2019 Hyundai Sonata Engine Problems

Your car started shuddering while driving without any warning lights, then minutes later displayed "Check Hybrid System" and "Turn Engine Off" messages on the dashboard. The dealer diagnosed complete engine failure requiring a full engine replacement at 32,000 miles. Even with maintenance records showing regular oil changes, the manufacturer denied coverage under warranty and the vehicle remained unrepaired.

Your engine started making a knocking sound from under the hood while driving, and you noticed it was burning through oil much faster than normal. When you tried to drive, the car wouldn't go faster than 5 MPH and the check engine light came on. A dealer found a blown piston and cylinder failure in cylinder #2, which was repaired but happened again. Later, black smoke came from under the hood with unusual engine noise, and a mechanic diagnosed that your catalytic converter needed replacement. Fixing this will likely require engine repair or replacement of the damaged piston and cylinder, along with catalytic converter replacement.

Your engine is losing excessive amounts of oil between oil changes and has metal shavings appearing in the oil, which suggests internal engine wear or damage. You've taken the car to the dealer seven times, and they've only added oil and run diagnostic tests that failed, without attempting a repair or engine replacement. Your extended warranty covers this specific issue, but you haven't been able to get the warranty company or Hyundai corporate to authorize the necessary repair.

Your engine is consuming about 1 quart of oil every 700 miles, requiring you to check and top off the oil roughly every 10 days. If you skip oil checks, the low oil warning light will appear on your dashboard. This excessive oil consumption suggests an internal engine problem that may need professional diagnosis and repair.

Your engine is consuming oil much faster than normal — you're losing about 2.5 quarts every week even though you just added 5 quarts. Hyundai's diagnostic process requires you to pay $90 for an oil consumption test, then return after 1,000 miles for a $600 oil system cleaning, and return again to check if the engine needs replacement. You believe this indicates a serious safety problem that should be addressed for all affected Hyundai owners.

Your car is burning through oil much faster than normal, requiring an oil change every 10 days instead of the normal interval. After just 1,000 miles following an oil change, the dealer recommended a combustion cleaning, but the problem continued and your check engine light came on. Both the dealer and an independent mechanic diagnosed that your catalytic converter needs to be replaced, though the repair hasn't been completed yet and Hyundai declined to cover it under warranty.

Your engine was replaced under warranty due to excessive oil consumption, followed by a new battery installation. Shortly after the battery replacement, you've experienced multiple instances of burning smells and visible smoke from under the hood, though the dealer has been unable to identify the cause during inspections. The smoking and burning smell episodes continue to recur intermittently. The dealer will need to perform a thorough diagnostic inspection of the engine bay, focusing on electrical connections, fluid leaks, and engine components that may be causing overheating or burning.

Your oil warning light came on at 4,700 miles, and when you checked, the dipstick showed no oil. A few days later, your check engine light came on and the car went into limp mode. The dealership performed multiple oil consumption tests—the first passed when they overfilled the oil, but the second failed when they didn't overfill it. They initially told you the engine might need replacement and that it could fail at any time, but later denied coverage and refused to perform further diagnostics without an additional $800 fee. Hyundai corporate also denied coverage under what you believed was an extended warranty. Resolving this will likely require escalating the warranty claim with Hyundai corporate or seeking legal advice about the coverage dispute.

Your engine's valve cover gasket was replaced by the dealer, but engine oil smell is still entering your cabin and causing health symptoms including chest pain, headaches, dizziness, and nausea. The gasket replacement may not have solved the underlying oil leak. The dealer may need to re-inspect the valve cover gasket installation or check for other sources of the oil leak.

Your 2019 Sonata's engine has developed a failed piston ring that requires replacement. Hyundai is denying your warranty claim because the car exceeded 60,000 miles before you purchased it, even though you're still within the 5-year warranty period. The dealer estimates $2,750 in preparatory work plus $7,111 for a new engine, but Hyundai won't cover the engine replacement due to the mileage limit on the warranty. The fix would involve either replacing the piston ring and engine components, or obtaining engine replacement coverage through warranty or legal action.

Your engine is burning through oil much faster than normal — about a liter every 1,000 miles. This means you'll need to top up your oil frequently between services. The dealership has declined to address the issue under warranty. You may need valve stem seals or piston rings replaced to stop the excessive oil consumption.

