2018 Hyundai Sonata — Known Issues & Recalls

Your 2018 Hyundai Sonata's engine is consuming oil at an abnormal rate, leaving the oil level completely dry and triggering the oil pressure warning light on your dashboard. Low oil pressure can lead to engine damage or sudden engine failure while you're driving. The dealership noted this issue during a December 2025 service visit but did not repair it or provide clear information about recall status. Addressing this will likely involve an engine oil system inspection, possible internal engine repair or replacement, and verification of any applicable recalls.

Excessive Oil Burning and Oil Consumption. Oil turns black abnormally quickly (within the first 500-1000 miles) even though recommended Full-Synthetic Oil is used. Engine has intermittent rough idle once engine is warm.

The component involved is the engine (2.4L Theta II gasoline engine) in my 2018 Hyundai Sonata. The malfunction involves excessive internal engine oil consumption between oil changes. The vehicle consumes oil at an abnormal rate, requiring frequent top-offs to prevent low oil levels.

The oil pan is starting to crack, a small drip is now happening but dealership says it could spilt and cause the engine to seize while driving. The pan looks very flimsy compared to my Ford and Toyota.

While driving the vehicle, I repeatedly must check and put oil in. (On average once per week) I took the car to an auto shop where I was told that the engine was bad and I must get a new one. I kept driving, putting oil in as needed, then the car in the middle of driving started to shudder and the check engine light came on.

Engine oil consumption issues. My 2018 Hyundai Elantra falls within the dates of this issue. I had an oil consumption issue done and the dealership claimed it passed.

I bought this vehicle as a certified pre-owned from a Hyundai dealership on 09/10/2022 with 32,677 miles. Around 85,000 miles, it began burning an excessive amount of oil—about two quarts per month. Now, with approximately 101,000 miles, it still burns two quarts weekly, oil is being expelled from the muffler, and the exhaust has started to glow red.

Your engine has developed a serious internal problem that started with loud knocking when cold-starting and has progressively worsened. By early 2026, oil began visibly leaking from your exhaust pipe while the engine runs, indicating internal engine damage like worn piston rings or failed valve seals. This creates safety risks including potential loss of engine power while driving, engine seizure, and a fire hazard from oil in the hot exhaust system. Fixing this will likely require internal engine repair or replacement, which is a major job.

Your 2018 Sonata has broken down repeatedly every few months, requiring coil pack and spark plug replacements costing $300–$600 each time. You're also losing oil between oil changes and need to add about $20 of oil weekly. The repairs may involve replacing failing ignition coils, spark plugs, and investigating the engine for oil leaks or internal defects.

While driving on the highway, my 2018 Hyundai Sonata experienced sudden loss of engine power and became undrivable. The failure occurred without warning at approximately 86,500 miles. At the time of the incident, there were two children in the vehicle, and the breakdown occurred at night in cold temperatures (approximately 20°F).

The contact owns a 2018 Hyundai Sonata. The contact stated that while driving approximately 60 MPH, the vehicle started to vibrate roughly. The contact felt the vibration in the steering wheel.

The contact owns a 2018 Hyundai Sonata. The contact stated that while receiving an oil change, the technician advised that the oil level was very low. The contact stated that the low oil warning was intermittently illuminated.

The contact owns a 2018 Hyundai Sonata. The contact stated that while driving at an undisclosed speed, the low oil warning light illuminated. The vehicle was taken to the dealer, but was not diagnosed or repaired.

Your 2018 Sonata experienced multiple warning lights, abnormal engine noises, and repeated mechanical failures shortly after purchase despite low mileage. You noticed instability while driving and loss of power that made the vehicle unsafe to operate. These problems persisted even after repairs and maintenance, and ultimately contributed to a highway accident. Diagnosis and repair will likely require a full powertrain and electrical system inspection to identify the source of the warning lights and mechanical faults.

Unknown what system failed. The vehicle is at an impound lot and can be inspected on request. Police and fire department were on the scene.

The three airbags in the car (on the driver's weel, driver's knee, and the passenger's side) deployed while driving on a normal street at a speed of 50 miles/hour. This is an unexpected behavior of a car at a normal speed. I need help to fix this car and know what is the reason this happened.

I am Detective [XXX] #XXX with Austin Police Department Vehicular Homicide Unit and I worked a fatal crash [XXX]. The damage to the vehicle two vehicle should not have caused a death. The airbag became detached from the steering wheel and impaled into the drivers chest.

Intermittent no-crank, no-start condition. Dash lights illuminate, push-button start produces no response. Brake pedal applied.

To Whom It May Concern, My name is [XXX] , and I am formally escalating serious ongoing issues with my 2018 Hyundai Sonata. Despite repeated attempts to resolve these concerns through the dealership, my vehicle continues to experience excessive oil consumption, engine failures, and additional mechanical issues, all while under warranty. I am now seeking immediate corporate intervention.

Excessive oil consumption. I am routinely getting notifications of low oil about 1,000 miles before the oil change is due. When I bring it in for an oil change it is nearly empty.