Vehicle lost power leaving me stranded. All lights on dash came on, lost power, and barely able to steer to get off the road. We had to have it towed. The vehicle was towed to our mechanic, who states the motor seized up. Mechanic states there is no repair for this issue. Car has just been paid off. Now we have nothing!

- Laurel, DE, USA

I started taking my car to the dealer in 2023 for engine problems, including high oil consumption and stalling. The dealer kept telling me to return in 1,000 miles instead of fixing it. The issue was officially documented again in March 2024 (RO #131797) with -??Cause: high oil consumption.-?? Despite paying \$356.46 for repairs, the problem was never resolved and now the engine has failed

- Tarzana, CA, USA

The engine light started to come on and go off and when I got the codes ran, it said something along the line of misfire. I had the spark plugs changed and I kept regular maintenance done on oil changes and tune ups. Now my engine is knocking and the vehicle is in limp mode.

- Hephzibah, GA, USA

Dear NHTSA Investigations Team, We are the owners of a 2015 Hyundai Sonata, purchased in 2016 and still in use today. This vehicle is suffering from severe engine issues linked to the Theta II engine defect, which has been the subject of recalls and class action lawsuits. For nearly a year, we have been forced to add approximately 2 quarts of oil every week due to extreme oil consumption. This is unsustainable, unsafe, and clearly linked to the known recall defect. The most serious incident occurred when my wife was driving on [XXX] in North Carolina, and the vehicle suddenly lost power. It could not maintain safe highway speed and had to be pulled off the interstate, requiring a tow more than an hour back to our home. This was a frightening event that could easily have caused a crash. We later discovered that our vehicle was included in the Theta II engine recall, but we never received notice due to a change of address. Despite this, Hyundai Motor America has refused to help, citing that the recall was -??closed.-?? Shockingly, one representative even told us to -??keep putting oil in it until the engine blows, -?? at which point they might reconsider. This is an unsafe and negligent response to a well-documented safety defect. To make matters worse, when reviewing our VIN for other recalls, we found that the panoramic roof air dam recall was falsely listed as -??repaired.-?? We never received notification of that recall, and the repair was never performed. The air dam detached years ago, and we have avoided using the sunroof since then due to noise and safety concerns. We have contacted Hyundai corporate multiple times, and we also filed a formal complaint with the North Carolina Attorney General-??s office. To date, we have received no resolution and no meaningful response to our case from either Hyundai or their representatives. Summary of Issues: 1. Failure to notify us of the Theta II engine defect recall. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Bolivia, NC, USA

The contact owns a 2015 Hyundai Sonata. The contact stated that while driving at an undisclosed speed, the accelerator pedal was depressed; however, the vehicle failed to accelerate as intended. The contact stated that the vehicle failed to accelerate above 10 MPH. The vehicle was driven to the shoulder of the road. In addition, the check engine warning light was illuminated. The vehicle was towed to the dealer, where it was diagnosed with a failed knock sensor. The contact was informed that the engine needed to be cleaned. The vehicle was not repaired. The contact referenced an unknown extended warranty for the knock sensor; however, the contact was informed that the repair was not covered under warranty or recall. The manufacturer was made aware of the failure, and a case was filed. The failure mileage was approximately 103,500.

- Las Vegas, NV, USA

P1326

- Murrieta, CA, USA

I had a standard oil change done on my car and it was running fine afterwards. Later that evening, my car started smoking and spontaneously burst into flames from the hood. The fire originated in the hood of the car and melted the entire front of my car as well as the entire inside. It burned a lot of fuel and oil, which leaked onto the ground and continued burning on the ground. My car was overtaken by flames in a matter of a few minutes. It burned so fast that there was nothing I could do to stop it. I was not aware of anything wrong with my engine or fuel lines, or anything like that. However, something was very wrong for the engine area to catch fire like that spontaneously.

- Boerne, TX, USA

I have contacted the guy that sold me the car he Refused to fix the recall which is my motor I need Something done, Hyundai won-??t Honor their Recall.

- Saraland, AL, USA

My car 2015 (Hyundai Sonata)started leaking oil, it only had 50,000 miles. my mechanic said the motor had too much pressure and kept pushing oil out. He advised me to take it to the dealership for a motor recall. The dealership gave it back with a list of things to fix. replaced the valve cover gasket but still leaked oil. I found out these cars have an oil leak problems that are not being addressed. My car went up in flames 2 weeks later. I have done everything I could to save this car but nothing saved it. My grandkids were in the car and it had traumatized them.

