2019 Hyundai Sonata

The contact owns a 2019 Hyundai Sonata. The contact stated that while driving at an undisclosed speed, the vehicle experienced severe overheating and excessive oil consumption. The contact also stated that there was a misfire in the engine even though the spark plugs and ignition coils were replaced. Due to the failure, the vehicle could not be driven with the air conditioning activated. Additionally, the engine was knocking and shaking abnormally, causing an oil leak and a smoke odor due to the oil burning. The vehicle was taken to a dealer, where an engine replacement was recommended. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 140,000.

The oil is low, went to get looked at by another mechanic besides Dealer cause they want to hit you over the head with prices. Was told car burning oil. Took to dealer for Oil Consumption Test. Had to pay for oil change. Came back a little before 1,000 miles and car failed. They charging me 900.00 for next step because I can’t find ALL the oil changes. I just don’t get it, if this is a known issue with this model engine why do I have to pay.

On January 26, 2026, my 2019 Hyundai Sonata SEL suddenly became inoperable overnight. The vehicle had been operating normally with no warning signs—no check-engine or oil-pressure light, abnormal engine noise, overheating, loss of power, or other indication of an impending failure. The following morning, the engine would not start. The vehicle was towed to an independent mechanic on January 28, 2026, who determined that the engine was locked/seized. On February 11, 2026, it was towed to Wayne Hyundai for further diagnosis. The vehicle had only 51,533 miles and had received Hyundai’s Knock Sensor Detection System (KSDS) update. Hyundai denied warranty coverage, citing engine sludge, despite my providing a complete service history after resubmiting the missing receipts I had previously misplaced. My primary concern is safety, not the warranty dispute. A sudden engine seizure without warning could cause an unexpected loss of propulsion or create a dangerous situation if the engine fails while the vehicle is being driven. This concerns me because Hyundai Theta II engines have previously been associated with engine seizure and stalling, including issues addressed through The Hyundai Theta II Engine Settlement: and subsequent litigation involving certain 2019 Sonata vehicles. I respectfully request that NHTSA investigate whether a continuing or insufficiently addressed engine defect exists in affected 2019 Hyundai Sonata vehicles, particularly sudden engine seizure/no-start failures occurring without warning. I also ask NHTSA to examine whether existing recalls, campaigns, software updates, warranty extensions, and other remedies adequately protect owners when an engine fails suddenly before the KSDS system provides a warning.

Vehicle stalled in traffic due to recall defect. Manufacturer recall remedy is delayed beyond reasonable timeframe, creating ongoing safety exposure.

The contact owns a 2019 Hyundai Sonata. The contact stated that while driving at an undisclosed speed, smoke started coming from the hood and the vehicle was pulled over into a parking space. While opening the hood, the contact saw that fire was coming from the top of the engine. The contact stated that the fire consumed the front of the vehicle, including the windshield and the dashboard. The smoke coming from the vehicle was dark gray and turned black afterwards. The contact called 911, and the Fire Department was able to extinguish the fire. There were no injuries reported. A vehicle parked next to the vehicle was damaged by the flames. The contact's vehicle was not inspected or officially deemed a total loss. The vehicle was towed to an independent mechanic where an oil change had been performed prior to the failure. The mechanic stated that there might have been a high-pressure fuel valve on top of the engine that possibly caused a gas leak, which started the fire. The vehicle was not diagnosed or repaired. The dealer was not contacted. The manufacturer was not made aware of the failure. The failure mileage was 172,000.

Driver's side seatbelt retraction mechanism failed without warning. Intentionally brought car to dealer ASAP since it was close to 100,000 miles pointed out. This was serious safety defect dealer refused to repair under warranty.

The air bag light suddenly illuminated when turning on my car. My car has around 60k miles. It was previously repaired a few times for a power steering faliure while driving making it hard to stear. I believe that this latest failure is due to a failure of the stearing wheel clock spring or another SRS module. failure.

