2015 Hyundai Tucson

My 2015 Hyundai Tucson with the 2.4L engine developed a loud engine knocking sound while driving. The knocking became worse and the vehicle became unsafe to drive due to the possibility of sudden engine failure. The vehicle is currently at a Hyundai dealership and has been there for over a month. The dealership denied the warranty claim stating that a different engine component failed instead of the connecting rod bearing. This engine is part of the known Theta II engine defect issue that has caused engine failures in many Hyundai vehicles. A sudden engine failure while driving could result in loss of power, difficulty steering or braking, and could increase the risk of a crash. I am filing this complaint because the engine failure symptoms match the known defect pattern, and the vehicle may be unsafe if the issue is not properly addressed. Hyundai Tucson with 113,000 miles and failing engine. I’ve been told repairs have amounted to $10,000. I was told my car has severe engine failure and must be replaced by Hyundai of the shoals in Tuscumbia, AL. Engine failure is dangerous as a fire may start from a metal piece and also loss of control of vehicle is possible. Hyundai has denied warranty as they say the exact part in theta 2 engine settlement is not failing. I have had to complete recalls on this car since the first payment I made on it. The engine knocking began a month ago and that’s about how long the dealership has had my car.

On March 13, 2026, I was operating my 2015 Hyundai Tucson when the steering locked up, causing me to crash into a tree head-on. In the course of this head-on crash, my airbags failed to deploy. As a direct result of my airbags not deploying in a serious car crash, my head hit the steering wheel, causing a confirmed concussion diagnosis of Post Traumatic Headache and Post Concussion Syndrome in a hospital emergency room. There were no lights or symbols on the dashboard prior to the accident. My car had a prior repair for a front end collision in a body shop and a replacement of the engine in a Hyundai dealership prior to the accident. My car is currently in a tow yard. There has been no inspection of my car by the manufacturer. I have since discovered that there are a number of complaints filed with the National Highway Traffic Safety Administration ("NHTSA") from other Hyundai Tucson owners for the model years 2005, 2006, 2007, 2012, 2013, 2019, and 2023 complaining of the same defect in their Hyundai Tucsons – the failure of the airbags to deploy in serious car accidents. I believe this represents a systemic safety defect in the Hyundai Tucson airbag system that has not been addressed for the 2015 model year. This failure put my safety at serious risk and resulted in significant injuries that could have been prevented had the airbag system functioned as designed.

On January 7, 2026, shortly after delivery of a used 2015 Hyundai Tucson (VIN [XXX] ), the vehicle experienced immediate mechanical failure while being driven, resulting in sudden loss of power and drivability. Multiple warning lights illuminated on the dashboard at the time of failure. The vehicle became disabled and left the occupants stranded roadside in Fairhope, Alabama. The exact component that failed is UNKNOWN at this time. The failure appears related to the engine, powertrain, fuel/propulsion, and/or electrical systems. The vehicle was not operable after the incident. On January 8, 2026, the selling dealership (Sandy Sansing Nissan, Pensacola, Florida) towed the vehicle back to their dealership. The vehicle has remained in the dealership’s possession since that date and is available for inspection upon request. This sudden failure created a significant safety risk due to loss of propulsion while in traffic and exposure to roadside hazards. The problem has not been independently repaired or evaluated by the consumer. No manufacturer inspection has occurred to the consumer’s knowledge. The dealer has not provided a diagnostic report or repair findings. No warning lights or symptoms were disclosed prior to delivery. The failure occurred almost immediately after delivery. The vehicle was sold and delivered by a licensed dealership. The sale is currently in dispute because the vehicle became disabled almost immediately after delivery due to this safety-related failure. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

At the time of engine failure, my husband was on the offramp between 140N and 24N at approximately 8:30pm. This ramp is under construction and narrow, but state troopers stopped and were able to push the car to the side of the road. As it was nighttime, my husband and /or other motor vehicle drivers/passengers could've been seriously injured. The car did not display any warning lights or signals. The car was then towed home and then to Empire Hyundai in Fall River, where it was assessed. It was determined that there were 5 outstanding recalls on the vehicle. Hyundai fixed all, with the exception of Recall #966, which was issued and not repaired PRIOR to my purchasing the vehicle. Hyundai Corporate was contacted by Aaron at Empire Hyundai. They (Corporate) refuses to replace the engine. According to Corporate, this should've been fixed by the independent dealer or owner PRIOR to being sold to me.

Driving on interstate for approx 30min and the car stopped accelerating. We safely merged off to the side and the car completely shut off. The car would not start. We put oil in and it started up by engine light was on. We got vehicle towed 1hr back into town. We are lucky no cars were behind us to cause an accident. We are also lucky engine did not catch on fire. This happened completely out of the blue. I get my vehicle serviced regularly and serviced at Hyundai dealerships for major repairs. The engine failed us and is available for inspection. Our claim was denied by Hyundai due to my mileage being 10k over the warranty. However they installed the faulty engine so regardless of mileage this needs to be resolved.

