Engine And Engine Cooling Problems of Hyundai Sonata - part 2

I am leasing a 2017 Hyundai Sonata from car city in michigan. In may 2025, the vehicle received a brand-new engine replacement due to previous problems. I picked the car up on [xxx], and on the same day, the vehicle began malfunctioning. It would not accelerate properly, jerked and stalled, and multiple warning lights — including the check engine light — came on immediately. This made the car unsafe to drive. I contacted the dealer, but they told me to wait until Monday to get it looked at, leaving me with a dangerous and unreliable car. The vehicle had already been in the shop for over two months for the engine issue, and I had only driven it for six months beforehand. I believe the repair or replacement engine is defective or was not properly installed. This creates a serious safety hazard. A car that stalls while driving puts everyone at risk. I am filing this complaint so this issue can be investigated and addressed if others are affected. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

See all problems of the 2017 Hyundai Sonata 🔎.

Engine failure. Happened in the middle of the beltway in DC. Was left in the middle of traffic had to get car towed. No lights were on prior to this happening. Seems everyone I have talked to with a senata has had engine failure and has ultimately got a new one replaced by the delorship. The 2016 isn't on the recall list only models 2011-2014. But I have heard of numerous 2015-2016 models having the same issue. This car barley had 110k miles on it before the engine failure. These vehicles are not safe and there needs to be something done. It is currently being looked at by delorship. Im hoping for the best.

See all problems of the 2016 Hyundai Sonata 🔎.

My car 2015 (Hyundai Sonata)started leaking oil, it only had 50,000 miles. My mechanic said the motor had too much pressure and kept pushing oil out. He advised me to take it to the dealership for a motor recall. The dealership gave it back with a list of things to fix. Replaced the valve cover gasket but still leaked oil. I found out these cars have an oil leak problems that are not being addressed. My car went up in flames 2 weeks later. I have done everything I could to save this car but nothing saved it. My grandkids were in the car and it had traumatized them.

See all problems of the 2015 Hyundai Sonata 🔎.

While driving 60–70 mph on [xxx] just north of sylmar, I suddenly heard a loud, deep “pop” from the lower part of the car. Within seconds, the engine began steaming heavily and leaking oil everywhere. I immediately turned on my hazard lights and began maneuvering toward the right shoulder, crossing multiple lanes with semis and fast-moving traffic approaching behind me. I felt unsafe and feared the car could catch fire or explode, especially with smoke and oil present. After safely exiting the vehicle, a mechanic later told me the rod bearing blew and punched a hole through the bottom of the engine block, calling it a total engine failure. He said it would require a full replacement and matched known issues with this model. There was no warning before the failure. I’m having it inspected at Hyundai of downtown los angeles on July 28. I believe this event posed a serious safety hazard to me and others on the road. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

See all problems of the 2010 Hyundai Sonata 🔎.

With no warning my car left me sit on the side of the road and when started the engine made an awful knocking noise. Hyundai denied to replace the engine despite there being at least 2 engine recalls. When I asked why they said it was due to no maintenance records so I provided them with maintenance records like they requested and then they deny it again and say they aren’t replacing the engine because the problem with my engine had nothing to do with the 2 engine recalls my vehicle is affected by.

See all problems of the 2012 Hyundai Sonata 🔎.

After initial startup and drive for a short time, I come to a stop. Then after vehicle doesn’t want to accelerate as it normally would. Vehicle struggles to gain speed but, the engine revs excessively. I pull off the road and come to a stop and try to accelerate again and the same thing happens. I shut the vehicle off and wait a few minutes,then restart and the vehicle accelerates normally again. There were no check engine lights the when this has happened.

See all problems of the 2021 Hyundai Sonata 🔎.

Using 5 quarts of oil in 3 days.

My engine has a knock and the dealership told me that they would not fix it due to "lack of maintanence" but I tried explaining to them that I was unable to get proof because oreily and auto zone were unable to get me receipts on old purchases.

See all problems of the 2014 Hyundai Sonata 🔎.

Engine started making a noise and then the car died and would not start. We were on the highway service road when the car died in the middle of the road. We took the car to the dealership and they confirmed the vehicle engine has seized up. This is covered under warranty. The manufacturer denied the claim because of a sensor recall in August 9, 2018. We purchased this car used on July 11, 2018 and never received the recall notification for this sensor. The manufacturer is refusing to repair the engine that is under warranty.

