Hyundai Sonata Complaints

17,026 consumer complaints on file.

#11761235September 1, 2026
ENGINE
The engine failed due to the known recall defect, dealer confirmed loss of compression in cylinders 2 & 4. I am a federal employee stationed overseas on official duty orders, and Hyundai Motor America is delaying safety recall remedies and buyback negotiations since June 9th.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11761394September 1, 2026
ENGINE AND ENGINE COOLING
The contact owns a 2017 Hyundai Sonata. The contact stated that the vehicle experienced excessive oil consumption with an abnormal burning odor. The vehicle was taken to a dealer, and an oil consumption test was performed. The contact was informed that the vehicle passed the inspection. While driving later, the vehicle stalled and was taken back to the dealer, where it was determined that the vehicle was consuming an excessive amount of engine oil, and several DTC including the Knock Sensor Detection System (KSDS) were found. The contact stated that while driving or reversing at various speeds, the vehicle shuddered, made abnormal rattling sounds, entered HEV Lock Mode, and the vehicle stalled. The vehicle occasionally came to a complete stop in the middle of the road and had to be pushed out of the roadway. On other occasions, the driver was able to pull over to the side of the road. The vehicle failed to restart and was towed after stalling. The contact stated that the check engine warning light was illuminated before the vehicle entered HEV Lock Mode, with several unknown warning lights illuminated. The vehicle was towed to the dealer, where several tests, including bearing clearance tests and unknown repairs, were performed; however, the failure persisted. During the final service visit, the dealer diagnosed the vehicle with engine wear and tear and fractured pistons. The dealer determined that the engine needed to be replaced; however, the service manager informed the contact that there was no guarantee that replacing the engine or catalytic converter would resolve the failure due to severe engine damage. The vehicle was not repaired. The manufacturer was notified of the failure and offered loaner vehicle assistance on several occasions; however, coverage for the engine replacement was denied. The failure mileage was approximately 110,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11760790August 30, 2026
SERVICE BRAKES, FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL, FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING
I was driving through a high school pick-up line where traffic was moving slowly. My vehicle was operating on adaptive cruise control, and I had my foot resting on the brake in case I needed to stop. A woman was about to cross the street, so I tapped the brakes. The vehicle did not slow down as it should have and instead began accelerating. I immediately pressed down on the brakes as hard as I could, but the vehicle continued accelerating and did not respond to my braking. There were vehicles stopped in front of me, so I attempted to steer around the vehicle directly in front of me to avoid a direct collision. The vehicle continued forward and collided with two other vehicles before coming to a stop after striking a wall. Based on what I experienced, both the adaptive/assistive cruise control and the vehicle’s braking response failed during this incident. Prior to the incident, the vehicle had been operating normally, with no warning lights, error messages, or other symptoms indicating a problem. Police and paramedics responded to the scene. I was not issued a citation. A police report was completed, and my insurance company, dealership, and lien holder have been notified. There were multiple witnesses to the incident. The vehicle remains available for inspection at the tow yard listed above.
Crash:
Yes
Fire:
No
Injuries:
2
Deaths:
0
#11760651August 29, 2026
ENGINE, ELECTRICAL SYSTEM, EXTERIOR LIGHTING
I had taken my Sonata to Mike Miller Hyndia in Peoria,I'll and they agreed to do the recall although they had my vehicle for two weeks. They did not service it and when I picked it up they said I had to drive it till the service engine light come on. I was driving it five days later and heard a loud noise and car started malfunctioning I was stuck in a middle of a intersection and I had to push vehicle off road. I broke my right hand in this process and I have also lost my job I am very concerned why they did not service it after they agreed too and sent me off in it in that condition ..The car is currently parked and unsure what to do with it ..
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11760447August 28, 2026
POWER TRAIN
The contact owns a 2026 Hyundai Sonata. The contact stated that while the vehicle door was open, the vehicle shifted into reverse and accelerated in reverse at 30 MPH. The vehicle traveled into a wooded area and the rear of the vehicle struck a tree. The vehicle was towed to a certified collision center, where it was pending an official total loss determination by the insurance company. The contact, who was standing at the vehicle door at the time of the failure, sustained external injuries, including facial scratches, bruises, a headache, and back pain. The contact was transported by ambulance to a hospital for medical treatment. A police report was filed. The dealer was not notified. The manufacturer was notified of the failure and stated that the vehicle should not have been able to change gears while the door was open. The failure mileage was approximately 80.
