2025 Hyundai Santa Fe transmission problems

Filed Oct 14, 2026 · Engine, Transmission · CT

the ongoing safety defect affecting my leased 2025 Hyundai Santa Fe. This summarizes the facts as discussed, the danger this defect presents, and the urgent need for resolution. Summary of the Defect Since leasing the vehicle, it has intermittently and without warning decelerated to a complete stop (0 MPH) while driving, regardless of the speed at which I am traveling — including at approximately 30 MPH on local roads and at approximately 65 MPH on I-95. The specific facts of this defect are as follows: The vehicle decelerates to a full stop within approximately 5-10 seconds of the malfunction beginning, with no advance warning. After the vehicle stops, attempting to accelerate again takes approximately 30-45 seconds before the vehicle begins to move, and it does so only slowly. When this occurs, the vehicle beeps and a flashing green “OFF LIMITS” light appears. No check engine light or other diagnostic warning is triggered at any point. This has occurred approximately 25 times since I leased the vehicle. On the last three occasions I reported this, Hyundai/dealership personnel drove the vehicle and were unable to duplicate the problem. As I have repeatedly explained, the defect occurs intermittently and unpredictably, so this is not evidence the problem does not exist. The Danger This Defect Presents I want to be direct about the severity of this situation. A vehicle that decelerates to a complete stop without warning — whether on a local road or on a highway at 65 MPH — creates an immediate risk of a rear-end collision, a multi-vehicle accident, or worse. The fact that the vehicle then takes 30-45 seconds to regain even slow movement compounds this danger, particularly in moving traffic. This is not a comfort or inconvenience issue; it is a significant, stressful, and potentially deadly safety defect, both for me and for any passengers in my vehicle, as well as for other drivers on the road.

Filed Sep 19, 2026 · Seats, Transmission · AZ

the federal safety agency Vehicle Safety Complaint My 2025 Hyundai Santa Fe has a recurring problem when starting the vehicle. When I start the vehicle, the engine jumps abnormally. I have taken the vehicle to a Hyundai dealership multiple times specifically because of this problem. The condition continues to occur, but I have repeatedly been told that the dealership cannot find anything wrong and that they have to wait for a diagnostic code to appear before they can determine the cause. The vehicle has now developed an additional symptom. When I turn the vehicle off, it sometimes makes an abnormal prolonged gurgling/squeaking-type noise that continues for approximately 3-4 seconds. This shutdown noise is new and is occurring in addition to the recurring engine jumping during startup. No cause has been identified or repaired despite multiple dealership visits. I am concerned that an unidentified engine/powertrain problem is continuing and appears to be developing additional symptoms while I continue operating the vehicle. The vehicle remains available for inspection. I have also experienced problems with both middle-row seats not properly retracting/folding. I reported the problem to the dealership, but only one side was addressed. A component from the back of one seat has also detached. The detached component and vehicle remain available for inspection. I am reporting these conditions because they have continued despite repeated attempts to obtain diagnosis and repair. I do not know the underlying cause, and the dealership has not identified one. Its becoming worse then before so something is wrong.

Filed Sep 14, 2026 · Electrical, Transmission · TN

ON 3 separate occasions the vehicle has suddenly quit going.twice going through an intersection after taking off. the third time going up hill near my house. the car would only go 10 mph. A message would come up on the dash that reads " transmission system error, Check transmission oil immediately. That was not the problem. The Hyundai dealership performed a recall update on the computer the first time.but that didn't solve the problem as a week later the same thing happened .Again the car was towed to the dealership. this time another transmission service was performed according to a tech line information. after retrieving my car from the dealership I drove it for less than a week and the same thing happened. The car was towed back to the dealership again.Now the dealership says they can't do any repairs as the computer will not store any malfunction codes so they will know what to repair. I have been in contact with Hyundai Motor America and a case file has been established. " 43176412 ". Hyundai will not accept any responsibility for placing a computer in a car that will not retain a MIL code. Hyundai now tells me they have done all they can and for me to get my car from the dealership and drive it. That is ridiculous. Hyundai wants me to put myself in danger of having a wreck because the car loses power in front of traffic behind me. People start slamming on brakes to keep from hitting me and blowing their horns.I'm also afraid of some loose cannon out there having road rage at me because I can't get out of the way. As for the car and Hyundai , no mention of the shortcomings of the computer was mentioned until the 3rd time the car was towed back to the dealership. Also, there is some type of serious problem with the transmission which Hyundai is failing to be concerned with . This is a dangerous situation. do I need to be seriously injured or worse before Hyundai addresses this issue ?