Your engine is burning oil, which means oil is being consumed during normal operation rather than just leaking out. You may notice the oil level dropping between service intervals and a possible burning smell. This typically requires diagnosing the source — which could be worn piston rings, valve seals, or other internal engine wear — and may need engine repairs or component replacement.

Your engine is consuming oil much faster than normal, causing oil levels to drop dangerously low without warning from the dashboard. Oil is leaking into the combustion chamber due to a piston ring design flaw, which damages your spark plugs and can lead to engine failure. The owner experienced complete engine failure at 134,000 miles with no warning lights beforehand. Fixing this will require replacing the piston rings and likely rebuilding or replacing the engine.

Your engine is burning through oil faster than normal, which means you'll need to check and top off your oil more frequently than usual. This could indicate worn internal engine seals or rings that are allowing oil to enter the combustion chamber. The fix will likely involve an engine inspection to identify the source of the oil loss, and may require replacing worn seals, rings, or gaskets.

I just had an Oil change twice on this car it burns oil like crazy..mine you only had car for5 months

I took my car to the garage after purchase around 75,000 miles due to rattling noise 8n the front and the amount of oil that my car was requiring in between oil changes, did the oil consumption test it came back on the higher range but Hyundai offered no resolution

Burning oil four quarts in between normal oil changes

I am writing to file a formal complaint against Hyundai Motor America and the Freehold Hyundai dealership located in New Jersey, regarding the ongoing engine oil consumption issues in my Hyundai Sonata. I purchased a 2019 Hyundai Sonata and its now 90,000 miles, I began noticing extreme oil loss, far more than a quart per thousand miles, with no visible leaks, no smoke, and no warning lights. I brought the vehicle to Freehold Hyundai for an evaluation, and they performed an oil consumption test, confirming the issue. They submitted a goodwill repair request to Hyundai Corporate, which was denied solely on the basis that I am the second owner, and the powertrain warranty does not transfer. The dealership offered a $200 PCV valve replacement (a part that costs $6–$20), but even their staff said it likely won’t resolve the issue. Their proposed solution is a full engine replacement costing $8,000 or more, which I cannot afford. I believe this is part of a broader manufacturing defect, and Hyundai should take accountability for the engine failure, especially considering similar complaints from Sonata and Elantra owners nationwide. TSBs (Technical Service Bulletins) have been issued on related issues. A car engine should not fail before 100,000 miles under normal use, regardless of ownership transfer. This issue has been the subject of TSB 20-01-004H, which addresses excessive oil consumption due to piston ring Hyundai’s refusal to provide any real assistance or remedy — and the dismissive conduct by dealership management — has left me feeling discriminated against, frustrated, and financially trapped. I request the BBB’s help in facilitating a fair resolution, either through: A warranty repair or subsidized engine repair Coverage under goodwill or defect-related remedy Reimbursement or alternative assistance Please find all supporting documentation attached, including my Hyundai case number dealer correspondence, and oil test results.

The contact owns a 2019 Hyundai Sonata. The contact stated that within the 4-5 months of vehicle ownership, the vehicle experienced excessive oil consumption. The contact stated that oil had been added to the vehicle approximately 8-9 times and an oil change had been completed twice. The contact stated while driving at various speeds, there was an abnormal rattling sound coming from the front of the vehicle. The check engine warning light was illuminated intermittently. The vehicle was taken to the dealer to be diagnosed, but the cause of the failure could not be determined. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 81,000.

Car drinks oil and doesn’t make it to the next oil change.

I am filing a formal safety complaint regarding excessive engine oil consumption in my 2019 Hyundai Sonata. The vehicle, with approximately 90,000 miles, experienced a complete loss of engine oil without any visible leaks. The low oil warning light appeared intermittently and ultimately revealed the oil level had dropped to zero, posing a severe risk of engine seizure and potential accident. This issue appears to be consistent with known problems related to the 2.4L GDI engines used in Hyundai vehicles from this period. Hyundai has issued TSB 20-01-002H, acknowledging excessive oil consumption in certain models. Yet, many affected vehicles, including mine, may fall outside warranty despite being within a reasonable usage period. I am requesting that NHTSA review the extent of this issue and consider whether a formal investigation, recall, or manufacturer enforcement action is appropriate. This engine defect presents a clear safety hazard, especially if failure occurs during highway driving. Thank you for your attention to this matter.

