Engine And Engine Cooling Problems of Hyundai Santa Fe - part 1

On [xxx], around [xxx] I was driving my car on [xxx] and I suddenly experienced "check engine flashing" and engine misfiring. I was driving ~70-75 mph in the left lane. I immediately turned on the hazard lights and somehow manage to get to the right lane and safely stopped the car in open space on the side. This could have resulted in a very serious accident as I had my whole family in the car with me. Hyundai motor company must be held accountable for this type of engine quality issue. My car has 119580 miles. I had always car maintenance done at Hyundai dealerships to make sure that it is maintained as per the company recommended. The catalytic converter in my car was changed by the Hyundai dealership (key Hyundai manchester, CT) at approximately 96000 miles as it had gone bad in April of 2024. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

See all problems of the 2017 Hyundai Santa Fe 🔎.

Vehicle was not driven for 2 days. The check engine light is one and says "active airflap issue" the flaps appear to be open when a/c is on and closed when vehicle is off. There is no debri or anything arount the air flaps. This could cause potential overheating and should not happen in a years time. We travel for my husband's job and this could be very dangerous. We thought we were buying a new reliable vehicle.

See all problems of the 2024 Hyundai Santa Fe 🔎.

What happened: while driving in montana on September 21, 2025, the cabin suddenly filled with gasoline fumes and the accelerator pedal stopped responding. After pulling over, flames erupted from under the hood and the vehicle was completely destroyed within minutes. The passenger-side door could not be opened from the inside at first, delaying escape and creating a serious safety risk. No warning lights or messages appeared before or during the fire. (1) while driving, gasoline suddenly filled the cabin and the accelerator pedal stopped responding. Within seconds, the vehicle caught fire. The cause appears related to the fuel system, and possibly the abs module. The vehicle was completely destroyed but remains available for inspection in a private tow lot. (2) the fire spread extremely quickly. Both occupants were nearly trapped inside when the passenger-side door would not open from the inside, delaying escape. The vehicle burned on the shoulder of a busy highway in montana, posing danger to us and to surrounding motorists. (3) not after this fire, but a similar problem occurred in 2023 when gasoline filled the cabin and caused the engine to stall. At that time, Hyundai replaced the engine under warranty. (4) no. The vehicle has not yet been inspected by the manufacturer, police, or insurance. It is secured in a private tow lot and is available for inspection. (5) no. There were no warnings at all before or during the failure. Even as gasoline filled the cabin and the vehicle caught fire, the check engine light stayed off and no alerts appeared.

See all problems of the 2014 Hyundai Santa Fe 🔎.

The contact owns a 2018 Hyundai Santa Fe sport. The contact stated that the vehicle was consuming an excessive amount of engine oil. The contact stated that while driving at an undisclosed speed, there was smoke coming from the exhaust pipes. No warning light was illuminated. Upon inspection, the contact noticed suds on the exhaust pipe. The vehicle was taken to the independent mechanic, who discovered a low engine oil level and performed an oil change. The contact stated that the failure recurred with black smoke coming from the exhaust pipes after starting the vehicle. The dealer and two other dealers, cooper Hyundai (110 s quintard Ave, anniston, al 36201) and serra Hyundai (1503 gadsden hwy, trussville, al 35235) were made aware of the failure. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 113,700.

See all problems of the 2018 Hyundai Santa Fe 🔎.

The contact owns a 2016 Hyundai Santa Fe. The contact stated that while driving 60 mph and attempting to depress the accelerator pedal, the vehicle decelerated and failed to respond as intended. The contact coasted to the right side of the road, turned off the vehicle, and the vehicle failed to start. Neither an independent mechanic nor a dealer was contacted. The vehicle was towed to an independent mechanic; however, the vehicle was not diagnosed. The contact was informed that the vehicle was scheduled to be diagnosed. The vehicle was not repaired. The contact stated that the failure had occurred on four occasions. The manufacturer was not notified of the failure. The approximate failure mileage was 150,000.

See all problems of the 2016 Hyundai Santa Fe 🔎.