I recently got a radiator replaced and now my car won't reverse.

See all problems of the 2011 Hyundai Sonata 🔎.

Engine seized due to extremely low oil despite more than regular oil changes.

The engine began knocking on us, towed to dealership. Safety concern was dying on the highway with other cars around. The dealer said it needs a new engine. Not sure there were any indications of failure or not. Some records indicate in order for Hyundai to warranty, this car needed to have had campaign 953 ksds installed prior. Some records such as the tg3 txxi warranty state that in April 2022, the ksds campaign update was no longer required for the Hyundai theta ii engine warranty. Owner did not perform ksds 953, based on not receiving the information. Hyundai is currently denying warranty, but if tg3 txxi is correct, the dealer has yet to fully inspect, and the fact remains that in April 2022 the campaign 953 is no longer a prerequisite. I dont feel like I should be denied assistance. Please help.

Driving and engine began to tick, for a couple minutes, then died. Would not restart.

I have contacted the guy that sold me the car he refused to fix the recall which is my motor I need something done , Hyundai won’t honor their recall .

Purchased 2019 after 44,000 miles engine was replaced metal in engine and inverter coolant issue July 2025 117,000 my inverter coolant light came in and off several times then car through all warning lights hev check engine warning shut it down went into limp mode towed to dealership they checked and cleared codes said it threw 13 codes but after clearing they stated nothing wrong with it as they went to pull car around it happened again this time code was knock sensor which they relaxed at no charge extended warranty they next day after picking up while at idle hev warning went in shut car off and it was gone kept driving nonissues the next day again it happened and this time the engine light stayed on spoke with dealership they said they would charge me diagnosis charge of 208 and if it was related to what they did. It would be covered also stated if the engine light was flashing it would be covered or it isn’t the engine isn’t covered the inverter coolant is not bubbling or moving when car is on it is an inverter coolant issue that was a problem back when my first engine was repaired and should be covered I love my vehicle but I have had so many issues since getting it major things and the lighting system showing a black spot in my view as well that could not be fixed I will attach pictures of earning lights and video of coolant not circulating and the dealership filled the coolant way over the top I have to now take it back again to have it looked at.

See all problems of the 2019 Hyundai Sonata 🔎.

The contact owns a 2011 Hyundai Sonata. The contact stated that while driving at an undisclosed speed, the vehicle inadvertently lost motive power. The contact was able to pull over to the shoulder of the roadway, where the vehicle failed to restart. The vehicle was towed to an independent mechanic, who diagnosed a failure with the engine. The contact was informed that the engine needed to be replaced. After investigating the failure, the contact related the failure to NHTSA campaign number: 21v727000 (engine); however, the VIN was not included. The manufacturer was not notified of the failure. The failure mileage was unknown.

While driving on the highway, experienced loss of power and flashing check engine light, subsequently causing engine knock and engine failure. This situation could have caused an accident and put myself and others at risk. It is understood the manufacturer has recalled more than one million vehicles due to engine failure and is working with NHTSA to address the issue. In communication with the manufacturer to inspect the damage and resolve the issue.

This vehicle has a faulty engine design which results in extreme over-consumption of oil. After an oil change, the engine will typically empty in less than a month, which is beyond a reasonable level of oil consumption. Side effects of this include other parts of the engine wearing down quicker, including the spark plugs, which cause engine misfires. Ultimately, this vehicle's engine design causes financial hardship to it's owners and poses a potential safety risk to those who drive in it. I believe Hyundai should do a recall to fix this faulty engine (with an engine replacement if necessary).

My Hyundai vehicle experienced a sudden engine failure due to a known defect in Hyundai’s gasoline direct injection (gdi) engine. This engine issue is part of a widely documented safety concern that causes rod bearing wear, leading to stalling or catastrophic failure while driving. Despite the dealership confirming it’s consistent with the known defect, Hyundai denied assistance solely because my title is branded, even though the engine failure is unrelated to any crash or damage. Hyundai has replaced engines for others with branded titles, proving the inconsistency in their handling of a serious safety problem. This defect poses a risk of stalling in traffic, engine fires, and potential accidents. The vehicle shut down completely, and I believe this violates federal safety standards.

See all problems of the 2013 Hyundai Sonata 🔎.

Car keeps burning oil faster than normal which has resulted in car not starting multiple times even after a month old oil change.