Is anything being done about the known oil consumption issues with the 2019 Sonatas? My daughter bought the car used -- it currently has 70,000 -- but Hyundai won't do anything because she is the second owner and those cars don't get 100,000 protection, they only get 60,000. It just doesn't seem right.

Car has 39,495 miles. First owner of vehicle. Have advised dealership since 2024 that there was a oil issue as i have only went to them for oil changes. I advised that as they can see the car is barely driven and the oil is disappearing. They claimed nothing was wrong and made me pay for a oil change again. Come this year, I advise again there is a issue, they tried to have me pay for a oil change again and I advised something else needs done. They argued I was not the first owner and the car was not in warranty however I bought the car from their lot and I am the original owner. Then they stated I had to pay for another oil change for the oil consumption. Then they claimed they would just do the oil consumption and then to drive 1,000 miles and bring it back. After the oil consumption engine light is on. I drove 1,000 miles, brought it back and the engine failed the test. The dealership changed the engine. 5 days later engine light is on, car is stalling and brake locked up, then car would not start and was smoking under the hood. Car was then towed to the dealership. They claimed nothing is wrong and they reset the code for the engine light to go away. They stated evap code was on but was not persistent so it's fine. Few days later engine light comes on again and once the car has been running, you shut it off go to start it again it won't start unless you have it sit for a while. I Take it back to the dealership they point next to the engine saying a purge valve, but the wants money for a diagnostic. They do the diagnostic and still provide maybes, as they claim the filler neck is rusted and corrosion. I take the car to another place who states the filler neck is fine.

I have had issues with oil consumption in this vehicle for about 2 years. I have taken it to the dealership Vandergriff Hyundai in arlington, tx advising the oil light keeps coming on before oil change is due this was before my warranty had expired on my vehicle. I was told that they could not find anything wrong and a oil change was completed, but no oil consumption test was done. I asked about any recall for knock sensor and i was advised that had already been completed. I have no proof of this being completed. 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 had my oil changed on April 26th, 2025 and as of June 24, 2025 it was 3 quartz low. this is not normal and it is dangerous.

Rod clearance test

Bought 2019 at Priority Hyundai in Chesapeake va in JUNE of 2022. Noticed that car stay burning oil in march of 2025. Took 2 oil consumption test at dealership and failed both. Hyundai knows these consume oil even with proper maintenance but will do nothing to try to make it right. Basically got turned down and service advisor ADVISED me to buy a new vehicle. The car only has 75,330 miles on it

The car stalled and came to a stop on the highway which was very dangerous. Took it to mechanic and they found the cylinder 3 and 4 misfire and suggested we take it to hyundai dealer for repair. Took it to hyundai dealer and they did a compression test and found only 40% compression in cylinder 4. All cylinders should be around 180%. Engine needs to be replaced and hyundai refuses to help.

The contact owns a 2019 Hyundai Sonata. The contact stated that the vehicle was consuming an excessive amount of engine oil. There was an abnormal knocking sound while depressing the accelerator pedal. The contact had to add oil to the engine after an oil change. The oil level had been low by one quart, three quarts, or even more on several occasions. There were no warning lights illuminated. The vehicle was taken to the local dealer, where it was diagnosed that there was oil leaking from the gaskets. There was an internal leak in the engine. The dealer informed the contact about an oil consumption test. The dealer informed the contact about the associated fees. The vehicle was not repaired. The manufacturer was not contacted. The failure mileage was approximately 89,000.

I have had issues with oil consumption in this vehicle for about 4 years. I started getting a "Knock Sensor" code. I replaced the knock sensor and still had problems. Hyundai had a recall and they reprogrammed my computer board. A year later I was having the same issues. My car started stalling out. Took back to the dealership they said my engine had sludge and now they're saying that there is a hole in my engine. Hyundai is saying that I don't qualify for assistance.

My Hyundai is having oil consumption issues, Hyundai isn't stepping up and won't pay for my consumption test saying it's out of warranty, it's a 2019 with only 69895 miles on it. We are the second owner and there's been no maintenance done on this car for the year that we've owned it. We have all the oil change records and although we didn't start until January to regularly record the oil we were needing to put in we only get about 600 miles before we need to had 3/4 to 1 full quart. I know this is an issue that's been happening to numerous Hyundai owners and I'm reaching out as I feel something more needs to be done. I have a 2013 Sonata that had a recall on it and I got a full engine replacement on that at 135,000 miles. Is NHTSA looking at recognizing this as something that Hyundai needs to take ownership of? I apologize for rambling, but this is so frustrating. Thank you for your time, [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Car started consuming large amount of oil at 80,000 miles, no leaks or drips under the car or on any of the under panels. I am adding a quart of oil every 1000 miles.

