The engine suddenly seized up on me. Was told by my mechanic that that year and make once they get to a certain mileage gets premature engine failure. I looked it up and that year has a huge problem with this issue.

- Kill Devil Hills, NC, USA

This car has oil consumption issues due to a manufacturer defect, design of the engine 2.4L. This has been on going for the last three years and is getting worse. Now is affecting the catalytic converter because of it burning so much oil. The Hyundai dealership will do nothing for me. Now they want $4,500 for a new catalytic converter. I can-??t afford a new car and this should be an expense of Hyundai. In my research I have found there are thousands of cars on the road with this issue. They knew about this years ago and just kept making the cars and selling them. They should be helping me and all they are doing is denying that this has a problem. What recourse do I have. Why hasn-??t there been a recall?

- Brighton, CO, USA

My engine failed. Dealership put it through an oil consumption test which it failed. They ended up keeping my car for 3 weeks to build a new engine, add new belts, new spark plugs and new filters to go with the repair. After completing this repair they told me they noticed my air bag light on. They recommended a new sensor to fix it. Which I was to pay $600 for. I agreed to this and had it done. I picked up the car and had it for 3 weeks before the airbag light came back on. I brought it back to dealership. They assessed it and told me the problem actually came from the seat and the total.to repair the whole seat would be $2500+ I am the only owner of this car. It has never been in an accident where the airbag deployed. It is in it's original state. I feel this is a huge safety concern that should be looked into.

- Marshfield, MA, USA

What component or system failed or malfunctioned, and is it available for inspection upon request" Blown head gasket How was your safety or the safety of others put at risk? Engine overheated and coolant boiled in 110 degree weather. Has the problem been reproduced or confirmed by a dealer or independent service center? Yes by Hyundai. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? Yes by Hyundai. Hyundai states that engine needs to be replaced because the head gasket isn-??t repairable on the 3.3L engine. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear" No, engine overheated once and diagnosis was blown head gasket.

- Las Vegas, NV, USA

My vehicle we bought from carvana has been jerking/misfiring and now with no warning on freeway it wouldn't give power stalling. There was no warning nothing no lights came up. I drive my kids in this vehicle I've taken it to multiple mechanics they say they couldn't find why it's jerking and it must be a manufacturer issue. I looked online and yes lots of issues with the make and model recall about the crankshaft sensor cause these issues!!!

- Chandler, AZ, USA

Subject: Urgent Safety & Warranty Concern -?" 2017 Hyundai Santa Fe Sport (TSB #21-01-002H) Dear Hyundai Customer Care and NHTSA, I am reporting a serious safety and warranty concern regarding my 2017 Hyundai Santa Fe Sport (VIN: [XXX], mileage:97,320). The vehicle is exhibiting excessive oil consumption after an initial Consumption test burning 3quarts of oil in 725 miles as well as causing damage to the intake manifold requiring it to be repaired and is consistent with the connecting rod bearing defect covered under Hyundai TSB #21-01-002H. This TSB extends engine coverage to 10 years/120,000 miles for precisely this issue. Despite this, my authorized dealer, Premier Hyundai of Moreno Valley has refused to take immediate corrective action and is requiring me to drive an additional 1,000 miles before performing the repair -?" a delay that increases the risk of catastrophic engine failure and endangers vehicle occupants and other motorists. Key points: This is a documented defect with a known history of sudden engine failure. TSB coverage and my warranty should apply immediately, without dangerous delay. The dealership-??s requirement to continue driving the vehicle is unreasonable and unsafe. I am requesting: Immediate authorization for the engine diagnostic and replacement under TSB #21-01-002H. Confirmation from Hyundai that I am not required to continue operating a defective engine to -??prove-?? the defect. NHTSA to log this complaint as part of the ongoing safety concerns regarding Hyundai Theta II engines. Please respond within 5 business days with next steps. I am prepared to provide full maintenance history, documentation, and dealership correspondence. Sincerely, [XXX] [XXX] [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Moreno Valley, CA, USA