The engine failed two years ago at 86000 miles. Hyundai replaced the engine for it to start knocking and stop working a year later. I completed all of the first oil changes, slow driving, ect. Seems like an engine problem with Hyundai itself.

I started having oil issues 3 years after purchasing my hyundai Tuscan 2015. I took my vehicle to hyundai several time all of which I was told by service guy and I quote “Hey its Hyundai, just following up so right now we have a consumption issue. It is currently 2.5 quarts low. The tech recommends re doing the oil change and returning in 1000miles and recheck. When you return and we see that the oil level is more than a quote low then we would have you reduce the service interval from 5000miles to 3000miles, let me know if you have any questions. I had many questions and also wanted to know why it was my responsibility to do all these things if they know the engine is faulty. Had another diagnostic and the code P1326 populated. That means indicates an issue with the Knock Sensor Detection System (KSDS), often pointing to actual engine knocking caused by worn connecting rod bearings, but also potentially to a faulty knock sensor, wiring problems, outdated ECM. The Theta II engines are documented to have clogged oil galleys, preventing proper lubrication and causing premature wear. They do everything the can NOT to fix the issue even with a lifetime warranty on that engine.

Without any notice, the crankshaft seized while driving 55 mph on the highway. We were on a highway with one lane in each direction and a shoulder. No warning lights appeared until after the engine failed. We were barely able to coast to the shoulder at the time. The incident blew a baseball size hole in the engine. The vehicle was towed to over 60 miles to Noller Hyundai of Lawrence, Kansas. The repair was paid for under the Hyundai warranty without me providing any maintenance records. The engine is not in our possession for you to inspect, but I'm sure you could reach out to the dealership where it was replaced.

engine is burning oil. have to replenish oil level once a month, started about a yr ago

On [XXX], my husband and I were driving on [XXX] (Highway) in the slow lane, when the engine shutoff without any Service engine light warning. It was frightening because an tractor trailer was directly behind the car as we lost power. There was no sounds of engine parts knocking or pinging when the problem occurred. The only thing was observed was (two) 2 puffs of smoke seen from the tailpipe, witnessed by my son who was following behind in his vehicle. The vehicle was not able to start after shutdown and had to be towed to my home. We purchased a new battery after assuming battery failure--with no resolve. The vehicle was towed to(two) 2 repair shops with the same conclusion: Seized Engine After checking Open Recalls on my vehicle, I contacted Hyundai to check for assistance. The vehicle is now at the Hyundai dealership in McDonough, Georgia for inspection. I am thankful that my husband and I were not injured or laying in a Morgue after this frighten ordeal on the highway when the Engine suddenly shutoff/Seized. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The engine uses about 3 to 4 quarts of oil before a oil change the it will go in limp mode. I have to get it rest and then add oil for the engine to run right. Also transmission don't want to shift 3 to 4 gear it will be 35 mph to 65 before it shifts. When the car goes in limp mode I lose power going up a hill and almost got rear ended. They won't do anything do to its a used car. No lights came on the dash till it acts up.

--->While I was driving my hyundai tucson engine seized (-engine model (lm) 2.4l theta ii--> 63,664 miles). Yes, the vehicle is available for inspection. ---> As I said before I was driving in a express way when the incident happened. My car just stopped working out of a sudden and I had to take the side road by applying a much force effort from myself not to get hit by several vehicles behind. When I finally managed to step aside, I sensed some sort of smoke smell. And also all warning lights from car dashboard came up with no prior lamp alerts before this incident. ---> I took the vehicle to the nearest repair shop called Sam's certified auto repair. And there it was diagnosed that the vehicle engine was seized. So i inmediately called the dealer and the asked me to tow my SUV. There they diagnosed the vehicle with a seized engine too. From there on I found out that these vehicle i bought have a recall and that the this engine model has a major malfunctioning manufacture issues. Then I tried to get an authorization approval for a new engine but it was denied because they stated that I have a savage title.

The engine completely shut off while I was driving 70 mph on the highway. I lost braking and steering power. I had NO warning, no lights came on at all. I bought it used on 11/20/2023 and I have only driven it 6,011 miles.

Left passenger door, (that has child safety lock engaged,) will not open, from either the inside or the outside, when the unlock door button is pushed. When manually unlock door, it still won't open from either inside our outside. I have owned this vehicle for 9yrs and am less than 54,000 miles driven. This is a safety concern as I 2 small grandchildren and I need access to both doors.