The part in question is the oil pan. An oil leak was identified at the place where I get my oil changed. The service center at the dealership informed me that there was a crack in the oil pan due to overtightening of the drain plug. I am not sure how they made that connection. The risk of this oil leak could lead to engine failure if oil levels drop below a certain level. There were no warning lights or messages from the car about the oil leak.

What component or system failed or malfunctioned, and is it available for inspection upon request? Since april 2025 i’ve been having low oil readings in my vehicle despite regular oil changes I took it into the dealer since my vehicle was still under warranty, which they stated only one part was under warranty. I had to pay $800 after this was replaced. I started having engine light come on. This engine light when I paid a diagnostic fee I learned that the cylinder three was misfiring. It was suggested that I have an oil change and get the oil level checked again within a week. This was done and it was determined that it was burning too much oil. I submitted this to the insurance and was told that this was not covered that there must be another reason why this was not working the way it should. 3 weeks ago Then I was asked to replace the spark plugs and coils. These were replaced for an additional cost of approximately $300. After replacing this, the check engine light gave the same condition of third cylinder damage.. And the oil level continue to decrease The vehicle was left with the dealer for approximately 10 days. They stated that the engine needed to be cleaned due to possible carbon buildup for about $800 then they stated that the spark plugs and coils needed to be replaced with a specific brand and not the type that Was previously used. Then my vehicle was returned to me, performing sluggishly with the check engine light returning with the same condition of third cylinder misfire. An inspection is available. How was your safety put at risk? The possibility engine failure away from hom Has the problem been reproduced or confirmed by a dealer or independent service center? Yes twice Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? No Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? Yes frequently over the last 2 months

I started the car and smoke came from the engine compartment I didnt think anything of it but the smoke keep getting worse . So I pulled over and open the hood to find fire come from on top of the Engine the flames got higher so I asked an local restaurant for an fire extinguisher I put it but know these cars this could of been an big problem if I had parked in the garage or park next to other cars or even if I keep driving . It would of not been good! By this time the Shelby Twp. fire dept showed up and sprayed more water on it.

In April of 2024 initially the car was under warranty. I took my vehicle to the Edmond Hyundai dealership to see why I kept having to put oil in the car in between oil changes. The dealership said iI needed an oil consumption test to determine if the loss of oil amount was excessive. They changed the oil and i drove it 1000 miles and returned it to the dealership. They said it was was around 1 quart low, which is acceptable and "normal". This isn't normal. I tried to get them to check the engine again and do other tests but they wouldn't. It is now October of 24' and I am still putting oil in between oil changes because the light comes on. I took the car back to the dealership on 10/19 and they said the only thing they could do is another consumption test to determine if the oil loss is excessive. I asked them to do a more thorough check of the engine and cited the previous time I brought the car in for the same issue that was not resolved. The mileage is now just over the warranty threshold, but they are still wanting me to pay for whatever service needs to be done to the vehicle, whether it's a combustion cleaning or a new engine. The safety of the car is of concern now and since this car is driven by the three drivers in the family, I do not want them put at a risk on the road if something fails because of oil loss and engine seize. Hyundai needs to be held accountable and honor warranty, safety, and service. The dealers need to help the customer and go above and beyond. The staff at Edmond Hyundai kept going back to the consumption test and all the steps they need to follow before they could send in a submission for doing a combustion cleaning when clearly there was an issue. I am beyond frustrated with the lack of concern for safety and customer satisfaction.

The contact owns a 2019 Hyundai Sonata. The contact stated that after the vehicle was purchased, the vehicle was taken for an oil change. The contact stated that the very next day he checked the dipstick and became aware that there was no oil on the dipstick. There was no warning light illuminated. The dealer was called, and the contact was informed that there might be an oil consumption failure with the vehicle. The vehicle was taken to the dealer for an oil consumption test; however, the contact stated that he was not able to pay for the oil consumption test to be performed. The contact stated that the vehicle was not yet diagnosed or repaired. The manufacturer was notified of the failure. The failure mileage was 118,000.