My vehicle is a 2017 Hyundai Santa Fe Sport AWD with a GDI Theta II 2.4L 4 cylinder engine. We purchased it in Feb. 2024 with 120,310 miles. Since then we have only put approximately 8,000 miles on it in 17 months. On Aug. 1st 2025 while driving up a hill out in the country the engine suddenly quit. Of course the steering and the brakes failed to operate. However I was able to coast to the next road and barely able to turn the wheel but made the corner and coasted to a stop. Without a nearby corner I would have been stuck on a state highway with many semi-trucks traveling on it. Could have been much more dangerous for my wife and I especially since we had to have the car put on a flatbed to be hauled home. The person who came to haul it checked the battery which was fine. You could hear the starter engage and try to turn the engine but it would not turn one bit. Once home we had a mechanic with many years experience have a look and listen to it. He could not get the engine to move even when trying to turn it by grabbing the engine belts and pullies. By all appearances the engine is seized. No warning lights were one and the oil was checked that very morning before leaving home. The vehicle was using about 1 qt of oil every 200 miles or so. Always used a high quality oil of proper weight/viscosity. Had no visible oil leaks on ground where it was parked every night. Hesitate to spend hauling fees to take it to the dealer 40 miles away if they are not going to do anything but offer to replace it for many thousands of dollars. For a couple living on social security this can absolutely turn things upside down as we only own one car (which we still owe on).

- Janesville, WI, USA

Motor replacement. I had taken my car several times into Hyundai for oil consumption issue. I replaced the recommended parts through Hyundai and ended up having to come right back after being stuck on the side of the interstate due to lack of compression two cylinder two I was told I needed to replace the motor. This has been a very expensive process and I haven-??t had the car but 10 months.

- Nashville, TN, USA

Hyundai knows about the excessive oil consumption of these 2.0 Turbo GDI engines. My engine went out while driving my daughter down the road. Had to tow it to the dealer. Dealer is saying no compression on cylinder 3. Also a known issue. There was a massive lawsuit over engines already. Hyundai is no help. Excessive oil consumption has led to my engine going out. This needs to be investigated by safely board and Hyundai.

- New Albany , MS, USA

Driving on main road, car came to complete stop while waiting on traffic light and vehicle loss power, and wouldn-??t accelerate. No, dash lights nor sounds were on prior to it loosing power nor stalling.

- Virginia Beach, VA, USA

I am reporting a sudden engine failure involving my 2017 Hyundai Santa Fe Sport 2.0T. At just 68,000 miles, the vehicle experienced catastrophic loss of power due to zero compression in Cylinder 1. The vehicle is equipped with the Theta II turbocharged engine, which has been the subject of previous investigations and safety recalls due to premature failure risks, including stalling and fire hazards. This failure occurred on [XXX], while I was driving on the highway. There was no warning. It put all drivers near me at risk as I had no power, was traveling in the left lane and had to navigate through 3 lanes of traffic to reach the breakdown lane. I request that this case be investigated further as a potential safety risk and recurrence of known issues with this engine type. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Middletown, CT, USA

This vehicle has experienced numerous serious failures, including two engine replacements, a transmission replacement, and persistent safety system malfunctions. The Downhill Brake Control (DBC) system remains stuck in the "on" position, and the traction control warning light stays illuminated. These issues directly compromise vehicle safety and stability, particularly on hilly or wet roads. Despite extensive service at Arapahoe Hyundai in Centennial, CO, these problems continue to return. The vehicle has been in the shop multiple times and was most recently in service for nearly 30 days. My wife was stranded at the dealership today due to the same unresolved safety system failure. Dealer communication has been poor, and repairs are often incomplete, requiring immediate return visits. The repeated failure of safety-critical systems, combined with the inability to resolve the issues long-term, presents a significant safety concern for both my family and others on the road. I am requesting NHTSA to investigate whether this is part of a broader defect pattern affecting 2017 Hyundai Santa Fe models and if a recall is warranted.

- Arvada, CO, USA

The car has been consuming all the engine only after 700 miles. This has been a constant issue since December 2024 and the issue has been brought up with Hyundai dealership in Denville, NJ and Hyundai Corporate as well. Hyundai dealership in Denville, NJ performed 2 oil consumption tests, which the vehicle failed both test only after 700 miles as it consumed all the engine oil. They refused to do further investigation or recall the engine as it should be covered under Hyundai TXXI warranty given the Hyundai Engine II Class Action Settlement a few years ago. The vehicle has broken down on me on the highway a few times and has put my family at risk and danger due to the negligence of the Hyundai dealership in Denville, NJ and Hyundai Corporate refuel to resolve the issue. Now the car does not start at all some days thus it has impacted my work and my ability to provide for my family

- Boonton, NJ, USA

My car had a thrown connecting rod-the problem described under TSB22-EM-006H-2 (TXXM/6G) which extends engine warranty to 150k miles/15 years for this exact issue my vin is listed my mileage is 113k and KSDS was completed (or I am exempt) please submit prior approval under the extended warranty for engine replacement. Hyundai is refusing to repair my car.