2019 Hyundai Sonata Sport. (Original owner). Problem: Transmission. [XXX] (9,912 miles). Lack of power, vehicle did not move when trying to merge onto freeway. Very unsafe. Also, hesitation and jerking. [XXX] (10,619 miles). Lack of power, hesitation, jerking. Hyundai tech performed TSB, TCU updates, ECU update for knock sensor performance, reset engine & transmission updates. [XXX] (41,332 miles). Harsh shifts, hesitation, jerking, clunk sound, gear grabs, bursts of power, lack of power. Unsafe to drive. February 2, 2026 (41,751 miles). Hyundai tech found leak at case seal. Hyundai replaced transmission. [XXX] rough start, vibration in pedals. March 9, 2026 Hyundai tech found transmission fluid leak at case seal. Hyundai replaced transmission. March 25, 2026 Hyundai service advisor voicemail said, have to submit to Hyundai another transmission replacement because new transmission is not good. Issues shifting in reverse, hard slams, loses gears. [XXX] picked up vehicle from Hyundai service dept. Harsh shifting, hesitation, jerking, clunk sound, gear grabs, bursts of power. Clunk sound in steering wheel when turned back-and-forth. Front end vibration & wobbly. Vehicle unsafe. May 26, 2026. I notified Hyundai Motor America. Case #[XXX]. June 10, 2026 (43,000 miles). Hyundai service dept. informed me of right and left front axle replacement, universal steering joint replacement. Vehicle unsafe. [XXX] (43,000 miles). Test drove car with Hyundai tech. Verified front end vibration & shaking. Vehicle unsafe to drive. Hyundai service manager said that Hyundai should recall the transmissions. To date, my car is still at Hyundai service dept. Hyundai's service manager said that the Hyundai service dept. will have a meeting regarding my car and include Hyundai's service director, etc. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The engine is the component or system failed or malfunctioned, and it is available for inspection upon request. Sudden loss of engine power while driving, including during highway speeds or intersections, increasing the risk of a crash. Engine stalling or failure to accelerate, preventing me from safely maneuvering away from hazards. Overheating events, which resulted in complete engine seizure and an unexpected loss of vehicle control, all which can potentially causing catastrophic incident without warning. To include, the increased risk of collision, especially if the failure occurs during traffic, merging, passing, or emergency situations. It has been reported to CC Transmission Auto Repair and independent service center. It was previously inspected by Hyundai dealer. Check engine light present September 2025.

after the car is driven for a while in warm weather, the steering can feel sticky after doing a slight turn doing more than 30 MPH. It takes extra force to return the steering wheel to the straight/neutral position. It acts as though the steering wheel is stuck in this slight turn position. The problem is intermittent but does create a safety hazard with the risk of the car being unable to easily remain in its correct lane position. Symptom summary: Intermittent; Worse in warm weather; happens after small steering inputs; Feels like the wheel is “hung up”.

For the past several years, this vehicle has experienced a recurring and unresolved engine malfunction that creates a safety hazard. The problem manifests as follows: Symptoms when check engine light illuminates: • Idle RPM elevation to approximately 1500 RPM (normal idle: 800 RPM) • Sudden unintended forward acceleration when foot is removed from brake pedal • Significantly reduced acceleration performance during normal driving • Vehicle becomes difficult to control safely The malfunction occurs intermittently but follows a consistent pattern. This is not an isolated incident but a recurring defect that has persisted for years. Multiple diagnostic and repair attempts have been unsuccessful: • Coconut Creek Hyundai service center - unable to diagnose [DATE(S)] • Independent mechanics - unable to resolve [DATE(S)] • Issue remains unresolved despite multiple service visits Despite multiple attempts by qualified technicians, the root cause has not been identified and the defect has not been corrected. This malfunction creates a significant safety hazard: • Unintended acceleration increases risk of collision • Reduced acceleration capability limits ability to merge or accelerate safely • Check engine light indicates undiagnosed system failure • Problem is intermittent and unpredictable, making it unsafe to drive I am concerned this may represent a defect pattern affecting multiple 2019 Sonata vehicles. NHTSA should: 1. Investigate whether this represents a defect pattern in 2019 Hyundai Sonata vehicles 2. Determine if a safety recall is warranted 3. Contact Hyundai Motor America to address this systemic issue

Ecm, p0303, yes, not yet, no, cel light before the car was brought to the dealership, 2019 Hyundai Sonata SE, 2.4L Theta II GDI. Perryville Hyundai IL refused applicable TSB in writing 5/4/26 despite active P0303 misfire, fuel-in-oil smell, crankcase pressure. I have Photos prove falsified multi-point inspection: 1.0 inch (.0833') wheel well discrepancy, same mileage in/out. Vehicle has stall risk. Case Manager [XXX] non-responsive 2hr 45min after requesting written tow instructions on safety matter. RSPM escalated 1:00 PM CDT 5/5/26 with 3:00 PM deadline. No contact received as of 3:03 PM. Vehicle unsafe to drive. Theta II Lifetime Warranty Settlement violation. Case #XXX. Requesting federal investigation. Photo upload is not working, I'll need a email to send them in apparently INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Automatic Emergency Braking Blind Spot Warning/Blind Spot Detection Forward Collision Warning Antilock Brake System/ABS Lane Departure Warning Lane keeping Assistance I bought this vehicle last month from a dealer and two days later all the warning lights start popping up on the dashboard so I contacted the dealer and told them what was going on with the car they told me to bring it in so that the technician can check to see what’s wrong with it they told me that there’s nothing wrong with the vehicle so I went back home and the same day all the warning lights came back on so now I’m concerned about my daughter’s safety because she use the vehicle to drive to and from school and you never know when the brakes might fail, again I just bought this vehicle a month ago just one month not even a year and it’s having all this problem even though it’s a pre-owned vehicle I shouldn’t have to take it to the shop after one month please help… thank you

