Engine And Engine Cooling Problems of Hyundai Tucson - part 2

Vehicle propulsion system failed, as a result vehicle rolled down an inclined driveway in to the street and was stuck in the middle on the street in traffic. Vehicle had started normally, was able to shift into drive, no obvious warning lights or error messages displayed. Vehicle would shift into drive/park/reverse as required but would not move. Upon shutdown an restart two warning lights were display but vehicle would still not move. Vehicle only had 168 miles on the odometer. Vehicle is a hybrid, engine was running and battery charged. Apparently the problem was a failed "over the air software update", this was corrected by dealer (see attached file). Safety issue is that the vehicle, 1 failed to display any error regarding a failed update, 2 failed to immobilize the vehicle allowing to move in an unsafe state, 3 failed to notify owner that updates had been done, 4 proceeded with an over thew air update that could potentially place the vehicle in an unsafe state.

The contact owns a 2016 Hyundai Tucson. The contact stated that while driving 75 mph, the vehicle inadvertently lost motive power and was unable to accelerate above 35 mph, prompting the contact to discontinue driving the vehicle. No warning lights were illuminated. The vehicle was towed to the dealer, who diagnosed failures with the engine knock sensor and catalytic converter. The contact was informed that the vehicle was consuming an abnormal amount of engine oil. The vehicle was repaired. The manufacturer was notified of the failure, a case was opened, and the contact was provided with goodwill assistance. The failure mileage was 70,000.

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First incident was July 2025 . Car had 1300 miles. Would not accelerate over 25 miles an hour. Made an appointment with route 60 Hyundai in vero bch, FL. They could not find anything wrong. (invoice # [xxx]) second time [xxx]. 3009 miles on the speedometer. The car would not accelerate over 4mph. After several minutes acceleration was possible. We will once again return to route 60 Hyundai. Car could not get thru a busy intersection. Very dangerous. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

Shortly after purchase, I had an oil change and vehicle inspection performed. I was informed that my engine may have an internal defect causing it to burn oil excessively. I later took the vehicle to a aaa-approved Hyundai service center, where they confirmed that the engine is burning oil due to a known manufacturer issue and that it is not the result of owner misuse or neglect. I have been quoted approximately $11,000 for a replacement engine, which is an extreme and unexpected cost for a recently purchased vehicle in otherwise good condition.

See all problems of the 2018 Hyundai Tucson 🔎.

Had an oil change on September 29th. The mechanic brought to my attention metal shavings in the oil and advised that I should get rid of the car because it won’t last much longer. It drove fine for a day until the next afternoon I was driving on the highway with my children and the engine started knocking loudly. The car stopped accelerating past 45 mph. I was close to my house fortunately but barely made it as it sounded like the engine would blow. It is now sitting in my driveway still knocking when I start it and don’t feel safe driving it anywhere. There were 0 warning lights. I was not aware of the engine issues these cars had until I did some research and looks like it’s very common. Seeing some people had luck getting replacement engines in the past and many others not. This needs to be addressed and Hyundai needs to be held responsible for the awful oil consumption issue resulting in failing engines. We should not have to provide proof of maintenance when clearly this is an issue regardless.

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The vehicle is experiencing excessive oil consumption and increasingly severe engine performance symptoms. The oil level drops rapidly between changes, but the loss is not due to external leaks. The engine burns oil internally, causing residue buildup and damage to other components — specifically the intake manifold and catalytic converter, which the dealer has now recommended replacing. These issues align with the symptoms addressed in Hyundai campaign 966 (engine monitoring / knock sensor detection system), which is intended to detect early bearing wear and related oil consumption defects. However, the dealership refused to perform the required campaign diagnostics (bearing inspection, ksds verification, and oil-consumption test) without charging a diagnostic fee. Even though the engine has not yet fully failed or entered limp mode, the excessive oil consumption is already causing secondary damage to emissions and intake components. If left unresolved, this can escalate to engine seizure, catalytic converter overheating, or exhaust-related fires due to unburned oil entering the converter. These are clear safety hazards that can result in loss of power, smoke, or fire while driving. Multiple Hyundai owners have reported identical problems — excessive oil loss, residue damage to emission systems, and dealer refusals to perform campaign 966 inspections. These patterns indicate a systemic engine defect that leads to downstream component failures, not isolated wear. Replacing the manifold or converter does not correct the root cause, as oil consumption continues after replacement and will likely damage new parts. The dealer’s refusal to perform the manufacturer’s required diagnostics and their attempt to charge for unrelated repairs prevent proper defect identification. This is a serious and ongoing safety issue affecting Hyundai Tucson and other models with the same engine family.