See attached document for complaint.

Engine has been leaking oil for awhile. After close inspection i discovered a tiny crack in oil pan. There is no damage whatsoever to the oil pan. After much research online it appears many other hyundai owners have the same leak from a crack in oil pan in exact same spot. If left unchecked it would result in engine damage from low oil level. There is a spot weld for drain plug backing and the crack develops at this spot weld. No damage or impact has caused this crack as other owners experience same issue. Oil pan had to be replaced as leak was getting worse at crack

The contact owns a 2019 Hyundai Sonata. The contact stated that the vehicle was consuming an excessive amount of engine oil. The oil warning light was occasionally illuminated. The contact added a quart of oil, but the oil level failed to register on the dipstick. The contact stated that the vehicle was two quarts low in approximately 5,000 miles. The vehicle was taken to the local dealer, who competed an oil change and informed the contact to bring the vehicle back within 1,000 miles. The mechanic informed the contact that the vehicle was meeting the specifications for the oil requirements. The manufacturer was not contacted. The failure mileage was approximately 56,000.

I have noticed a great amount of oil usage here in the past 2 months, I have been having my oil changed every 4,500 miles for the last 4 years. After having it changed 6 weeks ago I was coming home from work and my oil light came on so when I got up the next morning I went out and checked the level of my oil and it was barely any oil in my car, so I immediately added the oil I needed to fill what was needed . I then started to monitor my oil levels and it seems that my car was using about a quart to a quart and a half every 6-7 days, I took my car to the mechanic shop and they told me return my back to the dealer because they have been seeing at least 3-4 Hyundia's weekly come in with the same problems. So today as I was coming home from work I tried to accelerate and my car just started sputtering and slowing down so I had to gradually accelerate while noticing my engine light flashing, so I had to drive 30mph in order to get to auto parts store to get the code read for the engine light and the guy told me that he also has seen a few these same codes on the Hyundia's lately. I think this really needs to be addressed immediately and put on the recall list , because this is a serious problem because my car stalling in the middle of the highway is not safe and causing people some real life head aches and serious out of pocket money that we don't have , so now my engine has completely shut down and I don't have a second vehicle and i have to get my car to the dealer tomorrow to see what can be done. Safety and taking ownership of the problem should be #1 priority .

The check hybrid system malfunction light and the blind spot detection came on january 13 2024 for the forth time towed to dealship they attempted repair then again same issue for the fifth March 23 2024 and the last time was today June 7 2024 was towed in.

The contact owns a 2019 Hyundai Sonata. The contact stated that the engine was consuming an excessive amount of engine oil. The contact stated that the check oil warning light was illuminated. The contact stated that the vehicle was consuming 4-quarts of engine oil per week. The contact stated that the dealer and the manufacturer were notified of the failure, but neither offered any assistance. The vehicle was not repaired. The failure mileage was approximately 45,000.

The contact owns a 2019 Hyundai Sonata. The contact stated that the vehicle would not immediately start. After finally starting the vehicle the check engine light remained illuminated. The vehicle was taken to the local dealer who diagnosed that the engine gasket was faulty causing oil to leak from the engine. The engine gasket was replaced and the failure was remedied. The manufacturer was not notified of the failure. The failure mileage was 23,000.

Less than 70,000 miles and engine is loosing oil

The contact owns a 2019 Hyundai Sonata. The contact stated that while parked and powered off, the vehicle was being refueled and connected to the fuel pump when she observed smoke coming from vents and from the engine compartment. The contact opened the hood of the vehicle and she observed fire emanating from the engine compartment. The gas station attendant extinguished the fire with an extinguisher. A police report was filed. The fire department was not called. The vehicle was towed to a dealer but was not diagnosed or repaired. The manufacturer was notified of the failure. The failure mileage was approximately 125,000.

Engine oil consumption failure. My car would not even make it to the 3,000 mile oil change without the low oil warning light coming on. Brought it to D'Arcy Hyundai in Joliet, IL for the consumption test..after 1,000 miles my car was down 2 quarts! They then did a combustion chamber cleaning. This cleaning made it so my car lags as it's driving and wouldn't shift properly and before it even left the dealership, the starter went out. Brought it back and they claim that after 1,000 miles the oil reads FULL, not any oil used whatsoever-which isn't possible. They are now denying fixing the engine. I am furious and when I get stuck again due to the oil consumption issue, they will make me start all over again and it may not be covered due to being over the mileage shortly. (I have about 2,000 miles left of my warranty) My sister has a Kia and the same garbage was pulled with her vehicle! She also had issues after the combustion cleaning costing her a starter, battery and alternator. HYUNDAI and EVERY DEALERSHIP knows this issued exists and the recall should be made immediately without all of this garbage.