- Crete , IL, USA

This modle has a serious oil consumption caused by a manufacturerer design issure with the engine. As time goes by the oil cosumption get wores potentially seizing the engine while driving. I have to constantly fill with oil. This is a major safety concern with many hyundai vehicles.

- Greenbackville, VA, USA

Excessive oil consumption from metal shaving left in engine during production. causes accelerated engine wear and failure. Rod bearing failure. piston ring failure, high chance of fire in engine compartment.

- Louisville, KY, USA

Excessive oil consumption leading to p420 codes every 2000 miles. vehicle is consuming a half a quart of oil every 100 miles. could cause engine to seize while driving.

- Washougal, WA, USA

Was driving on [XXX] (approximately 130 miles from home), when a loud clunking and metal on metal sound was heard, the causing power loss, slowing of vehicle and necessitated immediate pulling over to the side of the road. The was a catastrophic internal engine failure which caused the spark plugs to blow out. There were no warnings. The car was just inspected and had an oil change earlier in the month. The vehicle suffered sudden power loss and violent metal-on-metal destruction while transporting my child on [XXX] (130 miles from home). Certified diagnostics from Kennett Square Quick Lane Auto confirm: "Multiple spark plugs forcibly ejected due to severe internal engine damage -?" full replacement required". Quick Lane said they would not be able to replace the Engine. so the Vehicle was towed to Reliable Car Connection (West Chester, PA). I had tried to make an appointment at Piazza Hyundai, but the did not have appointments until Mid August. Result: Stranded overnight requiring hotel and towing/tolls at personal expense (receipts available). This traumatic event directly stems from Hyundai-??s acknowledged Theta II defects. Hyundai-??s Documented Failures: Recall Compliance: Recall 996 (Piazza Hyundai, 4/12/24) Recall 953 (1/31/19) Recall 163 (7/18/17) Maintenance: All services performed per Hyundai schedules (records available). Unresolved Defects: This failure matches: Recall 20VH4 (Lifetime Warranty Extension) Recall 20VH5 TSB 20-01-033H Current Status: Vehicle at Reliable Car Connection (West Chester, PA) after Piazza Hyundai-??s unacceptable 6-week delay. INOPERABLE & UNSAFE -?" Cannot transport children. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Kennett Square, PA, USA

The turbocharger failed on my 2017 Hyundai Santa Fe Sport 2.0T. It is still on the vehicle and available for inspection upon request. The turbo failure caused a severe loss of engine power, making acceleration dangerously slow and unpredictable, especially when merging onto highways or passing vehicles. This sudden reduction in power could have caused a rear-end collision or made it impossible to avoid faster-moving traffic. Yes. The failure was confirmed by two independent service centers: Mavis Tires and Brakes, and Tires and Trust in Pensacola, FL. Both observed loss of turbo boost and excessive oil consumption consistent with turbocharger failure. Yes. The vehicle was also inspected by Allen Turner Hyundai in Pensacola, FL. They did not detect the failure during their inspection, but the issue persisted and was documented by the other two shops. The check engine light came on around 118,000-?"119,000 miles. After that, the turbocharger lost significant power, making the vehicle unable to accelerate normally. At the same time, the engine began consuming oil at an abnormally high rate, requiring frequent top-offs between oil changes. This suggests internal oil seal failure in the turbo or related component issues. These symptoms are consistent with failed turbocharger bearings or seals, oil starvation, or blocked oil lines causing overheating and damage. Such failures can release oil and metal debris into the intake and exhaust systems, risking further engine damage or even fire. Hyundai previously issued a software update (KSDS) to detect early bearing wear in these engines, which my vehicle received in 2019 (Service Campaign 953). Despite this, the turbo failure still occurred, suggesting the underlying design or manufacturing issue may not have been fully resolved. I am requesting that NHTSA investigate this pattern of failures, given the safety risks of sudden power loss and potential fire hazard from oil leaks.

- Pensacola, FL, USA

The contact owns a 2017 Hyundai Santa Fe. The contact stated while driving on the highway at 65 MPH, the contact heard a loud bang coming from the engine. The contact stated that immediately afterwards the vehicle started losing motive power with smoke coming from the front and the rear of the vehicle. There was no warning light illuminated. The contact pulled over and had the vehicle towed to a local dealer to be diagnosed. The contact was informed that additional diagnostic tests were needed to determine the cause of the failure. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage 152,530.

- Antigo, WI, USA