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Dear NHTSA, I am submitting this complaint to report a recurring issue with oil consumption in my Hyundai vehicle, which I understand is a known problem affecting this particular engine type and model. I am the original owner and have been a loyal Hyundai customer for many years. I have followed all recommended maintenance, including regular oil changes. Despite this, my vehicle has developed excessive oil consumption that has not been resolved through standard service procedures. The dealership has contacted Hyundai for approval to perform a combustion chamber cleaning, but based on my research and feedback from other owners, this procedure does not effectively address the root cause of the issue. My concern is that this problem may be indicative of a broader mechanical defect that could impact engine performance and safety. My 10-year warranty is nearing expiration, and I am worried that delays in resolving this issue may result in the loss of warranty coverage for necessary repairs. I believe this issue warrants further investigation, as it appears to be affecting multiple vehicles with the same engine configuration. I respectfully request that NHTSA review this matter and consider whether a broader safety investigation is warranted. Thank you for your attention. Sincerely, kelly stafford.

2022 Tucson (nx4, alabama built) 2. 5l engine experienced a catastrophic failure leading to Hyundai dealer diagnosis that "cylinder #3 is not contributing properly," which requires a full engine replacement. The vehicle is currently located at home and is available for inspection upon request. The engine scuffing has resulted in a severe loss of power contribution from cylinder #3, leading to potential for sudden engine stall or complete loss of motive power while driving. If the engine seizes or stalls at highway speeds or during a critical maneuver (e. G. , merging onto a freeway or turning across traffic), it creates an unreasonable risk of a rear-end collision or a catastrophic accident, endangering both the driver and others on the road. Furthermore, the internal mechanical failure creates a significant fire risk due to potential oil leakage onto hot exhaust components. The problem has been confirmed by Hyundai service center in el paso, texas and three independent service centers in arizona and texas. All four assessments concluded that the vehicle requires a full engine replacement due to severe internal damage. Inspected by Hyundai service center in el paso, TX. Despite confirming failure, Hyundai refuses to provide critical diagnostic data (power balance test, endoscopic inspection, dtcs) and the determined root cause. This refusal hinders warranty transparency. The check engine light (cel) did not illuminate. Symptoms appeared late September 2025 at approximately 88,000 miles (audible engine noise/scuffing, rough idle, significant power loss). This failure at non-typical mileage demonstrates a severe internal defect and a safety system malfunction (failure of the ecu/cel to adequately warn the driver). Note: dashcam video documentation of the engine failure symptoms (audible noise and power loss) is available and can be presented to investigators upon request.

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The contact owns a 2016 Hyundai Tucson. The contact stated that while driving at an undisclosed speed, the vehicle inadvertently lost motive power. The contact was able to coast to the shoulder of the roadway, where the vehicle failed to restart. The check engine warning light was illuminated. The vehicle was not taken to the dealer or an independent mechanic. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 90,000.

Engine started making a knocking sound, light came on. Accelerates and decelerates on it's own. Dealership will not provide a diagnosis in any way, but says complete engine replacement is the answer. Car has been at dealership for almost a month.

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On sept. 12,2025, I was driving with two family members. I was stopped at a light with the auto on/off engaged. Fortunately, I had my foot on the brake as the engine revved very significantly. I threw the car into neutral and the engine returned to normal. Had I not done so, we would have plowed into two cars in front of us at the light. The car was taken to the dealership; but, they could not duplicate a recurrence in road testing.

Oil consumption.

My 2023 Hyundai tuscon has 36000 miles. Started running rough with a slight noise. First noticed on wed [xxx]. On Thursday [xxx] I went to start my car and it stalled. Finally after letting it sit a few minutes it started but only to have the sgi light flash yellow and stay yellow for the remainder of the drive. That day I made an appt at my local Hyundai dealership in brandon florida. They kept my car. Fast forward, Monday September 15th I was notified that the car had lost a significant amount of oil. Car was inspected and free of any leaks. Tech stated because of the low oil & oil pressure the battery life was significantly impacted. I would need an oil change & new battery. Upon arriving back I came across an article stating that excessive oil consumption is common among these vehicles and the dealer wasn't even going to notify me of this issue. They were not honest and I want to file a formal complaint knowing that this is well known issue. I feel unsafe driving my children around and am upset that a recall has not been issued to fix this. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

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For about a year I have had issues with my car not accelerating in stop and go traffic. I push the gas pedal and it moves a little then will not go for about 20 seconds. Sometimes the engine will flutter. I have taken it to Hyundai and was told no diagnostic codes show and they can't find anything wrong despite bringing the reports from my auto shop of these things occuring. My car is going in yet again this week because this issue continues to get worse and I have almost caused several accidents in traffic due to not being able to drive. There is a recall however Hyundai says my car is not in the recall despite the same issues the recall is for. I have all routine service done when needed and have taken care of this vehicle but I feel like Hyundai should step up because this is very dangerous not only for myself but other commuters as well. The Hyundai dealership literally said they just have the sign on their building they don't support these issues.