My daughter owns a 2014 Hyundai Santa Fe GLS, which is currently experiencing internal engine failure and abnormal engine noise. These issues directly align with Hyundai’s notification regarding the extended warranty coverage for vehicles equipped with the 3. 3l lambda ii gdi engine, which may experience abnormal engine noise or damage. Hyundai has acknowledged these concerns and extended warranty protection for engine repairs or replacement. The Hyundai holler dealership in winter park florida. Recently inspected the vehicle and reported a critical failure requiring immediate attention. The recommended service included: timing job (all cvvts, intake, camshaft, chains, guides, tensioners) both valve cover gaskets and rtv replacement ( this is the internal parts of the engine) the estimated repair cost was $6,723. 92. This recommendation reflects the exact type of engine-related failure covered under Hyundai’s extended warranty for this VIN. It is both unreasonable and disappointing that my daughter was presented with such a significant repair estimate for a condition Hyundai has already committed to covering. For context, my husband is a certified technician, and we have carefully reviewed the inspection details. The diagnosis provided by holler Hyundais service department is consistent with the warranty-covered issue. Therefore, this repair should rightfully be processed under Hyundai’s extended warranty program. I must also share that my daughter a single disabled mother of three with limited resources and income. The dealership’s approach in presenting her with an astronomical repair bill—without recognizing the warranty coverage—causes unnecessary stress and financial hardship mr jesse cappiello service consultant. Refuses to accept this as warranty, by stating the warranty is only for rod bearing failure. When the warranty clearly states engine failure I have attached the warranty info for your review.

Maintenance has been maintained on this SUV. SUV has about 20,000 miles. While at a complete stop at stop light, the SUV jerked a few times and when attempting to drive the accelerator pedal the SUV would not respond. I then put in park then back in drive slow acceleration, was able to pull over. After turning SUV off and waiting a few minutes , turned SUV back on engine light is on. Home is 10min. Away, engine light is on and acceleration sucks. By time I park the engine light is off. Wait 2 hrs. Drive around the block no light acceleration is off. Dealership is not helpful no engine lights can 0914not tell what is wrong with SUV. Its has been a week no engine light but acceleration still fill off.

See all problems of the 2020 Hyundai Santa Fe 🔎.

On [xxx}, my 2020 Hyundai Santa Fe sel 2. 0t (VIN: [xxx] ) experienced sudden complete engine failure accompanied by a strong burning smell. The vehicle would not start or turn over, stranding me and creating a safety hazard. The burning smell indicated potential fire risk. This appears to be related to the known theta ii engine defect that has caused multiple recalls and engine fires in Hyundai vehicles. Despite dealer confirmation that the engine was clean and well-maintained with no customer fault, Hyundai has denied warranty coverage. The sudden failure pattern with burning odor represents a serious safety defect that could endanger drivers and passengers. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

The engine has been running rough for awhile and emissions light came on. My car was having problems accelerating, 2 years ago the light came on but didn’t stay on so the dealer couldn’t diagnose problem.

At first I noticed that there’s a strong smell of oil when I am driving it. The engine was consuming a large amount of oil so much so that I have to keep an extra bottle of oil in my car. I will be driving and oil light shows up and I have had an oil change not just a week prior. I had an independent mechanic to come check it and he said a lot of oil is leaking out into the engine because, I never see any oil on the ground. Then finally the check engine light is on, the steering is shaking heavily and I have stopped driving it for my safety and that of others on the road.

The contact owns a 2017 Hyundai Santa Fe sport. The contact stated that while driving at an undisclosed speed, the low engine oil warning light illuminated, prompting the contact to inspect the dipstick. After a visual inspection, the contact observed that the oil was abnormally low, though the vehicle had been serviced less than a month prior. The vehicle was taken to the dealer, who performed an engine oil consumption test and found that the vehicle consumed one quart of engine oil in 360 miles. The contact was informed that the engine needed to be rebuilt or replaced. The vehicle was not repaired. The manufacturer was notified of the failure, a case was opened, and the contact was referred to the NHTSA hotline for assistance. The failure mileage was 103,000.

The contact owns a 2016 Hyundai Santa Fe sport. The contact stated that while driving uphill, the vehicle failed to accelerate above 10 mph. There was a burning odor coming from the vehicle with the check engine warning light illuminated. The contact stated that the engine had previously been replaced, but the failure persisted. The vehicle was towed to the dealer, who determined that the knock sensor needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 130,000.