- Las Vegas, NV, USA

I bought this sonata one month ago. Driving down [XXX] in bonita springs Fla the car shut down. No noise all dash lights came on I got to a safe place. Sat in the parking lot of fresh market for at least 30 minutes went to start it and nothing happened. No crank nothing. AAA came towed it to my house. The filling day I checked the battery it is good. So had it towed to Scotty-??s automotive. They called me Friday morning and said the motor was locked up. According to Carfax the car was at brand ton Hyundai in May of 25. I called after I bought the car Carfax said they found the alignment was off. I called to see if they did the alignment they said they did not do it. The wholesale it. My thinking is they did service it according to Carfax report and knew there was signs something and wholesale it. I did not buy it from Brandon Hyundai I bought it from a guy in Leigh acres Fla. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Cape Coral, FL, USA

We were informed by our mechanic that the engine needed replacement due to a timing chain issue. The engine warning light was blinking continuously, and the RPM would not rise above 1.9 even under acceleration. Upon further inspection, the mechanic found that the issue extended beyond the timing chain - the entire engine appeared to be failing. When we changed the engine oil, it became dirty almost immediately, and visible metal shavings were present in the oil, indicating internal damage. These symptoms suggest potential engine failure, which is consistent with known issues in some Hyundai Sonata models. We believe this may be related to broader engine defects and request that this be investigated for potential recall eligibility.

- Leesburg, VA, USA

Using 5 quarts of oil in 3 days.

- Merrillville, IN, USA

The car was on a major highway, went to pass another car and the engine stopped working. While trying to get the car off the road there was almost an accident involving on coming traffic.

- Lewisburg, PA, USA

The turning signal gives the opposite signals sometimes.

- Frankfort, KY, USA

The car burns oil. I have to put oil in it every few weeks. Also will start shaking while acceleration. I replaced engine coils several times. Main issue is burning oil, don't know why.

- Dallas, NC, USA

Our 2015 Sonata has experiencing Engine failure several times due to excessive and irregular oil consumption. Our family-??s safety and the safety of others on the roadway were put at risk as the engine slows, shudders and stalls without prior warning and the check engine light does not come on until the vehicle slows and stalls. The vehicle was inspected at a local Hyundai dealership, and they indicated that this is not covered under warranty. Summary of Engine Issues and Failures: 1.May 3, 2022 -?" 68,671 miles (local Hyundai dealer) Check engine light on, shudder; oil change performed. No cause identified. Paid out-of-pocket. 2.August 23, 2022 -?" 75,527 miles (retail shop) Car engines failed on highway, towed to service shop. Valve cover gaskets replaced. Paid out-of-pocket in part and extended warranty paid part of the invoice. 3.April 29, 2024 -?" 109,229 miles (local Hyundai dealer) Excessive oil consumption noted; valve cover gasket replaced again. Paid out-of-pocket. 4.January 22, 2025 -?" 118,341 miles (local Hyundai dealer) Vehicle stalled en route to airport, towed to dealership; dealership advised oil change. Paid out-of-pocket. 5.May 20, 2025 -?" 122,000 miles (local Hyundai dealer) Engine codes P0300, P0302, P0303 identified. Dealer diagnosed excessive oil consumption likely due to ring wear or sticking rings, contributing to spark plug misfires. Recommendation: Engine replacement. Despite consistent and timely service, including multiple visits to the Hyundai dealership, the root issue has not been properly addressed. The current diagnosis of internal engine failure is a clear continuation of a pattern of unresolved engine problems (stalling in motion, oil leaks and oil consumption) all of which originated well within Hyundai-??s original warranty. The vehicle has been well maintained, and all recalls have been addressed in a timely manner. Hyundai-??s failure to acknowledge and take responsibility for this widely documented engine issue is a safety concern.

- Bondurant, IA, USA

The car has had an electrical issue ever since taking to to get a recall around may of 2023. It will randomly brake and shift the transmission badly while downshifting. I feel as if my make and model falls under the theta II campaign they had to replace certain engines for having a knocking rod be fault and release shaving into the engine causing it to misfire. Not only that but the electrical issue is completely random it happens atleast once or twice a week. It had began ever since I took it for a recall, and when I took it back they found no issue and left food in the back of my car and the chairs leaned back. This was the Fontana Hyundai dealership

- San Bernardino, CA, USA

Multifunction box is in the steering column that controls your lights, signals, I put my turn signal on right or left at night and my lights go out, but they come back on.also I have zero warning lights on my dashboard for when something happens it let's you know, well I have none. Hyundai of California says it's not unsafe.it should be a recall because it's a thousand dollars for update..

- Bedford Hts, OH, USA

I've been in communication with Hyundai Henderson, Nevada and Hyundai Corporate as result of engine problems with my 2015 Hyundai Sonata. Corporate instructed Hyundai Henderson to submit a "Goodwill Warranty Repair order. However Hyundai Henderson, who has already determined that the vehicle has total engine failure, is requiring that I complete the thousand mile oil consumption test. My car has already proven to be unable to drive a couple hundred miles before losing acceleration. This is a huge safety issue to ask a consumer to drive this vehicle or to put this vehicle on the road as it is. Please advise on how I may move forward with Hyundai Henderson and Hyundai Corporate. * I have my entire battery/oil/repair/tire history - will scan and submit if needed/ upon request - unable to attach here. Sincerely, [XXX] [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Las Vegas, NV, USA

I was driving down the road the engine started making a loud knocking noise and as I pulled over it lost power and shut down it would not crank back up I had to have it towed to my house. There was no warning sign.

- Darlington, SC, USA