I can-??t drive my car on the highway cause then it will shut off and say HEV system error and I have to shut my car off turn it back on then erase the code with my diagnostic tool. My oil light keeps popping up and whenever I slightly press on the gas pedal or go up a steep hill, it starts to rattle, been noticing my oil burns out fast and I have to replace it when it gets low.

- Chula Vista, CA, USA

I am filing this complaint regarding a significant safety concern with my 2017 Hyundai Sonata. Since around 65,000 miles, my vehicle has experienced excessive engine oil consumption. The issue has progressively worsened, and my car now has 126,000 miles. Despite undergoing an oil consumption test that confirmed the rapid depletion of oil, Hyundai and their dealerships have failed to provide a resolution. This defect requires me to add oil approximately every two weeks. The excessive oil consumption poses a potential safety hazard, as the engine could seize unexpectedly while driving due to insufficient oil levels. The risk of engine failure is further exacerbated by the lack of sufficient warnings from Hyundai regarding this known issue. This situation not only jeopardizes the safety of myself and my passengers but also other drivers on the road. I am requesting that the NHTSA investigate this matter, as it appears to be a widespread issue among Hyundai vehicles. Prompt action is necessary to ensure consumer safety and hold the manufacturer accountable for addressing this defect. Thank you for your attention to this serious matter. I am happy to provide additional details or documentation upon request.

- Edgewater Park, NJ, USA

The makes a weird shutter noise when accelerating and won't crank over 60. Loses power when turning or when going uphill. Sometimes has problem starting. Enging light came on twice blinking, once I changed the battery it went off and was working fine. Now it's back on again after a few weeks. Plus my oil tank still comes on and I've just received and oil change. I just bought the car in August of this year, dealership sold to me with a faulty battery.

- Mechanicsburg, PA, USA

Driving home car just shut off still had power to steer and brake but no engine. Pulled it off the main road and it leaked oil but still no engine. Already had the dealer replace the intake manifold at my expense despite hyundai knowing the plastic lever inside fails. We were lucky the snowplow was going the opposite direction as the weather was horrible as we got closer to home. I have a dead car in my yard waiting to have a dealer look at it. We could have been killed due to fault of engine.

- Spencerport, New York, United , NY, USA

The contact owns a 2017 Hyundai Sonata. The contact stated while driving at an undisclosed speed, the vehicle stalled with the check engine warning light illuminated. Additionally, there was white smoke coming from the engine compartment and the exhaust. The contact retrieved DTC code: P0420 for spark plug failure. The spark plugs were replaced; however, the failure reoccurred. The vehicle was diagnosed with spark plugs and catalytic converter failure. The spark plugs were replaced. The contact stated that the spark plugs looked burned. The vehicle was taken to an independent mechanic where the catalytic converter was replaced; however, the failure reoccurred. The contact stated that the vehicle had been consuming an excessive amount of engine oil for almost two years. The contact stated that engine oil was added every 600 miles of driving. The vehicle was not diagnosed or repaired by an independent mechanic or the dealer. The dealer was made aware of the failure and provided the contact with the cost for a diagnostic test. The contact declined to pay for a diagnostic test. The manufacturer was made aware of the failure and a case was filed. The failure mileage was unknown.

- Fort Worth, TX, USA

The engine started knocking while I was driving around a lot of cars and while I was going to AutoZone to see why the check engine light was flashing on my car wouldn't accelerate and randomly started stopping and I was fearing for my life when I was going on the highway to go back home. For almost a year now I noticed the oil in my car started burning more and more like I would only drive 1k miles and it would already be done with, so I had to replace it. Hyundai knows this is a problem with this car because I called and asked them about the oil and told me specifically it's an engine problem once it starts knocking then you can come fix your car but want me to pay and fix the whole engine and work process.

- El Paso, TX, USA

The contact owns a 2017 Hyundai Sonata. The contact stated that within a two week period she has add to add 2 quartz of oil in the engine though she has yet to observe an oil leak. The check engine warning light was illuminated. The vehicle has was not taken to a dealer in independent mechanic. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 161,000.

- Berryville, AR, USA

The drivers seat belt does not engage. The engine has been burning oil, misfiring, and even after thousands in repairs was returned to me by the dealership with continued misfiring. When returning the car back to the dealer service center days later after Hurricane Helene, the car continued to misfire and became so overheated the engine light was flashing. Upon calling for a tow, I attempted to raise the hood for the driver to locate the car, but the hood was so hot it burned my hand. The engine was so hot, I believe it was about to catch fire and would have had I not been able to pull over so quickly. Had I been driving on the Interstate, I have no doubt this car would have been on fire within minutes.

- Sarasota, FL, USA

The contact owned a 2017 Hyundai Sonata. The contact stated while the vehicle was parked, the contact noticed smoke was coming from the engine compartment. No warning light was illuminated. The contact exited the vehicle and discovered that the engine compartment was on fire. The vehicle was not occupied during the fire. The local Fire Department (Cuyahoga Heights Fire Department) came and extinguished the fire; a Fire Department report was filed. A police report was not filed. The vehicle was not drivable and was diagnosed as totaled. The manufacturer was notified of the failure. The failure mileage was approximately 90,500.?