Crash:
Yes
Fire:
No
Injuries:
0
Deaths:
0
#11759964August 27, 2026
ENGINE
Engine locked up, crank bearing failure, found out there is known failures with this problem and Hyundai had a class action suit against them in the past and issued lifetime warranty for this engine due to this problem. Took car to local dealer, Clay Cooley in Sherman TX, they have been great but Hyundai corporate has denied the claim stating lack of maintenance records. Car has 175,000 miles on it, I have only owned it for about 5-6,000 miles. I have changed the oil in it twice myself I was able to prove one of those with a receipt but I don't have the other receipt and have been unable to get it. The dealer has records of oil changes up to 150k miles then I was able to find additional proof of other oil changes through car fax at smaller lube shops. The previous owner before me changed their own oil also and did not keep receipts I reached out to them with no luck. Ultimately there is only about a 10k mile gap of unprovable maintenance, this engine model has a known issue, it did not make it to 175k miles without proper maintenance, I can't control what previous owners did with their receipts but lifetime warranty should be lifetime not only if you can prove every detail from people you can't control.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11759884August 26, 2026
ELECTRICAL SYSTEM, SERVICE BRAKES, FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING
Parking malfunction. Parked, running car moved itself to reverse and backed up a driveway crossing a dirt road and hitting a fence and post. This car could have hit and severely injured anyone who was in the path while it was reversing on its own. Car was in reverse and all parking sensors were blaring when the car was found minutes later.
Crash:
Yes
Fire:
No
Injuries:
0
Deaths:
0
#11759867August 26, 2026
FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL, POWER TRAIN, UNKNOWN OR OTHER
Massive loss of coolant in closed loop cooling system Heat soak. Fail safe mode
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11759428August 25, 2026
ENGINE
Component & Inspection: Vehicle engine suffered connecting rod bearing failure and entered restricted P1326 "Limp Home Mode" (max 2,000 RPM). The vehicle is grounded and available for inspection at Bud Clary Hyundai in [XXX].Safety Risk: Sudden, unexpected loss of power occurred while driving, placing me and other drivers at immediate risk on public roads due to the vehicle's inability to maintain normal traffic speed or safely accelerate.Dealer & Corporate Confirmation: Active P1326 engine code is confirmed. Car has been held for 14 days. The franchise is violating federal settlement rules by explicitly refusing to execute the mandatory, free mechanical Bearing Clearance Test (BCT) unless I pay out-of-pocket fees.Inspection & Corporate Compliance Failure: Car was brought to the dealer on XXX. The service manager admitted in writing that they are withholding safety diagnostics to protect shop labor hours due to an automated computer flag regarding a clerical title brand discrepancy. Hyundai Corporate is actively enabling this violation; my case manager refuses to issue a manual compliance override for the safety test and is violating federal settlement terms by withholding my contractually mandated alternative transportation.Warning Lamps & Symptoms: Flashing Check Engine Light and limp home mode triggered instantly and unexpectedly on XXX. There were zero warning symptoms, messages, or abnormal noises prior to that date INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11759477August 25, 2026
ENGINE
Since I had Service Campaign 9C2 completed, the car hesitates to start, does a mini-lurch upon cold start and runs rough. Two weeks ago, it was put in park, lurched backwards, then died. The starter and battery have been replaced but this has not helped. The car ran fine before this update was done.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11759571August 25, 2026
ENGINE
I was on [XXX] . I was going 70 mph and then my car just instantly stopped accelerating. The check engine started flashing and I pulled to the side. There was a knocking noise and I just stopped. I called my son to come and get us and then my uncle told it to my house. I have several friends that work on cars and have a a tester. Of course they tested it in that same code came up as if it was the knocking center, so I had another friend come and tested with a different tester with the knocking sensor out his own cylinder three it’s not the knocking center the bearing in the motor is on cylinder two, which that’s what it is. I put my pen. I I put my pin number on the website and it’s showing that my car is affected. No it’s not showing on y’all‘s recall because it’s not something that you’re gonna recall. I have a history of my car motor being fixed every six years if I need to provide that, I will email that I’ve been given the runaround to get my car fixed because it’s not showing up on y’all recall, but it is a recall for the bearing in the motor we could’ve gotten hurt no warning no nothing. I just want to be done right because I’ve had my car service for the last six years and nothing went wrong. I just want y’all to be fair and do right and put that on y’all’s recall, I would hate to take this further but if I have to, I will sincerely [XXX]. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11759071August 24, 2026
ENGINE
I bought this car new in 2015, when I was at 97000 miles they had to replace the motor and turbo, I am now at 155844 and they are telling me that basically all 4 cylinders have low compression, cylinder 3 is the worst. They are telling me that this car has to have a new motor. I have not done anything to this vehicle to cause no compression. They want me to pay around 8800.00 to get this fixed.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11758874August 23, 2026
ELECTRICAL SYSTEM, VISIBILITY/WIPER, UNKNOWN OR OTHER
Blower motor malfunction at night. Smelled something burning. Extremely hot and humid outside. Windows fogged up inside which greatly reduced visibility. Checked the multifuse which controls the ABS, oil pump, cooling fan, & Blower. I discovered a burnt connection on one of the terminals for the blower. This is a huge safety and fire risk and needs to be addressed ASAP!!!! Upon my research, I’m finding several Hyundai Sonata vehicles having this same exact issue. Kia vehicles are being recalled for this same exact issue. Why isn’t the Hyundai Sonata??
