2019 Hyundai Sonata Transmission and drivetrain Problems

“Starting in July 2023 I have noticed that the oil consumption for my car is racing through the engine. I barely make it 1000 miles before the oil is completely gone. After 2 local oil changes - I decided to take it to the Hyundai dealer where I purchased the car. This was in October - I have brought my car in 4 times for 1000 mile oil consumption tests. I had to add an additional visit due to the fact that Hyundai changed the testing standards. …”

“The transmission in my vehicle makes a whine when shifting at about 35-40 miles per hour. No other car I ever drove made that noise. Hyundai has replaced the transmission 3 times and they still could not fix it. After the third replacement they said it's normal and that other Sonatas make that noise. That cannot be true. They did not replace the transmission 3 times if that noise is normal. If it IS true and other Sonatas make that noise, there may be a defect that will turn dangerous in other Sonatas. …”

“I purchased a 2019 Hyundai Sonata SE in December 2024. Within one month, the vehicle consumed 3.5 quarts of oil out of a 5-quart capacity. After researching the issue, I discovered that this is a known engine defect covered under Hyundai Technical Service Bulletin 23-EM-008H, which relates to excessive oil consumption. This condition can lead to engine failure, posing a significant safety risk if the engine fails while driving at high speeds or in traffic. This issue is part of an active class-action lawsuit and has affected numerous vehicles with the same engine type. …”

“Car consumes excessive oil – one quart about every 500-700 miles. This has caused sludge in the engine and the car hesitates significantly on starting from a stopped position and now hesitates even at highway speeds. This has become a definite safety issue. If the car stalls it is only a matter of time before I am hit by another driver. The dealer first stated the oil consumption was fine IF it was one quart every 1,000 miles and that no repairs would be needed. My car is consuming almost double that amount of oil. Dealership agreed to look at it; stated the car needs a new engine. …”

“For the past several years, this vehicle has experienced a recurring and unresolved engine malfunction that creates a safety hazard. The problem manifests as follows: Symptoms when check engine light illuminates: • Idle RPM elevation to approximately 1500 RPM (normal idle: 800 RPM) • Sudden unintended forward acceleration when foot is removed from brake pedal • Significantly reduced acceleration performance during normal driving • Vehicle becomes difficult to control safely The malfunction occurs intermittently but follows a consistent pattern. …”