The contact owned a 2019 Hyundai Sonata. The contact stated that while stopped at a red light, smoke was present coming from the hood and a burning oil odor was present inside the cabin of the vehicle. Moments later while driving, flames were seen coming from under the hood before the vehicle stalled. After exiting the vehicle, the front of the vehicle burst into flames. The local fire department was called to the scene and extinguished the fire. The vehicle was destroyed and later towed away. The cause of the failure was not yet determined. A fire report was taken at the scene. The manufacturer was notified of the failure. The local dealer was not contacted. The failure mileage was 60,000.

We keep getting an engine light every 2-3weeks. That sets the engine in a safe mode (limp mode). The code comes up Knock sensor overheat. Tho inspecting the engine we have notice in that time frame the car is low 1-2qts oil. Once the oil has either been replaced or added to and code reset it drives normal. Again until 2-3 weeks and bam. A course now we know to check our oil. After hours of research, we see no recalls for our car. Tho many years back that have had the exact same issue. The issues also came to light when car hit around 80k miles.

There is excessive oil consumption with the engine in my car. Hyundai says 1qt per 1000 miles is “acceptable” however this is not acceptable and can lead to catastrophic engine failure and oil slick on roadways if not caught in time. This is a know problem with Hyundai/Kia at this time. In many cases Hyundai/Kia owners are left with a “lemon” of a new car that is currently in warranty. Some have been granted replacement engines that have not lasted 3000 miles. A recall must be issued in the name of safety on these cars. The manufacturer must be held accountable for the lack of quality that has been put out over the last decade.

I bought this car 1 year and 2 months ago from a Hyundai dealership. The car was close to 73,000 miles. A few days after I got the car I started hearing this noise that sounded like a rattle coming from the front while accelerating to about 2,000 RPM. Due to my work, I went back to the dealer after 1,000 miles and explained to them about the noise and they duplicate it. The engine was consuming oil when I bought the car, I went back to the dealer and never did any testing on oil consumption. The problem got worst and worst. I started a claim with Hyundai Corp and I waited for 4 months to the an approval and they are only covering 50% of the engine. Dealer says I have to pay $3,200 to start engine replacement process, with no payment plan. Now I have a debt of $17k and no car. Engine has no compression on cylinder 3, which causes a misfire and makes the car unsafe to drive and leaves me unemployed with a child and bills to take care of. Thank you Hyundai, nice job .

After a year of issues, burning oil, changing spark plugs, my engine is dead. Hyundai has ignored issues and many times refused to pay for oil, parts, etc passing all costs to me. I have a loan of 15k and no car. Called and emailed their case management team—no help, no reimbursements. I have no equity-No property left. This was my only mode of transportation. Due to their slowness, I had to buy a new car and spend money I was not scheduled to spend. The financial stress and lack safety and unprofessional manner from Hyundai is at a new level-ridiculous.

The contact owns a 2019 Hyundai Sonata. The contact stated that while driving at approximately 70 MPH, the vehicle inadvertently revved and decelerated to 40 MPH while the accelerator pedal was depressed. The check engine warning light was illuminated. The vehicle was towed to the dealer where it was diagnosed that timing chain had failed and the engine needed to be replaced. The vehicle was repaired; however, the failure recurred. The contact stated that while driving at undisclosed speeds, the check engine warning light illuminated. The contact then stated that occasionally she needed to add engine oil between oil changes. The dealer was not notified of the failure. The vehicle was not repaired. The manufacturer was notified of the failure and a case number was provided. The failure mileage was approximately 220,000.

The contact owns a 2019 Hyundai Sonata. The contact stated that oil was leaking onto the ground from underneath the vehicle. The vehicle was taken to an independent mechanic and stated that the drain plug needed to be replaced. The drain plug was replaced but the failure recurred almost immediately. The vehicle was taken to the dealer and the contact was informed that the oil pan was fractured and needed to be replaced. The vehicle was not repaired. The manufacturer was contacted, and a case was filed. No additional assistance was provided. The failure mileage was 49,000.

