2019 HYUNDAI SONATA Power Train Problems

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. I am reporting this defect so that the NHTSA can track the scope of the problem and determine whether a recall should be issued.

Failed Component: Engine - Burnt Valve/ Snapped Piston/ Piston Scrapping Internally; available for inspection - Risk of safety: Car sputters/jerks upon acceleration, takes a long time to gain speed, STALLS when slowing or stopping, may or not start after stalling, violently shakes while driving - Problem has been confirmed by Hyundai dealer/repair - Component has not been inspected by the manufacturer, police, insurance representative; only Hyundai repair - Warning lamp, messages, and symptom PRIOR to failure, NO, after the failure, YES; check engine light and all symptoms listed above; all appeared approximately September 15, 2024. Since the purchase of the vehicle in January 2024, I have made complaint regarding the performance of the vehicle. Have had multiple oil changes/fill ups within the last 7 months, due to excessive oil consumption. Vehicle has had scheduled maintenance, several diagnostics, and too many trips to the dealership/repair for a 5 year old vehicle,...

Car has a rod knock, has been looked at by a private mechanic, seen online there was a recall on Hyundai Sonatas for rod knock issues.

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. Now I have to bring it again today - Hyundai has not told me what the next step is other than I have to leave the car there all day - after they speak to tech support they will determine next steps. Most likely a combustion cleaning. Then I have to start the 1000 mile consumption tests again. I live 35 mins from...

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. Hyundai refused to even do an oil consumption test, let alone repair/replace the engine. The “sludge” in the oil that Hyundai states was present is a result of the oil consumption (even the dealer service department verbally agreed). I’m literally putting new...

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. The second time the transmission was replaced, the service manager told me they found metal fragments in the transmission fluid. I don't know what problem this defect will cause later on. If you would like to inspect my car to determine if this is dangerous, I can make it available. Thanks! P.S. - Below, I have to...