Owner: [xxx] VIN: [xxx] vehicle: 2014 Hyundai Santa Fe sport my daughter purchased this vehicle in April 2025 from a licensed Chrysler dealership. On [xxx], the engine suddenly seized while driving, without warning, and would not restart. This VIN was part of recall 17v-226 (Hyundai campaign 162). Dealer records show the recall was closed with inspection only (“engine inspection, oil, dipstick”), not an engine replacement. The failure matches the defect description of the recall (bearing wear from restricted oil flow). Hyundai is refusing to repair it, claiming sludge and “maintenance neglect,” despite my daughter only owning it for 5 months and having an oil change at Hyundai in may 2025. This engine failure proves the prior “inspection” remedy was ineffective. Hyundai is also denying coverage under the lifetime warranty extension (txxi), which explicitly applies to subsequent owners for bearing failures. This is a serious safety issue. My daughter lost power in traffic, and the vehicle is still unrepaired. This complaint is being submitted on behalf of the registered owner, [xxx] , by her mother [xxx] , who is the primary contact. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

The vehicle has been taken in for routine oil changes and other routine maintenance since purchasing in January 2024. On 9/4/2025, just before arriving home from work, the oil light came on. I checked the dipstick and it was dry. There was no oil in the engine. The last oil change was ~3600 miles ago (regular intervals of 5,000 with synthetic oil). I added two quarts of oil before driving anywhere. On 9/5/2025, I took the vehicle into a shop to have the oil topped off and asked if there were any obvious signs of a leak. The mechanic noted there were no signs of a leak, but added that Hyundai had a lawsuit about the theta ii engine consuming an excessive amount of oil and to look into it. Upon looking into the lawsuit, it came to my attention that my vehicle has this engine and this is a likely culprit to the problem. This report was advised to work toward a resolution to the issue.

Check engine light came on at 100,400 mile while on the freeway and car went into limp mode. Mechanic found p1326 code and the engine knocking. Tried to drive it to the dealership and the engine seized up. Towed it to the dealership and waiting to hear if Hyundai will pay for a new engine under their extended warranty campaign.

See all problems of the 2013 Hyundai Santa Fe 🔎.

The engine starting consuming a quart of oil in less than 500 miles of recent oil change. Car has 114,000 miles and due to oil consumption lifters are now ticking louder. I was not notified of the class action lawsuit that happened due to this same issue. Oil pressure light came on.

While driving the car, started to smell gas and saw smoke. Tried to pull over and abs lights came on and lost brakes. Was able to stop using emergency break. Car was completely engulfed in seconds.

On [xxx] in rehoboth, DE, my 2023 Hyundai Santa Fe experienced a sudden and complete power failure while reversing out of a parking spot. All electrical systems shut down—including propulsion, dashboard lights, and emergency brake—causing the vehicle to roll backward into oncoming traffic. No warning lights appeared beforehand. After about an hour, power returned on its own. A passing police officer witnessed the situation and a report was filed with the rehoboth beach police department. On September 6th, Hyundai service performed a diagnostic scan of the engine and transmission systems. No fault codes were found, and the issue could not be replicated. After sitting overnight, the vehicle restarted normally and passed a road test. The dealership documented the incident but returned the vehicle without repair, stating: “cannot duplicate concern at this time. ” I was advised to tow the vehicle in if the issue recurs and, if rolling occurs again, to use a wheel chock. I purchased this vehicle new in 2023. It has only 40,000 miles and is covered under a 10-year bumper-to-bumper warranty. A failure of this magnitude—especially during a basic maneuver like reversing—poses a serious safety risk. Despite the dealership’s inability to replicate the issue, I do not feel safe operating the vehicle until the root cause is identified and resolved. I am currently in the process of escalating to Hyundai corporate for further investigation, including a buyback review, replacement evaluation, or extended diagnostic protocol. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

See all problems of the 2023 Hyundai Santa Fe 🔎.

