2018 HYUNDAI SANTA FE SPORT Complaints

engine consumes excessive amounts of oil. we have to check oil every day and add oil even after 30 mile trips. low oil can result in a seized engine which could result in a crash if power is lost in high traffic areas or highway speeds. hyundai knows there is an issue and engines that seize are replaced with the same defective design. this is dangerous and could result in a crash or being stranded in an unsafe area

My starter failed while out shopping. No issues starting the car departing from my home, but would not start in the store parking lot. My mechanic did not provide the broken part for inspection however everyone commented that is was very unusual for it to fail as I only have roughly 25,000 miles on it. My mechanic also mentioned that this was 2nd 2018 hyundai sante fe in the past week he had to replace the starter on that vehicle had 60,000 miles. There were no warning lights prior to the event, I suspected it was the starter after having a new battery installed and no success starting because of the lights that remained on on the instrument panel.

My vehicle has approximately 152,000 miles, and I am currently experiencing a major engine failure. Oil consumption and knocking on engine Hyundai has had lawsuits in the past with unsafe unreliable engines.

Engine is burning oil as a default in manufacturing of engine, leaving little to know oil in the engine and causing other malfunctions that use the oil

The contact owns a 2018 Hyundai Santa Fe Sport. The contact stated that the headlights suddenly illuminated without the vehicle being turned on, causing the battery to be drained. The contact recharged the battery to start the vehicle. The contact stated that the light switch failed to turn off the high beam headlights; however, the headlights and the indicators were no longer illuminated. The vehicle was towed to the dealer, who stated that the junction block had failed and needed to be replaced; however, the contact was not sure of the cause of the failure and needed to repair the vehicle. The dealer diagnosed the vehicle that an interlock casing, fuse, and relay that had melted, and that the switches were not responding, but could not confirm what caused the failure. The contact learned that the vehicle was previously included in a recall for another junction box that had been repaired. The contact was unable to provide the recall campaign. The vehicle was not repaired. The manufacturer was informed of the failure and opened a case. The failure mileage was approximately 18,000.

The contact owns a 2018 Hyundai Santa Fe Sport. The contact stated that while driving at 25 MPH and approaching a stop, the vehicle stalled. The battery, check engine, and oil warning lights were illuminated. The contact stated that the failure was related to NHTSA Campaign Number: 22V810000 (Service Brakes, Hydraulic). The vehicle was towed to the local dealer, where an unknown diagnosis was provided. The vehicle was not repaired. The warranty claim was denied. The manufacturer was contacted, but no assistance was provided. The failure mileage was approximately 160,000.

The vehicle developed loud engine knocking and abnormal noise consistent with known Hyundai engine defects. The vehicle is unsafe to operate and has been retained at an authorized Hyundai dealership since October 25, 2025. Hyundai vehicles with similar engine failures have been documented to catch fire, including while parked. Despite the known defect pattern, the manufacturer is refusing warranty coverage, alleging lack of complete oil change records, without providing proof that maintenance caused the failure. This represents a serious safety risk to occupants and the public. My family includes a child with a motor disability, which significantly increases the danger in the event of fire or engine failure.

I have been experiencing issues with oil consumption, having to get oil changes every 2 months and sometimes monthly with no reported leaks from 2 different mechanics. I have been very high maintenance over my oil. While I was driving on the highway, my vehicle began to shake and a knocking sound was heard. I felt the vehicle begin to jerk but no warning lights were on. I was no longer able to drive and had to pull over and wait for a tow to my mechanic's garage. The mechanic let me know there was an issue with the engine, specifically the 3rd cylinder and the piston. It does not put out as much pressure as it is supposed to. I brought the vehicle to the dealership after and they confirmed this was an issue and quoted me $8700 in repairs. There were no warning lights and no engine lights prior to this happening. I was informed by my mechanic that this is a known issue with Hyundai in their 2018 models having failing engines. I purchased the vehicle certified pre-owned with a guarantee from the dealership that I was purchasing a reliable vehicle that should have no issues of this degree.

Engine burns prodigious amounts of oil. Uses one quart in about 400 miles. Hyundai verified this with their 1000 mile oil consumption test. The only reason that this engine did not spin the crankshaft bearings from running dry on oil is because I was so diligent in filling the crankcase. A service writer at Happy Hyundai said that I needed a new long block, but the dealership refused because I had 103,000 miles on the engine. They knew about the problems with oil burning on Theta engines, but were happy to send me on my way knowing that I would be putting oil in my car often. This is not acceptable. Can you help me?

This engine is burning oil. Its mixing oil with gasoline in the cylinders. Its fouling spark plugs and consuming large amounts of oil with absolutely no visible oil leaks. The exhaust is black. PCV valve is clean. Engine is misfiring due to spark plug fouling. New spark plugs and coils. Multiple dealers have stated this is a KNOWN defect with this particular GDI engine but Hyundai refuses to issue a recall.