2019 Sonata is using/burning oil at about a quart every 600-800 miles. We are checking and adding oil constantly. Car is sluggish, especially when accelerating from a stop.

I noticed the problem when my change oil light started coming on several thousands miles before my oil change was due. I checked the oil and it was very very low. Much lower that it should have been at that point during the maintenance period. We added oil thinking maybe something had happened with the previous oil change. Made it to the next round of maintenance and a few thousand miles into that one, same thing. Oil light came on again. Extremely low oil levels. I called the dealership where I had purchased the car - I am the original owner - and they requested me to bring it in for an oil consumption test. It was an immediate request. No other questions were asked. After the dealership kept my car for 2 1/2 weeks we get a call that the "valve" was full of "oil sludge" and were accused of "maintenance neglect", although we can produce records, and due to that Hyundai Corporate said our warranty would not cover it and repairs will not be covered. We would be held financially responsible for a brand new engine. I declined the repair as we cannot afford the repairs at this time and told the dealership we will continue to monitor oil levels.

A hairline crack from the engine oil drain plug causing leaking oil. This is a very common issue for this engine. Mine was present when the car was new. My local dealer claimed my car has run over something, which never happened. No dent or damages on the oil pan, just crack on the side of pan. This is very common issue for this engine. Low engine oil level will cause engine failure.

The engine is burning the oil faster than normal. There are no oil leaks. Called the dealership and they said it’s an oil consumption. I got an oil change March 3,2023 and my oil pressure light came on last Friday April 14,2023 as I was driving I pulled over and there was completely no oil in the car. The dealership told me to top it off until they can look it at. I topped it off Friday with two quarts of oil that I purchased from auto zone. I checked my oil again on Yesterday April 18,2023 and the two quarts of oil I put in was completely black

Well below the 5000-mile mark for an oil change, multiple times between multiple oil changes my oil light would come on. I would be at a stop light and the oil light would come on as soon as I start going again. Checked the oil when I got home and there was barely any oil on the stick. Found hundreds if not thousands of complaints about the engine burning oil very fast in multiple Hyundai's and Kia's for almost a 10-year span. This has yet to be recalled by Hyundai, this is a very dangerous situation that if it continues going unnoticed, could cause death or serious injury. It is a known issue at Hyundai dealerships, and they will fix it if it's still under the 100,000-mile warranty, but only if you bring it up to them. Hyundai/Kia has yet to fix the problem or do a recall that has been across multiple models for 10 years.

The engine is leaking oil in my garage. The car has 50,000 miles and is constantly loosing oil. It is 100% dealer maintained, and is current on all scheduled service.

4500 miles after an oil change the oil drain plug fell out and oil leaked out resulting in an engine stalling. An oil warning light came on 7 minutes before the vehicle stalled on the highway.

The dates are backwards because of the most serious incident which put my safety at risk. On October 3, 2022, while driving on a busy interstate, in rush hour traffic all of a sudden my car began to stall, there was a rattling/knocking sound emitting from the car, I lost power, could not accelerate and my check engine light began to flash. This leads me to believe it was an engine malfunction or failure involving the engine after viewing various ?online complaints. This was a safety risk not only to myself but to others because there is a posted speed limit that must be maintained on major highways. Other drivers began honking their horns, which added more fear to the anxiety I was already experiencing. In retrospect, had a car not realized I had slowed could have hit my car, which could have resulted in fatal injuries to my infant son and I. There was a recall service campaign update 953, which is related to the knock sensor detection system, which was performed on my car in February 2020. Furthermore, on October 1, 2022 while driving a red oil lamp began to flash on my car. I pulled over on the side of the road, called my personal mechanic who then informed me to get someone to bring oil before driving from the location. Once my friend brought the oil, it took 5 quarts before the light stopped blinking and I was able to drive home. The next day, I saw what appeared to be dark colored oil on ground where my car was parked overnight. Subsequently, I took the car to inspect the leak, because Hyundai informed me nothing would be covered because I was just outside of my 60,000 mile warranty. While at the mechanic it was found that I had an oil leak emitting from a crack in my oil pan. Again, my personal mechanic advised I take my car to the dealer, which I had the car towed on October 5, still waiting for a response on the status of my car(10/8/2022) from Hyundai while paying for a rental out of my own pocket.