I leased a 2016 Hyundai Tucson from metcalf auto plaza [xxx]. Every week since then I have had to return the car for repairs. It got to a point where neil suggested he can trade it for another but each and every vehicle I test drove to replace my car was not ready to be on the road but according to them every car had just got out the shop. Instead of trying to have issues resolved the mechanics decide to make "jokes" as if your pain and suffering is a joke. Since I did not want a trade in and wanted my car fixed instead neil tried to tell me that this was my final offer which I declined because why not just fix my car? I went to talk to neil in person September 9, 2025 about getting my car fixed and the frustrations I am having because having to return the car weekly and I havent had it for a month is outrageous. [xxx] I was driving the Hyundai on the highway with my children in the car and the electricity to the car completely cut off but came right back on, I got off the highway and the car did it again and this time the wheel locked up and I almost wrecked the car. I called metcalf and the only thing they could tell me was they can tow my car to metcalf but me and my children had to find our own means of transportation. Every time I called to have my car serviced and told them about what I would hear and feel they could never make the car "do it again". I am beyond frustrated, upset and terrified because I have been telling them about smoking coming from the engine, rattling noise etc. My kids lives were put in danger and the only thing they could say was "I apologize and we can tow the car to the shop". Did not care if we had transportation and have never offered to give us any after continously getting stranded in the car. Now the car is towed to their shop once again and the car wouldnt even turn over for me to get it out of the middle of the street. I was blocking traffic and had to have the police block information redacted pursuant to the freedom of information act (foia).

Engine run hot smoke from engine car cut off wouldn't restart had totaled to Hyundai company in lithia springs GA was told by service guy that engine locked motor needed replaced. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

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Hyundai has a known issue with gdi fuel injectors. Car begins to shake and lose power and eventually will stall due to cylinder misfire caused by defective injectors.

While driving on a major highway, my car went into limp mode topping out at 60 mph then decreasing before going back to 60. My check engine light was also blinking, not solid.

Excessive oil consumption, full synthetic oil last less than 2000 miles. Transmission takes some time to respond when start driving from a stop. Car shake a bit.

Burning oil. More than a quart every couple hundred miles sometimes much more than that. Very bad burning oil smell coming from engine into the inside of my car. I feel sick everytime I drive from breathing in fumes. Need oil consumption test ASAP.

Motor is consuming a lot of oil. I need to change every month, which is very expensive.

My 2017 Hyundai Tucson has been chonking out and having acceleration problems. I thought it was because of ac running. When I took it in for inspection my mechanic stated it was misfiring. I am meticulous about routine maintenance (I. E. Tire rotation and/or replacement, oil change, inspection, etc), as well as whatever if any repairs are needed. I immediately reached out to my local Hyundai dealer but they never responded. It should be corrected by Hyundai and a recall issued. After researching the issue I see I’m not the only one with a problem. The 1. 6 l engine should have been recalled because apparently the same turbo engine in the gdi model was. I have all my maintenance records to support my claim. Come Hyundai!!! I thought you stood behind your vehicles?????.

High oil consumption leading to costly repairs outside of warranty.

Car would not go over 25 mph. Had to pull to side of the road. I had to turn the car off and on then it ran normal.

Car broke down first time about 2. 5 months ago. It was towed to fred beans Hyundai of doylestown PA and they did oil testing on it and I was told that the car was burning oil too fast. They told me under warranty they needed to do a carbon combustion cleaning. So that was down, and less than 24 hours of having the car back, the check engine light came back on, the car wouldn’t drive above 50 miles per hour, and was jumping forward (the same thing that happened the first time) I had the car towed back to the dealership and they told me there was still leftover carbon and it needed to cleaned out again. The car was fine for about 2 months, however just today it broke down again. Same problem, check engine light came on and started flashing, the car will not go above 50 mph and it jumps forward. I have now been given back a car that is unsafe to drive and put my family and 2 times. Clearly the dealership is not fixing the actual problem at hand and continues to put my family and I’s safety at risk. Each time the car has broken down I have been on the PA turnpike and been put in an extremely dangerous situation.

Electric,.

Car is burning through oil at a rate of 5l per week.

