2018 HYUNDAI TUCSON Complaints

The contact owns a 2018 Hyundai Tucson. The contact stated that while driving approximately 15 MPH, and slowing down to make a right turn, the vehicle almost stalled and lost power. The contact stated that the check oil warning light was flashing on and off. The contact depressed the accelerator pedal, and the vehicle failed to respond. The contact was able to pull over and shift into park(P). The contact had not turned the vehicle off. The contact called her father. The father arrived, and the vehicle was turned off. The contact stated that her father checked the oil dipstick and saw that the oil level was extremely low. The contact stated that two quarts of oil were added. The contact drove the vehicle to a local dealer. The dealer diagnosed and determined that a gasket on the oil filler tube was not correctly seated, and the catalytic converter needed to be replaced. The contact stated that prior to the recent failure with the catalytic converter, the catalytic converter had been replaced approximately 1 year and 8 months prior. The dealer also recommended that the engine be replaced. The vehicle was not repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 102,000.

PARKED SUBJECT CAR IN GARAGE AT APPROXIMATELY 11:15 AM AFTER TURNING OFF VENTILATION FAN AND CUTTING ENGINE OFF, WHICH DISPLAYED "OFF" AT DASH BUTTON. AT APPROXIMATELY 7 PM (SAME DAY) WENT INTO GARAGE TO RETRIEVE ITEM AND HEARD THIS LOUD NOISE SIMILAR TO AN ELECTRIC CLOTHES DRYER RUNNING - WASN'T DRYER. AS I GOT CLOSE TO CAR, HEARD THIS SAME SOUND. RAISED HOOD AND COULD FEEL AIR MOVEMENT . CHECKED ENGINE OIL - NOT WARM. BACKED CAR OUT OF GARAGE INTO DRIVEWAY OUT OF SAFETY CONCERN IN CASE OF FIRE. WILL CONTACT HYUNDAI MOTORS TO REPORT THIS INCIDENT AND FOR INSTRUCTIONS WHAT ACTION I SHOULD TAKE NEXT. THIS IS THE FIRST INCIDENT REGARDING MY CAR"S ELECTRICAL SYSTEM. DURING THE 3 HOURS DRIVING THAT MORNING, I HAD NO WARNING SIGNS ON DASHBOARD OR FAN MOTOR RUNNING AFTER TURNING ENGINE OFF. HAD MADE 3 STOPS AND ENGINE START UPS DURING THAT TIME

My engine stopped and locked up. It happened while I was driving on the highway/interstate. Yes it has been diagnosed by the dealership. There was no warning lights prior to the system failure.

Drivers seat seat does not go up it stays in reclined position No it has not been inspected by the manufacturer No warnings was put in recline position and could not lift up happened a week ago I have to drive to work and it is unsafe driving in this position. I did take it to an autoshop and they said that it could be electrical which they were not equipped to do.

My connecting rod came apart and went through the oil pan while I was on the highway. There were no engine or oil lights until the engine was already smoking and no longer accelerating luckily I was in the far right lane already and was able.to coast to safety. Hyundai is also refusing to honor my warranty. It requires a completely new engine. So this was a catastrophic engine failure with no warning.

I own a 2018 Hyundai Tucson with 87,000 miles that consumes about four quarts of oil per 1,000 miles. I first noticed the problem at 51,000 miles, despite regular maintenance. The issue has worsened, repeatedly damaging spark plugs and causing the car to seize. Hyundai has denied my request for a replacement engine because I am the second owner. I bought the vehicle at 26,000 miles, believing it carried the 100,000-mile warranty. I was never informed that coverage drops to 60,000 miles for second owners. I have maintained the vehicle with oil changes every 3,000 miles, yet it remains unsafe to drive long distances. This defect presents a serious safety risk, and Hyundai has not provided a resolution.

There is a very well known issue with Hyundai (and Kia) and oil consumption issues, no recalls have been issued yet and I am another person dealing with this without any real support from Hyundai to solve the issue. In 2024 I did an oil consumption test, they found it was burning oil excessively and I had to pay $700 out of pocket for a cleaning they recommended. Afterwards it was burning only 1 quart every 1k miles which they said is acceptable so we moved on. Less than a year later I am still dealing with this issue only it has gotten worse, I am burning 5-6 quarts every 1k miles. I do keep up with my oil changes, I now have to check it and top it off almost daily, and even without being a car expert I know that something HAS to be done... why aren't there any recalls yet? Despite keeping up with my maintenance, there are other issues that can be related from this issue, including the engine stalling or skipping which is a safety issue when driving.

I was driving on the highway, about to change lanes, when I looked in my rear view mirror and saw black smoke coming from my appeared to be my exhaust. I immediately started to pull over, and that is when the oil light first appeared on my dashboard. By the time I had put the car in park, the check engine light had also appeared. After calling my boyfriend and a tow truck, I exited the vehicle and noticed a large pool of oil by my front tire. With the car on the tow truck, I could see oil continue to drip out. The car was towed to the local Hyundai dealership. Since this occurred on a Saturday afternoon, the service dept. was closed, and Hyundai called me on Monday, Aug 11, 2025 to explain that i should contact the auto mechanic that last changed my oil, as the oil plug had fallen out, and my engine had seized. (Had I not noticed the smoke right away, I could have been in an accident on the highway when the engine seized.) I explained to Hyundai that I had my oil changed 3,000 miles ago, and hadn't seen any indication of oil leakage, nor had the oil light come on prior to the incident on Aug 9, 2025. Hyundai insited I contact the oil change mechanics as it was clearly a craftsmanship defect, not the fault of Hyundai parts or material. Hyundai provided photos showing the oil plug was still laying on the block. I visited Superior Auto (mechanics that did the previous oil change) and they also deny responsibility due to the fact that the car drove fine for 3,000 miles without any indication of oil leakage, so there is no proof of fault craftsmanship.

I have regular oil changes (every 3k mi) and every time I go get say there’s no or low oil. At the beginning of July my engine coil in column 3 failed and I had all four coils and spark plugs replaced. Since the replacement my engine is still consuming a quart of oil per week

I am submitting this formal safety complaint regarding my 2018 Hyundai Tucson. The vehicle has 101,900 miles and has been well maintained. Recently, it began experiencing severe performance issues, including difficulty accelerating and consuming oil at an abnormal rate. The dealership diagnosed the problem as a failed catalytic converter with an estimated repair cost of over $8,000. While Hyundai has an active recall on the engine for this model year, they have stated that my specific problem is not covered, despite the fact that the catalytic converter failure appears to be directly related to the engine defect. The oil consumption and acceleration issues raise serious safety concerns, as the vehicle can lose power unexpectedly while driving. I am a teacher, a parent, and have one child with special needs. I have no other form of transportation and am still making payments on a car I cannot safely drive. Hyundai’s refusal to address this issue as part of the known recall leaves me with an unsafe and inoperable vehicle through no fault of my own. I believe this matter warrants further investigation by the NHTSA, as it suggests that related component failures stemming from the defective engine are not being adequately addressed, leaving owners at financial and safety risk. I respectfully request that the NHTSA investigate whether Hyundai is failing to address a known defect’s full scope and to take appropriate action to ensure the safety and fair treatment of affected consumers. Thank you for your attention to this matter.