Table 1 shows one common engine and engine cooling related problems of the 2025 Hyundai Santa Fe.
| Problem Category | Number of Problems |
|---|---|
| Engine And Engine Cooling problems |
Vehicle exhibits delayed deceleration after releasing accelerator. Engine rpm remains elevated for several seconds, causing the vehicle to continue applying power unexpectedly. Issue began after recent repair and was not present before. Condition is intermittent but reproducible and affects drivability.
Traveling in a 55 zone on rt 27 and my vehicle lost power and said pull over and charge vehicle with engine on. I did this once and the battery went up to half way charge then I could start to drive again. Less than a half a mile up the road climbing a good size hill by the town’s salt shed—the same issue occurred. I had to pull over again and allow battery to recharge. This is not a complete hybrid, it has a gas engine not sure why the hybrid and gas are not syncing up. Many users on the internet have reported the same issue that I have experienced. Someone needs to investigate this before major injury occurs.
Gas motor is not engaging to assist electric drivetrain on a hybrid awd 2025 Santa Fe. This resulted in a dangerous situation crossing a busy road from a stop sign. The Santa Fe rolled into the intersection at the drivers request, but did not accelerate normally (only to a maximum of a few miles per hour) and felt like an eternity to cross the road. Fortunately oncoming drivers from left and right were paying attention and slowed down and in one case honked aggressively to point out we driving badly. Pulling over to the side of the road, turning the vehicle off and then back on again has sometimes made it run normally, but we limited our trips at that point to first getting safely home and then delivering it to the dealer. The 20 mile drive to the dealer required pulling over twice to reset the vehicle so the electric motor would assist. We have had repeated warnings from the onboard system including "follow up checks required - engine management system" and "there may be a problem with the engine management system contact your dealer". I will note that we have 11,000 miles and 11 months experience with the vehicle with no problems. It may not be relevant, but these new faults began 2 days routine service for oil and tire rotation when recall was performed including ecu software update for recall 25-01-028-1. Dealer is uncertain of problem and referring with outside tech assistance from Hyundai but we were told to expect 2 weeks for parts and repair and uncertainty as to whether that would fix it. In the meantime a vehicle with unreliable acceleration and top speed is unsafe and parked. I do note on this NHTSA website 2025 Hyundai Santa Fe hybrid SUV awd that there are 47 complaints. 9 relating to this problem all beginning October 2025 and none prior back to the first post of Nov 2024 for this model. Complaints similar to this for engine management and speed and power loss account for 50% of complaints for this vehicle on the nhsta website since October 2025.
My 2025 Hyundai Santa Fe hybrid has recurring powertrain communication failures starting at only 67 miles and continuing at 5,300 and 6,200 miles. Diagnostic trouble codes include u010100 (lost communication with engine control module) and multiple u100xxx codes related to transmission and can bus communication failures. These indicate loss of communication between critical control modules. The issue has happened multiple times and remains unresolved. I am concerned this could cause drivability problems, warning lights, or sudden loss of power. This appears to be a system-level defect in the vehicle’s communication network.
Immediately following routine maintenance performed at an authorized Hyundai dealership, my 2025 Hyundai hybrid Santa Fe calligraphy experienced a complete loss of engine oil, which resulted in the engine shutting down while driving on a highway. While traveling at highway speed with my minor daughter, the oil pressure and engine warning lights illuminated, followed by multiple error messages. The vehicle rapidly lost power, and I struggled to safely maneuver it onto the shoulder while high-speed traffic was passing. This created an immediate and life-threatening safety situation, with a real risk of being struck by other vehicles. We were stranded on the roadside for over three hours awaiting a tow, exposed to ongoing traffic danger. The dealership later advised that the incident was caused by a faulty Hyundai-supplied part, not driver error, misuse, or lack of maintenance. The vehicle had only approximately 4,000 miles at the time of failure. A sudden engine shutdown due to oil loss at highway speeds presents a severe risk of collision, injury, or death, especially when it occurs without warning. Given that a Hyundai component is implicated, I am concerned this may represent a broader safety defect affecting other vehicles. This incident caused extreme distress and endangered both myself and my child. I am submitting this complaint so that NHTSA may evaluate whether this issue warrants regulatory review or further investigation.
Car had an unintended acceleration. I had been stopped prior to entering my garage. I had started to slowly accelerate when the car accelerated hard. It took a lot of effort to stop the car.
Yesterday while I was driving I almost was hit by another car in an intersection. My car did not respond fast enough, the engine did not have any stregth. I found today after I took it for service that it needs a replacement of the oil pump. My car is new it only has 4 months of usage and this type of repairs is done in vehicles with a high mileage. This is very uncommon.