See all problems of the 2018 Hyundai Sonata 🔎.

Premature rod bearing failure at 126,750. Dealer said there was extended warranty for this failure. Turns out that Hyundai denied this because they say recall 953 was not done. This does not reflect what I show, I show this a service program and probably a notice does not get sent out. I have gotten an estimate for $7848. 50 for engine replace. I do not agree with this decision since it is a know problem with multiple class action lawsuits.

Crack oil pan.

I purchased this 2011 Hyundai Sonata (VIN: [xxx]) on [xxx]. A few weeks later, the engine started knocking, wouldn’t shift beyond 2nd gear, and wouldn’t go over 60 mph. A diagnostic test at express oil returned the error code p1326, which is tied to Hyundai’s recall campaign 132 for engine failure due to bearing wear. I brought the car to serra Hyundai in trussville, al. I provided my bill of sale, diagnostic code, and a recent oil change receipt, but Hyundai denied my engine replacement, saying there was a gap in service history between 2021 and 2025 — even though I was not the owner during that time. They confirmed it was a recall-eligible engine and admitted the failure matches the recall symptoms, yet are refusing to fix it — while also suggesting I “trade the car in” instead. This is a known safety defect, and I believe Hyundai is wrongfully denying legitimate recall repairs based on ownership history rather than actual engine failure. I am now without a working vehicle. I respectfully request that NHTSA investigate Hyundai’s denial of engine replacements under campaign 132 for new owners and hold them accountable. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

Coming home from work I stopped at a red light and when I tried to accelerate the vehicle was surging and jerking shaking and wouldn't pick up speed 2 min later the check engine light appeared flashing thankfully I was 5 min from home got the car towed the next morning to Hyundai dealership said it was an cylinder misfire the car only has 30,000 miles on it.

See all problems of the 2023 Hyundai Sonata 🔎.

Engine is burning up full tank of oil in a few days there are no oil leaks coming from the car. The car has been expected and worked on by multiple mechanics. The engine lights keeps coming on.

The vehicle experienced engine stalling and rough running. We discovered it had an open engine recall related to known defects in the theta ii engine. We dropped the vehicle off at a Hyundai dealership (Hyundai napleton) on July 1st, 2025 for recall repair, following instructions from acv auctions. After holding the vehicle for over three weeks, Hyundai napleton informed us they could not perform the recall due to their internal policy against working on dealer-owned vehicles. This directly contradicts the purpose of a federally mandated safety recall, which is supposed to apply regardless of ownership. On July 23, 2025, we received a call from Hyundai motor America, stating they would not approve the recall repair because the vehicle had been declared a total loss. This is entirely false—the vehicle has never been declared a total loss by any insurance company or official source. It appears Hyundai motor America and the dealership are passing responsibility back and forth, providing conflicting and inaccurate information, while the vehicle sits unrepaired and inoperable. This behavior delays a federally mandated repair, puts consumers at risk, and reflects serious breakdowns in how Hyundai handles recall compliance. We need NHTSA’s help to investigate and enforce the proper handling of this safety recall. Vehicle VIN: [xxx] information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

Engine consumes excessive amount of oil, approximately 5 quarts every 1,000 miles. No leaks found when taken for inspection.

Check engine light keeps coming on got it looked at , certain parts replaced & it’s still on something to do with the air filter.

The camshaft position sensor internal rubber plug is faulty and it allows oil to leak into the sensor housing. Ruining the sensor and the brushes and housing. It causes the check engine light to come on the idle races and car takes off on its own. Can’t drive it because it’s to dangerous. Once it takes off then it goes into limp mode and you can’t pull out because of no power. 40000 miles. The internet is full of owners having the same problem.

The contact owns a 2020 Hyundai Sonata. The contact stated that the vehicle hesitated while depressing the accelerator pedal, with the check engine warning light illuminated on the instrument panel. The vehicle was taken to several independent mechanics and dealers to be diagnosed; however, the cause of the failure was not determined. The contact stated that one mechanic replaced an unknown sensor, but the failure returned soon after the repair. The manufacturer was notified of the failure. The vehicle was not repaired. The failure mileage was approximately 101,000.

See all problems of the 2020 Hyundai Sonata 🔎.