Filed Aug 28, 2026 · Acceleration, Engine · TX

While operating the vehicle, the vehicle suddenly began severely hesitating and stalling. During the incident, engine RPM surged to approximately 6,000 RPM and accelerator pedal response became abnormal. The vehicle was not responding normally to accelerator input, which significantly affected the ability to operate the vehicle safely. The vehicle subsequently recorded diagnostic trouble code P0304 – Cylinder 4 Misfire Detected. The abnormal operation of the vehicle during the incident was also captured on video. The vehicle was taken to an authorized Hyundai dealership for diagnosis. The dealership has advised that because the condition is not currently occurring and they have been unable to duplicate the problem, they may be unable to diagnose or repair the vehicle. The safety concern is not simply an illuminated check-engine light or a stored P0304 code. The concern is the combination of severe hesitation/stalling, abnormal accelerator response, and the engine surging to approximately 6,000 RPM while the vehicle was being driven. The cause of the condition has not been identified and, at the time of this complaint, the vehicle has not been repaired for the underlying problem. I am concerned that this condition could recur without warning while accelerating, entering or crossing traffic, or traveling at highway speeds. A recurrence could result in an inability to accelerate normally, unexpected vehicle behavior, loss of normal vehicle operation, or a collision. Hyundai has been notified of the issue and I have requested further technical investigation of the engine misfire as well as the transmission/TCU and electronic throttle/accelerator systems due to the high-RPM event and abnormal accelerator response. I am submitting this complaint because this appears to be a potentially serious safety-related defect and I want the federal safety agency to have a record of the incident and determine whether similar stalling, high-RPM, acceleration, transmission, or engine-misfire.

Filed Aug 18, 2026 · Transmission · TX

Auto had a very strong gas smell after arriving at work. Check the engine and underneath the car for leaks but no fluids on the ground or my garage. Smell persisted while out of town and made appointment for inspection. The dealer service man said it was suffering numerous leaks and we’re awaiting parts. Latest info was still leaks present and would advise after making certain no leaks persist.

Filed Aug 6, 2026 · Electrical, Fuel system · TX

Hyundai Sante Fe Hybrid 2025 has a bad factory seal on the high voltage harness - hybrid battery connector that causes water to intrude the connector under normal conditions which can short the battery and pose a major safety issue. Hyundai is refusing warranty coverage of my shorted hybrid battery on my brand new 2025 Hyundai Sante Fe Hybrid stating “Flood” with no evidence of flood damage. My car experienced multiple P engine hybrid system faults on XXX and would not drive. I had it towed the Van Hyundai Carrollton on that date. They did not look at the car for over a week and it sat on their lot the entire time. On XXX they finally inspected it and claimed the car had been “flooded” and shorted the hybrid battery. The only evidence they provided was moisture in the high voltage harness. There were no water/silt lines, any other damage to any other components, and no evidence of any water anywhere else on the vehicle. The video they showed of the undercarriage only showed normal splash marks from driving. The car was never flooded/submerged. Any water/moisture found in the harness would have been due to a faulty/defective factory seal that should be impervious to water under normal operating conditions. No water/flooding/submersion damage would have been obvious of this. The dealership refused to provide any evidence and had no follow-up. One key aspect they refused to acknowledge was there was a massive rainstorm in [XXX] onXXX which was also the only rainstorm in the area in the previous 1-2 months. This happened while the car was on the dealer’s lot. The car had no issues with any water prior to being at Van Hyundai. A case was opened with Hyundai Corporate and the Dealship also lied stating the car wasn’t in their system until XXX, which is false as I have phone records, tow records, and appointments showing the 7/10 date, so corporate overlooked that. I disagreed with the dealerships diagnosis as it was a scapegoat finding putting all blame o INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT

