2018 Hyundai Elantra Complaints

  • Engine 06/01/2026

    The engine in my 2018 Hyundai Elantra suffered a sudden internal failure at 118,444 miles. The vehicle began knocking, losing power, and running roughly. A dealership inspection confirmed heavy scoring on cylinders 1, 3, and 4, oil intrusion into the cylinders, and piston top slapping. The engine is not repairable and requires full replacement. This failure matches the known defect pattern of Hyundai’s Nu 2.0L MPI engine, which has widespread issues with piston ring wear, oil consumption, cylinder scoring, and internal mechanical failure. The failure occurred without warning/messages and created a safety hazard due to loss of power while driving. My VIN is not included in any recall, but the defect is identical to other Hyundai engine failures that have resulted in recalls and investigations. I am reporting this because the engine failure appears to be part of a larger safety‑related defect affecting this engine family.

  • Unknown Or Other, engine 06/09/2026

    My daughter was in a parking lot and put her car in park, removed her keys and exited the vehicle. She walked around the vehicle and was removing her school bag and the car came out of park and rolled into another vehicle.

  • Electrical System 06/10/2025

    Alarming rate of oil consumption causes sudden loss of power / acceleration which definitely increases probably of causing an accident. Local repair shop confirmed extremely low oil level with no evidence of where oil went shortly after oil change and annual safety inspection. All the dashboard warning lights came on when it happened but low oil warning light came on prior to event. No warning whatsoever, just sudden loss of power and completely lit up dashboard.

  • Engine 04/10/2026

    Engine has consumed an alarming rate of oil for years. I brought to a mechanic and they performed a $2,600 repair on engine. It ran fine for while and got much worse with oil consumption to the point that I needing to add oil monthly. It has been difficult to keep up on keeping enough oil in car and engine has now sustained damaged. There is no ticking or noise, but there is a loss of power and sometimes, the engine runs rough. I continue to drive it and add oil. But I have researched this is an apparent problem with the elantra.

  • Seats 05/16/2026

    The contact owns a 2018 Hyundai Elantra. The contact stated while the vehicle was parked, the contact stated that while entering the vehicle, the contact noticed an unusual burned spot on the back rest of the front passenger's seat. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 86,040.

View Complaints for Other Hyundai Elantra Years