2018 Hyundai Tucson

This vehicle had a engine replaced by the dealership Nov 2024.Has not run the same since.Getting worse and seems like transmission issues.I was told The first and the 2nd owner which I'm the 2nd owner has a 5 year 100,000 mile warranty.It's been 4 years and since I've had the vehicle I've driven round off 60,OOO miles .The vehicle had $84,000 something miles on it when I got it.It's becoming very dangerous to drive around other cars giving out of power in the middle of streets and barely not going up hills or freeways and streets.😮

UNKNOWN -A catalytic converter clogged after being installed - only 14 months following installation, causing rough and unsafe acceleration, inability to shift gears properly, and need to drive with hazards on. It is clear that there is an issue with the engine/exhaust and system in this vehicle. Additionally, the car needs oil added regularly and seems to be burning it, as indicated by low level.

Approximately one month ago I had a high pressure fuel pump installed in my 2018 Hyundai Tucson. While driving on the highway, about ten minutes from home, my car suddenly burst into flames. There were no warning lights in the cockpit. There was no smoke in the cabin. Another motorist flagged me down. I got out of the vehicle just in time for it to become fully engulfed in flame. It burned down on the highway. Police and fire responded. Insurance is investigating. If I was inside the vehicle, I would have certainly died.

Van Hyundai Dealership in Carrollton, TX has confirmed excessive oil consumption causing catalytic converter failure that results in the engine stalling and unable to accelerate. We’ve already replaced the catalytic converter once in 2024 because it was full of oil and causing engine failure. Less than a year later (less than 10,500 miles) the same problem was reproduced. The dealership refuses to replace our engine due to the engine defect. This problem directly impacts the engines ability to perform, unable to accelerate on the interstate, and engine stalling which directly impacts our safety and puts our family into a life threatening situation when the engine fails on the highway. The engine has a defect that Hyundai refuses to address. There are no warnings or engine lights that appear beforehand which is extremely concerning and a liability. Hyundai motor company is corrupt. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

I took my car in for a daily oil change and inspection, where I learned that there was no oil is in my car after coming in 5k miles before as I have been religious about oil changes. I came in on Saturday September 20th for an inspection and was topped off with 3 quarts of oil but am now back in the shop Monday September 22nd to test the oil. The oil that was checked came out Black.

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.

Evidence package for dealer fraud: demand letter, SMS threats, sales contract, diagnostic report. Catalytic converter failure caused by chronic oil overfill (2+ quarts excess). Symptoms: - Loud whistling noise from exhaust - Severe power loss (unable to reach 60 mph) - Check engine light activation (codes P0011/P000A) Safety risks: 1. Stalling hazard at highway speeds 2. Fire risk from clogged converter 3. Engine seizure due to oil contamination Confirmed by Hyundai dealer (Evansville, IN) on [XXX] - ONE DAY AFTER PURCHASE. Defect existed pre-sale: - Dealer admitted exhaust issue in writing: "probably will be in the exhaust" - Formal demand letter documented hidden defects on 04/28/2025 - Vehicle returned to dealer on 04/24/2025 where it remains Evidence confirms fraud: - Diagnostic report shows pre-existing conditions - Dealer demanded $300 to release vehicle, then $900 for repairs - "As-is" claim invalid due to defect concealment Warning signs appeared immediately post-purchase. Vehicle available for inspection. Legal violations: - Clean Air Act (emissions warranty breach) - KRS 367.110 (deceptive acts) - FTC Used Car Rule (undisclosed defects) INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)