EXHAUST TIP UNDER RIGHT REAR BUMPER EXTENDS PAST END OF BUMPER. A FEW WEEKS AGO SOMEONE BURNED THEIR LEG WHILE ACCESSING THE TRUNK. YESTERDAY, A SEPARATE PERSON WAS ALSO BURNED FROM SAME EXHAUST TIP FROM STANDING CLOSE TO BUMPER TO ACCESS THE TRUNK. WE HAD 2016 SONATA FOR 4 YEARS AND NEVER EXPERIENCED BURNS FROM SIMILAR EXHAUST TIP. CAR WAS PARKED ON LEVEL DRIVEWAY. CAR WAS WARMED UP FROM RECENT DRIVE AND TURNED OFF.

I PURCHASED A 2019 SONATA DEMO VEHICLE WITH 5,020 MILES IN JUNE 2019. I REMOVED THE TEMPORARY TAG AND REPLACED WITH PERMANENT TAG ON JULY 16. ON JULY 20, WHILE DRIVING ON THE EXPRESSWAY AT APPROXIMATELY 65MPH, THE ENGINE OVERHEATING ALERT CAME ON AND THE TEMPERATURE GAUGE WAS ON HOT. I PULLED OVER ON THE SIDE OF THE EXPRESSWAY AND WAITED FOR HOURS (IN NEARLY 100 DEGREE SUMMER HEAT) TO HAVE A NEW VEHICLE TOWED TO THE DEALERSHIP. THE SERVICE DEPARTMENT ADVISED ME THAT THE WATER PUMP MALFUNCTIONED AND CAUSED THE BELT TO TEAR. THE SERVICE DEPARTMENT COULD NOT PROVIDE A REASON FOR WHY THE WATER PUMP/BELT MALFUNCTIONED ON A NEW VEHICLE. THE WATER PUMP AND THE BELT WERE REPLACED AFTER THE SERVICE DEPARTMENT HAD MY VEHICLE FOR A ABOUT A WEEK. THE SERVICE DEPARTMENT ADVISED ME THAT I SHOULD NOT HAVE ANY FURTHER ISSUES WITH THE VEHICLE. THE REPAIRS WERE COMPLETED ON 7/29/19. ON AUGUST 16, I TOOK MY VEHICLE BACK TO THE DEALERSHIP BECAUSE IT APPEARS THAT THE REPLACED/NEW BELT IS SPLITTING/TEARING. THE SERVICE DEPARTMENT ADVISED ME THAT THERE IS NOTHING WRONG WITH THE BELT, HOWEVER, THERE IS CLEARLY VISIBLE EVIDENCE THAT THE NEW BELT IS SPLITTING ALSO. I HAVE ATTACHED A PHOTO OF THE VEHICLE PRIOR TO THE REPAIRS; A PHOTO OF THE NEW BELT THAT IS CURRENTLY SPLITTING; THE ORIGINAL SERVICE REPAIR DOCUMENT AND THE DOCUMENT OF THE SERVICE DEPARTMENT ADVISING ME THAT NOTHING IS WRONG WITH THE NEW BELT. FROM THE PHOTO, YOU CAN CLEARLY SEE THAT THE NEW/REPLACED BELT IS SPLITTING ALSO AND IT IS JUST A MATTER OF TIME BEFORE THE ENGINE WILL OVERHEAT AGAIN AND I WILL BE ON THE SIDE OF THE ROAD WAITING FOR A TOW. AGAIN, THE SERVICE DEPARTMENT DID NOT HAVE AN EXPLANATION AS TO WHAT CAUSED THE WATER PUMP/BELT TO MALFUNCTION AND NOW THEY ARE DENYING THAT THERE IS AN ISSUE WITH THE REPLACED BELT.

2019 SONATA 2.0T WITH JUST OVER 11K MILES ON IT BEGAN TO SUDDENLY STUDDER AND WANT TO STALL AT LOW RPM OR AT THE STOP. OBDII ERROR CODE P0302. DEALERSHIP SAID CYLINDER 2 HAD LITTLE TO NO COMPRESSION AND NEEDED REPAIR. COULD BARELY LIMP VEHICLE TO DEALERSHIP AND SMELL THE UNBURNED FUEL BEING PORTED OUT OF THE EXHAUST.