What component or system failed or malfunctioned, and is it available for inspection upon request?\n' + 'the engine in my 2017 Hyundai Sonata is defective. It burns oil excessively, fouls spark plugs and ignition coils, and causes continuous misfires. The engine is still in my possession and available for inspection. \n' + 'how was your safety or the safety of others put at risk?\n' + 'the engine misfires cause my car to shake violently while driving, lose power unexpectedly, and turn on the check engine light. This creates a risk of stalling or losing control while driving at highway speeds, endangering myself and others. I no longer feel safe driving the car. \n' + '\n' + 'has the problem been reproduced or confirmed by a dealer or independent service center?\n' + 'yes. Multiple independent mechanics have confirmed that the misfires and repeated spark plug/coil failures are caused by the engine itself, not just normal wear. Hyundai dealers acknowledged the excessive oil consumption and advised combustion cleanings, which did not resolve the issue. \n' + '\n' + 'has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others?\n' + 'yes. The vehicle has been inspected by multiple Hyundai dealerships (including mcgrath Hyundai) and independent service centers (pep boys, aamco, and others). All noted ongoing oil-related issues and repeated failures tied to the engine. \n' + '\n' + 'were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear?\n' + 'yes. The check engine light has come on repeatedly over the last two years. Symptoms include rough idling, heavy shaking, loss of power, and repeated ignition coil and spark plug failures (monthly or more often). The problem began within the first year of ownership and has persisted ever since despite repairs.

While driving our 2011 Hyundai Sonata on [xxx], my fiancée and I experienced sudden engine failure on [xxx]. The car suddenly lost power and began vibrating violently, then stalled completely and would not restart. We had to pull over in a dangerous area with no power and limited shoulder space, creating a serious safety hazard. A relative had previously scanned the vehicle and retrieved a p1326 knock sensor code, indicating a potential engine bearing issue. He cleared the code temporarily in an attempt to drive the vehicle again. However, when it failed on the freeway, we were forced to tow the vehicle twice—first to our home and then to anaheim Hyundai for diagnosis. Hyundai later denied warranty assistance, claiming "exceptional maintenance neglect" despite the fact that we provided all available oil change records since our 2017 purchase. We were not the original owners, yet were expected to produce records dating back to 2013. No sludge or varnish evidence was cited in the repair order, and the dealer simply claimed a seized engine. We’ve since been denied under both the extended warranty and goodwill policies, even though our engine displayed the same symptoms covered in the theta ii engine class action settlement. This failure was dangerous, left us without transportation, and has caused serious financial and emotional strain. We are reporting this because it reflects a potential ongoing safety risk for other Hyundai owners. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

Whille driving back to washington state my car check engine light came on and the car shut off while I was driving. I had to have it towed to the nearest city whi ch was laramie wyoming. There is no Hyundai dealer had to drive the car once it started back up to cheyenne wyoming it was checked. My on star told me there was a problem dtc p0145100 the status had red triangle the dtc power system powertrain and the dtc sub system ems. I was told and given paperwork by the dealer and was told the car would need major repairs and could take up to 21 days once the work started it would have to he completed there because Hyundai had campaign dealing with my cars problem. I was told I could drive the car home but if the check engine light is flashing pull over immediately. My car is now at the 3rd dealer when I took it to korum in puyallup they did not have anyone to diagnose the vehicle only update onboard computer. They said and documented nothing was wrong with the vehicle which is inaccurate. I told korum about the paperwork from the dealer in cheyenne they did not so much as look at it. I took the car to the dealership in auburn washington they to had the same findings as wyoming also there was additional findings which corresponded with the smell of gas and my tank going empty after filling and trying to fill tank because was showing low fuel warning. Pictures were taken of the gas tank which had expanded as well as other pictures of the findings. I was told in wyoming and auburn that the code and findings are consistent with the Hyundai campaign.

While driving on the highway the engine caught fire.

My 2018 Hyundai Sonata caught fire unexpectedly while parked. The engine suddenly began smoking, then the vehicle ignited and was severely damaged. I am still financing the vehicle through capital one. After researching, I discovered that my vehicle’s engine is part of a known Hyundai recall due to fire risk (theta ii engine defect). I had no prior warning or engine-related issues that would have predicted this. I strongly believe the fire was caused by a manufacturing defect, and I’m requesting that NHTSA investigate Hyundai’s handling of this issue and ensure victims like myself are compensated — even if not physically injured. I can provide photos, a fire report, and additional documentation if needed. Please let me know the next steps or if I qualify for any related recall recovery programs.