Bought this brand new Santa Fe in July 2025 and on day 5 after purchasing this vehicle, car stopped accelerating while driving on highway, which is a serious safety concern. Took the vehicle back to the dealership and turned out the issue is with failed catalytic converter and they had to replace it. Since then, the acceleration has not been that great and had continuous issues with random engine noises etc.
My 2025 Hyundai Santa Fe hybrid has experienced repeated, dangerously abrupt power loss while driving at highway speeds, causing the vehicle to go into "limp mode" without any warning or prior indication. This safety hazard occurred on three separate occasions: first incident: 7/29/25; mileage: 9,205. Situation: while traveling at 70 mph on the interstate, the vehicle suddenly decelerated to 35 mph and entered "limp mode" without any warning lights or notifications. Dealer repair: replaced ignition coil assembly (parts: 27301r1h, 27301-2m417). Second incident: 8/27/25; mileage: 12,898 situation: while accelerating to 65 mph on the interstate, the same loss of power and abrupt forced deceleration occurred, again with no warning. This sudden loss of speed created a serious safety hazard for me and other drivers. Dealer repair: replaced fuel pump & o ring assy-high pressure (parts: 35326-2m500, 35305-2m414 lh). Third incident: 9/25/25; mileage: 14,830. Situation: traveling at 70 mph on the interstate, the car abruptly decelerated, again entering limp mode. This caused surrounding vehicles to swerve to avoid rear-ending me, putting myself and others at risk. Dealer repair: replaced high pressure sensor (3534202m400), packing fuel pump (31115-0w000), and fuel pump and tube assy (31119-l1400). In all three cases, there was never any warning light, check engine notification, or app alert before the incident. Hyundai and my dealership confirmed and replicated the issue during each repair. I have reported the vehicle to the texas dmv, Hyundai and the dealer. These recurring “limp mode” incidents have repeatedly jeopardized my safety, my family’s safety, and the safety of the public due to the sudden, unanticipated loss of power at high speeds. Since the underlying issue persists and has required three separate major repairs, I am fearful for my safety while operating this vehicle and believe it constitutes a serious safety defect needing federal investigation.
I am reporting a critical safety defect involving my brand-new 2025 Hyundai Santa Fe. While driving on the freeway, the vehicle experienced a complete brake system failure, nearly causing a serious accident. My boyfriend was driving at the time, and when he tried to brake, the vehicle did not stop. He had to take immediate evasive action to avoid crashing, which put both of us — and nearby drivers — in immediate danger. The vehicle was purchased about a month ago and had never been serviced or modified. After the failure, it was towed to hanlees auto mall Hyundai in richmond, California, where the service department inspected it and confirmed the problem was caused by a missing clamp, which is a critical component of the braking system. This appears to be a manufacturing or dealership oversight. They took photos, documented the issue, and made the repair — but they also told me they cannot guarantee this won’t happen again. There were no warning lights, messages, or symptoms before the failure — the brakes simply stopped working during operation on the freeway. As of now: •the issue has been confirmed by hanlees Hyundai in richmond. •I have not yet received a loaner vehicle. •the car is currently in my possession, but I do not feel safe driving it. •I have been in contact with supervisor steve at Hyundai of vacaville, who has offered to pick up the vehicle and provide a loaner, but that has not yet occurred. This is an extremely dangerous failure that occurred on a brand-new vehicle. I am requesting a formal investigation into this issue to determine if it’s isolated or part of a broader manufacturing defect with the 2025 Hyundai Santa Fe. A missing brake component that results in total failure at freeway speeds is a life-threatening safety hazard and should be taken seriously by the manufacturer and federal safety officials.
I was on a semi residential-commercial street that turns on to a freeway entrance. I was turning right and unavoidably entered the freeway when the sudden loss of power occurred. The car slowed down to about 20 mph and pressing on the gas medal didn't yield any more power. I immediately pulled over to the emergency lane upon entering freeway to let fast moving vehicles pass me on the left side. I turned off the vehicle and turned it back on. It seemed to turn on as normal so I proceeded to drive home slowly, staying on the slow right lane of the freeway driving under the speed limit until I took my exit to get to my home. All seemed ok until I turned onto residential street near my home. Again the car slowed down suddenly to 20mph and giving it more gas did not make a difference. The time difference between the first and second (recorded) incident was 25 minutes apart, having driven the vehicle only 140 total miles. The dashboard flashed a 20mph speed limit even though I never set those parameters, didn't set cruise control, and I didn't have auto stop or hold buttons engaged. The car simply slowed down to a 20mph speed limit without my input to the vehicle settings.
Stopped for gas, vehicle started but would not go into gear, engine lights indicated 'check hybrid system', warning lights shown. 1/2 hr on the phone with dealership to assist. No problem detected when returning to home dealer. Second episode occurred, vehicle at dealer for the past 4 weeks. Episode repeated at dealership yet "no abnormalities are detected with diagnostics ".