- Barberton, OH, USA

The car has been experiencing oil consumption issues for the past 15k miles and it's getting worse hyundai says.y vin isn't under recall and they can't help me. My mechanic says my oil consumption is high and is concerned about potential engine failure. I have to add oil every 500 miles. The 2.4l engine has had major issues but Hyundai will not expand the recall. My mechanic has seen issues like this but Hyundai won't do anything. I have friends with engine failures in similar Hyundai models. This has been going on for about a year when I had mileages in the 77k range. I now have 99k and the oil consumption is getting worse. I am very easy on this car and always do full synthetic changes at the Hyundai recommended intervals for the severe driving schedule. I've never had a car costume anything close to the amount of oil I am using including two other Hyundai I have owned.

- Mays Landing , NJ, USA

The engine is losing oil at a much higher rate, causing a knocking sound. Not accelerating at it should without the sound getting louder and hesitating. This vehicle has been inspected by a licensing mechanic ( Goodyear). The check engine lights and multiple codes have appeared while driving for about the last 4-5 months.

- Conyers, GA, USA

Motor burning oil with no leaks causing it to need replaced, with out any reasoning.

- Topeka, KS, USA

Excessive or consumption. Purchase a car three weeks later car started misfiring I was able to get the car to a mechanic shop. I was told that the car needed a tuneup, spark plugs and ignition call was changed mechanic noticed oil on top of the engine and advise me to get an engine gasket. Gasket was replaced 2 weeks later oil light comes on I added 5 quart of oil the light goes off I notified the mechanic again was able to get the car in the shop took mechanic replaced the gasket week later oil light was flickering took the car to have oil change. There was no oil in the car, three weeks later oil light flickering again checked oil it was empty I added five more quarts to the car and took the car back to the back the mechanic one he inspected it he informed me that the engine in the car for some reason consume a lot oil and that I should take the car to Hyundai dealership. I checked Hyundai recall for the oil consumption issue the car model I have is not apart of the recall. I could have lost my life when the car stalled due to oil is leaking where the spark plugs are located. Hyundai need to recall all 2013-2017 Hyundai sonata and Elentra

- Houston, TX, USA

I have had many problems with my car since 1st day of purchase timing belt oilpans valve cover gasket burning excessive oil caliper brake hose last few events I have experienced my ABS light coming on in the car stop moving while am in traffic very dangerous I work for the hospice reserve one day while driving the car started shaking compulsive and the check engine light came on I was informed oil was leaking onto my spark plug and engine was going out I experienced extreme hot air inside the car coming out vents back firing etc my warranty in finical company seems to be ripping me off more concerned about money I have reported all these problems to them the past 13-14 months i was suppose to hear back from lisa warranty about this problem this past week no contact I reached out to Hyundai Corporation after visiting local dealership on Bedford automile a service rep by the name of aaron basically told me they cannot help me car will need a engine

- Cleveland , OH, USA

In early June 2024 while driving 65 MPH vehicle started shaking, engine and oil light came on, losing power, noisy and only would go 50 MPH max. When destination reached, checked oil level (was low) added oil.Took the vehicle to auto repair shop. Review showed a misfire in cylinder #2 with plug oil fouled and recommended new engine. The car was taken to the Hyundai dealer who performed various diag. procedures via communicating with their Techline who ended up rejecting the request to replace the engine due to the milage (136K) being out of warranty. They would replace engine if the connecting rod bearings had wear or damage. Hyundai national consumer affairs contact given for the case refuses to listen to any information given and only states vehicle is out of warranty. Hyundai knows this engine has manufacturing issues causing them to wear out prematurely including excessive oil consumption. They should extend the warranty to at least 150K. Afraid to drive car as engine may suddenly stop or catch fire causing accident/injury to occupants. Please help!

- West Allis, WI, USA

Vehicle is burning oil. Have been using fully synthetic oil at regular 3000 miles. And have been increasing -??burned-?? more oil before each oil change. Valvoline Instant Oil Change is the shop I-??ve been going to for my oil serviced maintenance. My last visit I had 1 quart of oil left in my engine.

- Centerton, AR, USA

I have to add a quart of oil to car a day tul the motor blew

- Carlsbad, NM, USA

Engine is burning a lot of oil. Having to get frequent oil changes due to the engine burning oil.

- Milwaukee , WI, USA

The car is burning through oil at an excecated rate. This is a well-known issue with this make and model. The dealer said they fixed the problem, and they did not. This engine needs to be replaced. It was inspected by a mechanic not affiliated with Hyundai. Hyundai has refused to replace the engine. This should be covered by the 15 year/ 150,00 engine warranty. This engine could seize up at any time. It is a hazard to be driving. The driver is an 80-year woman. She needs help.

- Baldwin Place, NY, USA

Bought a car. In couple days check engine light came on, it was blinking and car was put on limp mode, rpm between 1800-2000, speed 60-62 mph. Went to dealership they did full diagnostics, told that they are going to submit to Hyundai to replace engine at their cost. Hyundai came back that they want to replace knock sensor and then see what-??s gonna happen. I replaced and was told that i have to pay even though there is a recall on Knock sensors. They replaced the sensor which was over 600$. And the problem came back in less than 36 hours. Now the vehichle is back again at the dealership and they gonna do diagnostics again. Which is ~200$. I need to help this resolved as i-??m only being ripped off with no solution. The vin says it doesn-??t have any recalls, but vehichle is experiencing exactly what-??s on recall. The vehicle has been in the shops for a month now. Thank you

- Mint Hill, NC, USA