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11758919August 23, 2026
BACK OVER PREVENTION: SENSING SYSTEM: CAMERA
The reverse camera only shows a black screen and will put drivers in danger while not being able to see behind them while reversing. This needs to be recalled and repaired. Especially in situations where a person is reversing out of a driveway onto a major/busy road. Sometimes it works, but a lot of the time it is just a black screen with the green, yellow, and red lines to indicate how far your wheel is turned. But it doesn’t allow you to actually SEE where you’re backing up into or the cars coming from either side of you while trying to back out. It’s very dangerous and it seems to a be manufacturer’s defect that needs to be addressed by the company itself, since they’re the ones who made and installed the product incorrectly.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11758433August 21, 2026
UNKNOWN OR OTHER
While getting my car serviced, the mechanic told me that there was a leak in the coolant system. They could not detect/see any leaks anywhere and that the leaking was probably going into the engine or fuel.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11758588August 21, 2026
FUEL SYSTEM, GASOLINE
The contact owns a 2021 Hyundai Sonata. The contact received notification of NHTSA Campaign Number: 25V796000 (Fuel System, Gasoline); however, the part to do the recall repair was not yet available. The contact stated that while driving at an undisclosed speed, the vehicle independently accelerated and decelerated while the accelerator pedal was depressed. The check engine warning light was illuminated. The vehicle was towed to a local dealer where it was diagnosed with an expanded frame due to an expanded fuel tank. The vehicle was deemed too expensive to repair per the local dealer and was towed for a buy-back. The manufacturer was made aware of the failure, but no assistance was provided. The failure mileage was approximately 55,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11758160August 20, 2026
ENGINE
The vehicle suffered an abrupt, internal engine seizure while operating in active traffic at highway speeds. This sudden loss of power created an immediate crash hazard, as the vehicle decelerated rapidly in the travel lane, narrowly avoiding a rear-end collision and putting my family and other motorists at extreme risk. The vehicle was towed immediately to an authorized Hyundai dealership service center where it is currently awaiting the physical recall inspection. Prior to the complete engine failure, there were no warning lights, abnormal gauge readings, dashboard messages, or noticeable performance symptoms. The engine seized completely without warning. The vehicle has an open, uncompleted Federal Safety Recall 162 (NHTSA Campaign Number: 16V729000) for this exact engine manufacturing defect and bearing failure.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11758369August 20, 2026
SEATS
The driver's power seat track master assembly (Part#88500-L0030) on my 2020 Hyundai Sonata suffered a catastrophic structural failure while operating. The black plastic bracket housing and aligning the electric drive motor fractured. This caused the motor to pull out of alignment, twisting the driver's seat violently sideways and permanently jamming the tracking rails. This is a chronic, repeat safety component failure on this specific VIN. The original factory seat track assembly suffered an identical mechanical failure and was replaced by warranty on 10/3/2023 at 46,369 miles. This second factory replacement unit failed in exactly the same manner on 8/13/2026 at 82,271 miles-lasting only 35,902 miles under normal operating conditions. I weigh 95 pounds. A driver's seat structurally shifting sideways dynamically presents an immediate, severe crash hazard. It instantly alters driver ergonomics, compromises the structural crash-anchoring performance of the seat frame, and potentially restricts pedal access to the brake and accelerator. The manufacturer is actively denying product liability by classifying internal structural breakages of shielded components beneath the cushion as user "damage" rather than an engineering or climate-related material defect. This tracking component must be formally investigated for systemic failure patterns to prevent accidents.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11757938August 19, 2026
ENGINE
The contact owns a 2011 Hyundai Sonata Hybrid. The contact stated that while driving at an undisclosed speed, there was an abnormally loud sound coming from the vehicle. The contact turned off the vehicle, and while inspecting the vehicle, the contact became aware that there was a puddle of oil on the ground underneath the vehicle. No warning lights were illuminated. The vehicle was taken to a nearby Ford dealer, where it was diagnosed with camshaft and engine failure. The contact was informed that the camshaft and the engine needed to be replaced. The vehicle was not repaired. The contact was informed of Technical Service Bulletin: 22-EM-006H-2. The contact was advised to tow the vehicle to a Hyundai dealer for assistance. The vehicle was towed to an alternate dealer where the failure was confirmed. The vehicle was not repaired. The manufacturer was made aware of the failure, and a case was filed. In addition, the contact was informed that the repair was not covered under warranty. The contact was informed that the repair was denied because of the previous owner's negligence with maintenance of the vehicle. The failure mileage was approximately 120,744.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11757985August 19, 2026
FUEL/PROPULSION SYSTEM
Issue- fuel pump/supply line causing fuel to leak and fuel smell around the outside of the car. This can cause a major fire, explosion, death for myself and others around me. Problem has been confirmed by auto repair shop. No warning messages on car dash board, just strong smell of gas. Replaced gas cap and smell is still there.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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