I wanted to report the failure of my rear camera and/or the electrical circuit that is tied to it. It's my understanding that Hyundai has issued multiple recalls across different years/vehicles for issues in this area. My 2019 Sonata is NOT included in those current recalls. I was without my vehicle for a week and was charged over $1600 to repair. The issue was diagnosed and repaired by an independent mechanic. When they system failed numerous error lights/warning went off and continued to cycle thru (plus beeping). I wanted to report this in hopes of continued pressure on Hyundai to add this model/year to their recalls.

On April 14, 2026, my 2019 Hyundai Sonata was parked at a retail store parking lot. Returning from the store, I attempted to start the car, and it did not start. I attempted to start it again, and I saw smoke coming out from under the hood. I immediately exited the vehicle and opened the hood. I saw open flames coming out of the engine area, about 4” high. I called 911 and waited about 10 minutes for the fire department to arrive. During this time, the flames engulfed the entire engine compartment and extended vertically above the hood height. The hood eventually melted and fell back onto the engine area. The fire department came and put out the fire. The car is totaled. There were no injuries, thank God!

My 2019 Hyundai Sonata has been experiencing excessive oil consumption since I purchased it. The vehicle requires oil to be added approximately every two weeks, which indicates a serious internal engine issue. Recently, the check engine light turned on, and I took the vehicle to a dealership for inspection. I was told that the engine is “operating normally,” despite the ongoing oil consumption problem. I was also informed that the engine would only be replaced under warranty if it fails completely, such as through connecting rod bearing damage. This means I am expected to continue driving a vehicle that may suddenly fail without warning. I drive daily with my children, and I am concerned about the risk of sudden engine failure, loss of power, or engine seizure while driving, which could lead to a serious accident. I believe this is a known issue with these engines, and it represents a significant safety hazard that should be addressed before a catastrophic failure occurs.

I was driving on the interstate when my engine started shutting down on me and I’m glad I had moved to the right lane because someone would’ve hit me from the back because I never had this problem and now the mechanic telling me it jumped timing.

My oil pan cracked. I’ve never had any issues with oil pans until this one. Hyundai will not replace this under warranty.

I respectfully submit the following additional information.In connection with this matter, the dealer in question asserted in writing that I "should have refused to participate" in the manufacturer-authorized "Z05 Service Campaign"—a measure designed to prevent potential damage—and characterized the program as nothing more than "free paint work." Service campaigns administered by manufacturers are conducted within the framework of federal safety regulations pursuant to Title 49, Chapter 301 of the U.S. Code; they are neither optional nor merely cosmetic in nature. Rather, they constitute systematic procedures intended to preserve vehicle integrity and support public safety. Statements suggesting that consumers should decline participation in such campaigns—or that they may bear financial responsibility for damage incurred during their execution—raise concerns regarding how these federally supervised programs are communicated and implemented and may discourage participation and undermine public confidence in the national vehicle safety campaign system. Although the dealership subsequently offered to replace the windshield at no cost, I have not received confirmation that the repair has been completed. This offer was made only after the vehicle remained at the facility for an extended period, during which I was repeatedly placed under pressure to assume financial responsibility for damage that occurred while the vehicle was under dealership custody. I was presented with two conditional options; however, in either scenario, I would ultimately be required to accept financial responsibility for the outcome. Ultimately, I was required to assume financial responsibility for issues arising during the work. On 2/23, I was told the loaner could be reported as "stolen," and I returned it immediately. After returning the vehicle, no alternative transportation was provided while my own vehicle remained unrepaired.

consuming oil a quart every 2-3 weeks sonata hyundai in 2000 miles 3 quarts of oil were used. what happens when the motor locks up from be extremely low on oil. Possible accident! I cannot expect my wife to be checking the oil level every time she drives.