I was driving home Friday August 29th 2025 around 10:30 am on I-70 w when I began to have trouble accelerating my vehicle. There were vehicles trailing closely behind me so I increased pressure on the gas pedal. I would feel my car forcibly trying to compensate and the rpms on the vehicle increased significantly. The check engine light then illuminated and the car stedily beagan to decelerate although rpms were increasing and the force on the gas pedal was at its maximum. I could no longer get past 30 mph. The cars behind me had to quickly change lanes behind me to avoid rear end collision and I finally pulled over to the shoulder of the highway but it was a very narrow shoulder so my safety and the safety of those driving around were compromised because they could have easily resulted in a high speed rear-end collision that could have been fatal and the location of my car on the shoulder was not safe and I could have been side-swipped waiting for a friend to come get me and for me to move my car off hat narrow shoulder. I was frantic and very emotionally distressed by this incident because all the maintenance on the car was up to date and there was no check engine light on in the car prior to this incident. The unexpected and decelleration and inability to compensate on the highway was very unsafe. I have taken my car to the delearship and they have yet to address my engine issues or the safety concerns. The rep actually laughed while I was recounting the events. I also called hagerstown police department to have a police officer come out to the breakdown site because I did not feel safe but my frined arrived before the police.

See all problems of the 2019 Hyundai Santa Fe 🔎.

This vehicle is burning oil. It burned out a spark plugs and almost caused a crash. Purchased from dealership 6/26/2025.

In relation to this incident, approximately 3,00 miles after an oil change, the engine oil drain plug fell out and caused all oil to leak and cause engine damage. Engine oil change was at approximately 125,000 miles. Drain plug fell out at approximately 128,000 miles. No warning lights or symptoms were present prior to vehicle shutting off and dying while driving. Vehicle was then towed to shop who previously did oil change. Shop confirmed drain plug was missing and oil level was empty. I am the manager of this shop submitting this on behalf of the customer with this vehicle. We are aware of the ongoing concerns in relation to case dp22-003 and would like to submit this information as further evidence for this case.

While driving on a steep, narrow grade with no safe shoulder, my 2014 Hyundai Santa Fe sport suddenly lost all forward power. The engine would rev but the vehicle would not accelerate. I was left stranded in traffic, with cars behind me and nowhere safe to pull off, creating an immediate risk of being rear-ended or rolling back into other vehicles. I had to call for a tow to avoid a serious crash. The vehicle was marked as having all recall campaigns completed, including the rod bearing inspection and knock sensor update, which were supposed to protect against catastrophic engine failure. Clearly, those campaigns were not sufficient to prevent the failure I experienced. At the time of failure, the vehicle displayed the check engine light and drivability symptoms consistent with abnormal combustion and potential bearing damage. Hyundai denied lifetime warranty coverage under the theta ii engine settlement without performing the required inspection. Instead, I was left with an estimate for engine-related repairs that exceeded the value of the vehicle, effectively rendering it a total loss. This failure is exactly what Hyundai’s recall notices describe as a risk: sudden engine failure, loss of motive power, and increased risk of crash. The fact that this happened to my vehicle despite “completed” recall campaigns raises serious concerns about whether the defect remains unresolved and whether Hyundai is adequately honoring its recall and settlement obligations. I am requesting that NHTSA investigate whether Hyundai is improperly denying warranty coverage without inspection and whether vehicles that were marked as repaired under these recalls are still at risk of catastrophic engine failure, stalling, and loss of motive power on public roads. The settlement administrator also works for Hyundai is just referring customers back to Hyundai customer care. They are not honoring this class action lawsuit and acting in bad faith and putting lives at risk.

The engine shut down into limp mode. I was on the interstate and this caused me to slow down and cause traffic problems. Yes, I have taken my car to mccarthy olathe Hyundai and was told there was a recall for knocking and would not be fixed because I needed a new engine. My engine light came on and the car slowed down. As soon as this happened I took the car to the dealership to be fixed. I did not drive the car anymore.

The contact owns a 2018 Hyundai Santa Fe sport. The contact stated that while driving at 65 mph, the engine seized. No warning light was illuminated. The vehicle was coasted to the shoulder of the roadway; however, the vehicle was in an unsafe location. The contact and his wife exited the vehicle and stood further back off the roadway for their safety. The contact stated that because of the unsafe location of the vehicle, the contact and his wife were fearful of remaining in the vehicle. Additionally, other vehicles were driving by fast. The contact stated that the failure had occurred while on a trip. The vehicle was towed to the dealer, where it was diagnosed with engine failure. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. The contact was informed that the repair was not covered under recall or special programs. The manufacturer was made aware of the failure. The failure mileage was approximately 100,316.