Filed Aug 5, 2026 · Electrical, Engine · OH

What component or system failed or malfunctioned, and is it available for inspection upon request? The vehicle suffers from an intermittent, total engine stalling and propulsion failure. Without warning, the engine completely shuts down while driving and automatically drops the vehicle into "Accessory (ACC) Mode". The vehicle is fully intact, operational when it restarts, and is available for immediate inspection upon request How was your safety or the safety of others put at risk? This issue has occurred five total times in live traffic, severely risking the safety of the vehicle's occupants and surrounding drivers. The most recent and dangerous incident occurred on the freeway in heavy, stop-and-go traffic. A sudden, complete loss of power on a high-speed freeway leaves the vehicle entirely vulnerable to rear-end collisions, as it leaves no room or momentum to safely coast to the shoulder. Has the problem been reproduced or confirmed by a dealer or independent service center? No. The vehicle has been brought to an authorized Hyundai dealership five separate times specifically to diagnose this exact stalling issue. Because the failure is intermittent, dealership service technicians have been unable to replicate the problem during their test drives or resolve the root cause. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? The vehicle has been inspected five separate times by authorized Hyundai dealership technicians during the service appointments mentioned above. No police, insurance, or independent manufacturer representatives have inspected the vehicle yet, as the stalling has not yet resulted in a physical crash. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear?There are absolutely no dashboard warning lights, check engine indicators, error messages, or mechanical symptoms prior to the failures. The engine shuts down instant

Filed May 27, 2026 · Engine, Transmission · NH

The engine has 1205 miles on it and seized up. Autofair hyundia of Manchester denied us. We did get a warning light a couple days before. But to late just the dealer inspected it.

Filed May 3, 2026 · Engine, Transmission · FL

Driving down the highway. Vehicle random alerts that there is a transmission error.

Filed Apr 22, 2026 · Electrical, Suspension · KY

The vehicle intermittently fails to reverse properly, hesitates, jerks, and at times locks despite no obstruction present. This occurs during normal use and creates a serious safety concern, particularly when backing out of parking spaces or into traffic. In addition, the vehicle exhibits ongoing electrical issues, including intermittent warning lights, rearview camera distortion or failure, inconsistent system operation, intermittent inability to unlock using the key fob or door handle, and the vehicle fan or air system continuing to run for extended periods after the vehicle has been turned off. These issues occur without consistent warning and have not been resolved despite multiple service visits. The vehicle is also subject to an active safety recall (the federal safety agency Recall 26V218000, Manufacturer Recall 298) involving the front seatbelt anchor. The recall remains unrepaired, with no remedy currently available. I have personally experienced the seatbelt becoming stuck and not releasing properly, which presents an additional safety risk. The vehicle also experienced a battery failure. I was initially informed that the battery could not be replaced without cost; however, it was later replaced. Despite repeated concerns, the hybrid battery system was not tested or evaluated, and this remains an unresolved issue affecting vehicle reliability and safety. Additionally, the vehicle has experienced tire tread separation and peeling requiring replacement. This is not consistent with normal wear and may indicate alignment, suspension, or other underlying vehicle-related defects. The vehicle has been inspected by the dealership multiple times; however, the issues were not reproduced and no corrective repairs were performed. These problems are intermittent and occur during regular day-to-day operation. Collectively, these unresolved issues present an ongoing safety risk to the driver and others.