test that it barely passed months before the engine needed to be replaced. I travel extensively for work and the vehicle malfunctions put me at risk. It has broken down several times and took months to diagnose the issue.

- Johnson City, TN, USA

The engine light has come on and I have done extensive repairs on my vehicle since January 2022. No warning signs showed prior as I have kept up with maintenance on the car since the 60,000 mile marker. The valve gasket cover was replaced as the engine was smoking due to an oil leak. A pipe was repaired due to the leak. The engine camshaft position sensor was replaced. There is still issues with the engine after replacing the CVVT cover and plugs. The spark plugs have been replaced. If my car stalls or blows on the highway, this can cause a major accident putting myself and others at risk. I have done multiple tests with Hyundai dealerships and Firestone and AutoZone and no one can tell me what the ultimate issue is with the Sonata.

- Aurora, IL, USA

While driving at about 45MPH, the car lost and acceleration was limited as the car wouldn-??t work properly. Engine make a ticking sound when trying to accelerate. At the time of lost power the check engine(flashing), abs and traction control all came on. It almost caused me to get into an accident. The car also indicated to shut off vehicle. The vehicle code read P1326, called dealer and they stated multiple vehicles has been having the same issues and that they are full with no openings. So I-??m in the process of getting it to a dealer who has an opening for a better diagnostic. Dealer says it may be rod bearings.

- Powder Springs , GA, USA

2016 Hyundai Sonata (not part of any recall) driven short distance on expressway had "check engine light" come on. Pulled off of expressway and checked under hood...No visible issues. Chose to return home via side streets as car was riding rough and having problems with acceleration at that point. Short while later, heard loud noise and saw smoke coming from under hood. Pulled to the side of the road and exited car. Was told by bystander that car was on fire. Called Fire Dept, by the time of their arrival, entire front end ablaze, tires and body melted. Thankfully, fire extinguished before any explosion or damage to neighbor's property occurred. Vehicle was a total loss.

- Chicago, IL, USA