The engine suddenly seized up on me. Was told by my mechanic that that year and make once they get to a certain mileage gets premature engine failure. I looked it up and that year has a huge problem with this issue.

Engine siezed, causing me to have to tow my vehicle. I was moved in the military to germany in 2019, I had to have no open recalls on the car before I shipped it overseas. I completed a recall on the 5th of January 2019. On the 10th of January, Hyundai activated another recall on the vehicle. I was unaware of this recall and shipped my vehicle to germany on the 16th of January 2016. The car returned from germany in September of 2023. I had zero issues with this vehicle while I was over there, no check engine lights, no warning lights, nothing. I always changed the oil when told to do so, and when I returned from germany it was the same thing, no issues and always completed oil changes when it was needed. I had no idea of the recall, Hyundai was sending it to an address I no longer lived at. I had no reason to take my vehicle to Hyundai to check for recalls. On [xxx], my vehicle engine stopped working at 84622 miles, and Hyundai said that it would be covered under warranty, but because I did not complete the recall that was activated on the 10th of January 2019, they denied the warranty and now my car is worthless. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

I am having to get an oil change every month for the past 6 months. My engine lights comes on every now and then, and my oil lights comes on every month. Something is wrong with the 2020 Hyundai Santa Fe's and the complaints are being ignored. I have never missed maintenace on my car since I purchased it in 2020 brand new. Even the places I have taken my car to get my oil changes said they have heard of the same issues with others that have the same year and make of car. I spends at least 45-55 dollars a month just for oil changes and sometimes 16. 00 in between the changes because the light will come on before it's time for the monthly change. Please help!!!.

Approximately six weeks after purchase, my daughter drove the vehicle to a school event and back without issue—no warning lights, noises, or drivability concerns. Shortly thereafter, when attempting to leave for another event, the Santa Fe failed to start. I attempted a jump-start, only to discover that the engine had seized suddenly and without prior warning. It is available for inspection if needed. This sudden and unexpected malfunction could have happened while driving down the road and who knows what might have happened to include my daughter being seriously injured. The vehicle was towed to our local Hyundai dealer. Where the service team confirmed catastrophic engine failure. The engine has only been inspected by the local dealer. There were no warning lights, noises, or drivability issues prior to the engine failure. This engine failure happened on Aug. 16, 2025 references for review NHTSA recall report 17v-578 – notes crankshaft pin and bearing wear issues leading to potential stall. Nhtsa federal register (dp24-001) – acknowledges Hyundai’s 15-year/150,000-mile warranty extension via TSB 24-em-003h. Hyundai ksds campaign info & tsbs – detail warranty extension language for rod-bearing failures. Hyundai TSB 22-em-006h-2 (txxm) – illustrates Hyundai’s approach to extending coverage for engine failures. Consumer reports/NHTSA records – document similar sudden failures without warning lights in the 3. 3l lambda-ii engine.

I am the current owner a 2017 Hyundai Santa Fe sport. While I was driving my SUV on the highway at highway speeds at 60mph, the oil pressure and the check engine warning light illuminated all of sudden after around 1 hour of smooth ride. In the meantime, suddenly the vehicle lost motive power, the steering wheel seized and smoke came immediately. Losing motive power in running conditions and smoke coming out during failure could have endangered our lives. The smoke came out due to leakage of engine oil probably. The vehicle was stuck in the middle of the road. The vehicle was towed to the residence and then after Hyundai dealership. The dealer was made aware of the failure. The failure mileage was approximately 76,245 only. Before reporting to nhsta I have seen numerous complaints about high oil consumption and burnt valves on theta ii engines around 2017 santafe sport model and very similar occurrence of events happening to all while driving the vehicle on highways. Hyundai must need to provide support to this year model and make vehicles.

My engine failed at 113,000 miles. It just sounded like a diesel truck when I started it one day. There were no warning messages at all. It did not have any power above 45 mph. I took it to a Hyundai dealer and showed him the extended warranty letter I received from Hyundai. The letter said my specific engine should qualify for an extended warranty. However, the dealer (castle Hyundai of downers grove, IL) said because my engine failed due to timing chain failure and not connecting rod failure, Hyundai would not honor the extended warranty. That infuriates me! Hyundai should honor the extended warranty because their engine failed and it wasn't my fault. They know they have an engine problem but because my engine didn't fail exactly the way they projected it would fail, I'm screwed out of using my car. It also meant I had to purchase a new car which obviously wasn't a Hyundai. I hope you can push Hyundai to provide me financial relief or at least expand the engine warranty for others.