- My engine seized while driving North on [XXX] from San Diego to CA. After having it towed to a shop I was informed it was completely out of oil which caused the engine to seize and would need to be replaced. My last oil change had taken place within about 6k miles and should not have been out of oil. Additionally no oil light, engine light, or any light on the dashboard was on to notify me something was wrong. - I was on a major CA highway in the far left lane when the engine seized and would no longer accelerate. I was incredibly lucky to make it across 4 lanes and that there was an off-ramp right there so I could get off the highway. This could have caused a massive pile-up accident. - The first shop it was towed to confirmed no oil and engine seizure. Hyundai has only acknowledged I need a new engine but won't confirm it was due to lack of oil, likely because they know there are massive oil consumption problems with this Theta II engine. - Hyundai has now had my vehicle for 2 months and is denying warranty coverage as I cannot produce 2 out of 9 years of oil change records. I have provided the other 7, which include records of the last 4 years of consistent oil changes. - There were no warning lamps, messages, or other symptoms of the problem before failure. There was no way I could have known anything was wrong or that this was going to happen. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Our 2015 Hyundai Tucson check engine light started flashing and went into "limp mode" while driving on the freeway. Limp mode means the car loses power to accelerate, struggles going up hills, and limits speed. Thankfully I was not pulling out. The vehicle was towed that day to a mechanic who found traces of metal in the oil (see documentation). The vehicle was then towed to the Hyundai dealer. The dealer explained there is a common problem with Hyundai engines failing due to rod bearing issues and PistonSlap. I later learned the dealership covers the rod bearing issues due to a court settlement from being sued for so many engine issues. The dealership said if they found it was an engine bearing rod issue (ring connecting to the piston) they would replace the engine since it was a safety issue. They claimed if it was a piston slap it would not be covered (even though the bearing rod is connected to the piston and could potentially cause PistonSlap). After checking that the car had been taken care of extremely well with oil changes around every 3 months and all safety procedures had been taken they performed a bearing clearance test. The test passed without error detection so they changed the existing knock sensor. We were directed to drive the car and if the sensor turned on again to bring the 2015 Tucson back. We did and a week later, the new Knock Sensor reported there was something wrong with the engine again. I also noticed when checking the oil that smoke came from the dipstick tube. We took the car to the Hyundai dealer again. They did the bearing clearance test again. It passed again but this time they detected a rattling noise coming from the engine block. According to the records the noise was loudest to cylinder 4. The dealer claimed we needed a new engine that would cost about $9,500. Clearly, this is a piston-manufactured defect. With metal floating in the oil and a limited piston warranty it encourages the owner to drive the car until it brakes.

Ticking sound (loud noise ) from the engine and the check engine light is flashing. The mileage on the car is 142600km.

Bought the vehicle as is with "1 owner, who was older" drove it off the lot and rest drove it, at 57,000 miles. Perfect...that was november 2023.. 3 days later my car was a little low on gas due to they didn't fill it and I left it be, started it drove about 15 miles and it starts sputtering and almost stalls out. Now here I am in June and beginning of June I hear ticking under hood, thinking it's my oil, I changed it (myself) and here it is 3 weeks later oil keeps burning hot, the oil.pressue light comes on when I brake and off when I give it gas, and I don't have any power what so ever when trying to accelerate and doesn't pick up speed unless I'm going downhill. I have 2 small children and a single mom working 5 days a week, I need this car to work. Please hellllpp me . We were going up a hill and I almost got rear ended because my car didn't have power. Not to mention the driver seat fuse keeps blowing out and the bolt keeps breaking so now I can't fit comfortably while.driving and my seat bounces constantly up and down when going over bumps. This was supposed to be my new beginning family car as this is the newest car I've ever owned and it's become an absolute nightmare and I'm scared for me and my children that the engine is going to blow up because that's what it sounds like or I'm going to get smashed by another vehicle due to the fact I have no power

Vehicle code P1326 Flashing engine light Knocking noises while accelerating Indicates of low oil level When accelerating in doesn’t want to accelerate and it feels like it wants to stall out and shut off

The passenger door handle will not open from the outside door after using keyless entry or door unlock. This put people at risk if someone is trying to rescue the person from an accident or other critical injury where one needs help to escape from the vehicle. There are numerous reports of this manufacture and model where the front doors or back passenger doors will not open. Carguru has a page listing this issue as well [XXX] The issue just happened one day when I tried to open the door for someone. This needs to be investigated. I have been told by a local mechanic that it would cost anywhere from $400 to $800 in repairs. The second issue is that the engine burns oil faster than normal. I have a normal commute to work and before the 3,000 mark for an oil change, my oil light comes on in my vehicle. I check the oil only to see that it's very low. My mechanic has stated that Hyundai Tuscan and the Kia Sorento have this engine issue. The burning of the oil is faster and the catalyst converter has to be changed faster due to high amounts of carbon being burned. Please look into this matter INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)