Every time I get the oil changed I have to add 2-5 quarts of oil in between changes. I had the catalytic converter replaced 3 years ago and now I have to do it again. I’ve had nothing but issues with this car and oil consumption. I shouldn’t need another catalytic converter again after only a few years. I’m doing my 3rd oil consumption test right now.

While driving to work on I-26 in the far left lane at approximately 55 mph, my vehicle suddenly and completely shut off without warning. The engine power was lost instantly, forcing the car to come to an abrupt stop in live interstate traffic. I had no prior indication of a problem—no warning lights, no messages, no abnormal performance. It took three attempts to restart the vehicle. When it finally restarted, the engine made a loud knocking noise, and the car could only move at a dangerously slow crawl. I had to cross multiple lanes of high-speed traffic to reach the right shoulder, nearly causing several accidents in the process. Other drivers had to brake hard and swerve to avoid colliding with me. This situation could have easily resulted in a multi-vehicle crash, severe injury, or death. After pulling over and shutting the vehicle off, I checked the oil dipstick and found it completely dry. The engine had failed with no warning whatsoever. The vehicle was later inspected at an independent service center and I was told the engine must be replaced, and that the vehicle is not safe to drive. I am now left without reliable transportation due to this sudden failure. This incident represents an extreme safety hazard. Losing all engine power in the far left lane of an interstate at highway speeds placed my life, and the lives of countless other motorists, in immediate danger. The outcome could easily have been catastrophic. To reiterate: the engine failed without any warning or indication, creating a life-threatening emergency situation. This is a critical safety defect that requires urgent investigation.

My engine has an oil consumption problem that I've been dealing with Hyundai on. The vehicle is a 2019 Hyundai Tucson. Last Friday [xxx] my car lost power on the freeway on a bridge and I began to slow down and couldn't pull over due to no shoulder. I had myself and my family in the car with me, (wife, [xxx] , [xxx] ) my car has failed two oil consumption tests and had a combustion chamber cleaning to try to resolve this issue. Now after losing power, the dealer has gone back on their word of engine replacement because Hyundai denied the claim. They are telling me the oil consumption lead to the catalytic converter getting plugged and losing power. The engine light for that has been on throughout all of the oil consumption testing (months) information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

I own a 2018 Hyundai Tucson with 87,000 miles that consumes about four quarts of oil per 1,000 miles. I first noticed the problem at 51,000 miles, despite regular maintenance. The issue has worsened, repeatedly damaging spark plugs and causing the car to seize. Hyundai has denied my request for a replacement engine because I am the second owner. I bought the vehicle at 26,000 miles, believing it carried the 100,000-mile warranty. I was never informed that coverage drops to 60,000 miles for second owners. I have maintained the vehicle with oil changes every 3,000 miles, yet it remains unsafe to drive long distances. This defect presents a serious safety risk, and Hyundai has not provided a resolution.

Fuel injector failure. Car was losing power completely when pressing the gas pedal then would suddenly catch and go again. Then go very slowly with little power, almost got into an accident because of the loss of acceleration. They replaced the fuel injectors and it is now happening a second time with the check engine light coming on again. A recall needs to be made! several of the same complaints on here!!!!!!!.

On August 14, 2025, at approximately 12:40 am, my 2022 Hyundai Tucson limited suddenly stalled while driving and became completely non-functional. The vehicle had about 25,000 miles at the time. This left me stranded on the highway in the middle of the night, creating a serious safety risk for myself and other motorists. The vehicle was towed to a Hyundai dealership. The dealer claimed the issue was caused by “carbon buildup” and stated that the problem would only be considered “repaired” if I paid for a fuel injection cleaning and fuel induction decarb service (about $500). These services are not listed in the Hyundai factory maintenance schedule, and no diagnostic evidence (photos, test results, or measurements) was provided to support the claim. Because the stall made the vehicle inoperable, I believe this should have been handled under warranty. Instead, I was pressured to pay for optional services in order to have the safety issue resolved. Safety risk: the vehicle stalled without warning at highway speed, placing myself and others at risk of collision. Based on the dealerhip this needed to be serviced every 20k miles and Hyundai deosnot recommend to consumers for some reason. .

My entire dashboard goes black and I lose all directions and functions in car. It happens when driving often. Additionally after taking to dealership, it's getting worse. Now warning lights come on and stay on such as master warning lights, batteries, power steering, etc. Ac shuts off, the car misses out when driving between 25 and 30 mph. The dealership told me it's not safe to drive.

I have regular oil changes (every 3k mi) and every time I go get say there’s no or low oil. At the beginning of July my engine coil in column 3 failed and I had all four coils and spark plugs replaced. Since the replacement my engine is still consuming a quart of oil per week.