Bought car in 2022 when covid was still a problem. I had problems with the led screen on the dash turning off. It did come back after about 10-15 minutes. I had to pull over to the side of the road in the meantime. I brought my car in and no problem was found. I was told that there was no way they could order a $6,000 part if they could not reproduce the problem. I still have had this problem periodically, but it does not last as long. This can be a safety risk when the screen goes out when driving. My check engine light has gone off many time in the 3 yrs and 7 months of me owning the vehicle. I am asked if the light is blinking when this occurs. If I said 'no', I was told 'then you don't have to worry'. I had my car in to evaluate the engine light on, and was told not to worry that no code showed up (I did not get a service record if they didn't find any thing, despite me asking). The very next day I was stranded on a busy hwy. My car was towed to the shop. I barely got off the hwy as one of my fuel injectors was bad. I was 45 min from my home and the check engine light went on. I started driving home and called the service dept. I was told that as long as the light was not blinking, it would be ok, and I tomorrow I should call for an appt if it is still on. My car started to act up when I was nearing my home, but it was drivable. The next morning the light was still on. I did not feel safe driving it around and felt it was another fuel injector. I was driving my car to the shop and the car was slowing down a little at a time. By the time I was about 1/2 mile from the shop, my car was only going 14 miles per hour. I was driving on the side of the hwy with my flashing lights on. Very unsafe. I know that I have a lemon for a car, but not taken seriously, that is a problem. I have had many more times that my engine light was on and would bring it in for an evaluation. Sometimes things were found, other times not. I am concerned about that lack of concern.

See all problems of the 2022 Hyundai Santa Fe 🔎.

My engine failed. Dealership put it through an oil consumption test which it failed. They ended up keeping my car for 3 weeks to build a new engine, add new belts, new spark plugs and new filters to go with the repair. After completing this repair they told me they noticed my air bag light on. They recommended a new sensor to fix it. Which I was to pay $600 for. I agreed to this and had it done. I picked up the car and had it for 3 weeks before the airbag light came back on. I brought it back to dealership. They assessed it and told me the problem actually came from the seat and the total. To repair the whole seat would be $2500+ I am the only owner of this car. It has never been in an accident where the airbag deployed. It is in it's original state. I feel this is a huge safety concern that should be looked into.

Engine suddenly failed as I was sitting at a stop light and now is making a rattling/knocking noise.

Engine stopped abruptly without warning while driving vehicle.

Subject: urgent safety & warranty concern – 2017 Hyundai Santa Fe sport (TSB #21-01-002h) dear Hyundai customer care and NHTSA, I am reporting a serious safety and warranty concern regarding my 2017 Hyundai Santa Fe sport (VIN: 5xyzt3lb6hg429615, mileage:97,320). The vehicle is exhibiting excessive oil consumption after an initial consumption test burning 3quarts of oil in 725 miles as well as causing damage to the intake manifold requiring it to be repaired and is consistent with the connecting rod bearing defect covered under Hyundai TSB #21-01-002h. This TSB extends engine coverage to 10 years/120,000 miles for precisely this issue. Despite this, my authorized dealer, premier Hyundai of moreno valley has refused to take immediate corrective action and is requiring me to drive an additional 1,000 miles before performing the repair — a delay that increases the risk of catastrophic engine failure and endangers vehicle occupants and other motorists. Key points: this is a documented defect with a known history of sudden engine failure. TSB coverage and my warranty should apply immediately, without dangerous delay. The dealership’s requirement to continue driving the vehicle is unreasonable and unsafe. I am requesting: immediate authorization for the engine diagnostic and replacement under TSB #21-01-002h. Confirmation from Hyundai that I am not required to continue operating a defective engine to “prove” the defect. Nhtsa to log this complaint as part of the ongoing safety concerns regarding Hyundai theta ii engines. Please respond within 5 business days with next steps. I am prepared to provide full maintenance history, documentation, and dealership correspondence. Sincerely, lisa miller 25579 clifton CT. 951-965-6757 lmiller@mvusd. Net.