The contact owns a 2016 Hyundai Sonata. The contact stated while driving at various speeds, the vehicle shuddered significantly. The contact stated that the vehicle stopped shuddering while shifted into neutral(N). Additionally, the contact stated that while driving and depressing the accelerator pedal, the failure recurred, and the vehicle jerked significantly. The low oil pressure warning light and the check engine warning light were illuminated. The vehicle was taken to an independent mechanic, where four ignition coils and four spark plugs were replaced; however, the failure recurred four months later. The vehicle was taken to the dealer, where the spark plugs were replaced and a fuel induction cleaning service was performed; however, the failure persisted. The contact stated while driving 5 MPH, the vehicle stalled. The vehicle was jumpstarted. The vehicle was taken to the dealer, where it was diagnosed that there was oil intrusion in the combustion chamber, and the spark plugs were fouled. The dealer determined that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure, but no assistance was provided. The failure mileage was approximately 95,050.

- Clemson, SC, USA

The contact owns a 2016 Hyundai Sonata. The contact stated while driving approximately 30 MPH, the vehicle started to make an abnormal knocking noise. The contact stated no warning light was illuminated. The contact pulled the vehicle over and stopped. The contact turned the vehicle off and on. The contact stated that she was able to shift into drive (D) and while depressing the accelerator pedal the abnormal knocking sound was heard. The contact stopped and had the vehicle towed to an independent mechanic. The vehicle was diagnosed, and it was determined that the engine had thrown a rod due to lack of engine oil and the lower part of the engine needed to be replaced. The contact stated that she had had the oil changed two weeks prior to the failure. The contact stated that she had not noticed any oil stains on the driveway at her residence prior to the failure. The vehicle was not repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 70,000.

- Joplin, MO, USA

The contact owns a 2016 Hyundai Sonata. The contact stated that while operating the vehicle, the check engine warning light remained illuminated. The vehicle also experienced reduced power and would not properly accelerate. The vehicle was taken to a local mechanic who determined that the engine had experienced excessive oil consumption. The vehicle was later taken to the local dealer who performed an oil consumption test and determined that the engine was faulty and needed to be replaced. The vehicle was not yet repaired. The manufacturer was notified of the failure, but no assistance was offered. The failure mileage was 78,000.

- Greenbelt, MD, USA

The contact owns a 2016 Hyundai Sonata. The contact discovered that the engine was consuming and excessive amount of engine oil. There was no warning light illuminated. The contact stated that she frequently checked and added oil whenever the oil level was low. The dealer was notified, and the contact was informed that an oil change was needed. After the oil change, the contact was advised to take the vehicle back to the dealer every 1,000 miles to check the oil level to determine if the engine needed to be replaced. The manufacturer was notified of the issue and a case was filed. The vehicle was not repaired. The failure mileage was 63,300.

- Trumbull, CT, USA