Power Train Problems of Hyundai Santa Fe - part 1

I purchased a 2024 Hyundai Santa Fe sel with 16,087 miles that has a the 8-speed wet dual-clutch transmission (dct) stutters to catch gear properly while accelerating from low speeds and back to high, example driving onto a highway ramp and matching speeds with ongoing traffic). Unfortunately, there have been multiple fears and risk of safety where accidents almost occured due to the transmission not catching the engines rotational speed to exact, causing slow to no acceleration. This is very dangerous and unsafe to not be considered under investigation. This unresolved issue will deteriorate the clutch and transmission itself over time. Help!.

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I am currently burning through 2. 5 quarts of oil approximately every 800 miles.

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I was merging onto the highway and the acceleration stopped working and the vehicle would not go more than 25 mph. Had to restart car in shoulder, isue seemed to self correct but then it happened 10 minutes later stranding me in between the highway and exit ramp. This was a huge safety issue and myself and others lives were at risk. I am bringing the vehicle in for inspection but this seems to be a recurring Hyundai issue. There were no warnings that came on. The auto mode on the dash went from green to an amber color. When I restarted the vehicle nothing changed. After the second time it occurred a check engine light came on.

Component/system: the powertrain launch control system — the transmission control unit (tcu) and 8-speed wet dual-clutch transmission paired with the 2. 5t engine — fails to deliver engine power in response to full accelerator input from a stop. The engine does not rev and the vehicle does not move for approximately 1–2 seconds despite the accelerator pedal being fully depressed, then power engages abruptly and violently. The vehicle is available for inspection upon request. Safety risk: the failure occurs when launching from a stop into intersections and cross-traffic. In the most recent incident, I was turning left across the roadway from a stop with an oncoming vehicle approaching. I applied full accelerator and the vehicle did not respond at all for approximately 2 seconds — no engine response, no movement — leaving me stationary in the oncoming vehicle’s path. Power then engaged violently and without warning, causing the vehicle to lurch across the road. I was nearly struck. Similar events have occurred multiple times throughout my ownership; this was the closest to a collision. Dealer confirmation: not yet inspected by a dealer. A dealer service appointment is being scheduled. Other inspections: the vehicle has not been inspected by the manufacturer, police, or insurance representatives. Warning lamps/prior symptoms: no warning lamps or messages have appeared before, during, or after any of the events. The failure is intermittent and occurs without warning. The condition has been present since I purchased the vehicle in October 2022 and has occurred regularly throughout ownership — numerous occurrences over more than three years. No warning lamps have ever accompanied it. Additional: condition persists with idle stop & go disabled, ruling out engine-restart delay. Same 8-speed wet dct was subject to recall 236 (NHTSA 22v-746) on 2021–2022 models for similar throttle non-response; 2023 excluded despite identical hardware.

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Complaint summary: [xxx] / engine thermal fire risk / warranty deception my 2019 Hyundai Santa Fe (2. 4l gdi engine) is experiencing severe powertrain degradation under the known theta ii engine defect class-action framework. On November 7, 2025, the vehicle logged a permanent diagnostic trouble code (dtc) p1326 via an independent scan, indicating catastrophic internal rod bearing wear. On xxx, the vehicle was brought to Hyundai of milledgeville for safety recall verification. Instead of executing the mandatory corporate-directed bearing clearance test (bct) to replace the failing engine block, the service department committed technical campaign malpractice. The technician forced the 9c2 ecu software update directly over the locked mechanical fault to suppress the dashboard warning lights and alter the vehicle's rom id parameter limits. When caught via a photograph of their active gds diagnostic tablet showing 7 historical system faults, the service manager provided a truncated printed report hiding page 1 and omitting the critical p1326 powertrain code count to evade a warranty engine replacement. Due to these unmitigated delays, the vehicle has suffered severe consequential safety damage. The advanced engine degradation and oil consumption have flooded the exhaust system, melting the catalytic converter substrate and triggering a new dtc p042000 (catalyst efficiency) fault immediately after the dealer visit. The extreme engine vibrations have also damaged the transmission's torque converter clutch (dtc p074100). The dealership refused a service loaner and knowingly sent a disabled consumer and an elderly passenger away in an active, failing vehicle that presents a sudden stall-on-highway hazard and a severe thermal exhaust fire risk under extreme summer heat conditions. Hyundai motor America corporate has failed to provide emergency towing or alternative mobility accommodations despite a registered corporate case file. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(.

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The contact owns a 2022 Hyundai Santa Fe. The contact stated that while pulling out of the driveway and approaching a stop sign, the message "check transmission oil immediately" was momentarily displayed. The dealer was contacted and informed the contact that the vehicle could not be diagnosed unless the message was displayed. The contact stated that the failure recurred while driving approximately 35 mph the following day, and the engine power was reduced. The check engine warning light was illuminated. The driver contacted bluelink and was advised to pull over safely. Bluelink and the dealer advised the driver to tow the vehicle to the dealer for assistance. The vehicle was towed to the dealer, where it was diagnosed with transmission failure. The contact was informed that the transmission needed to be replaced. The vehicle was not repaired. The contact associated the failure with NHTSA campaign number: 22v746000 (power train); however, the VIN was not included. The manufacturer was notified of the failure and offered to cover half the cost of the repair. The failure mileage was approximately 74,900.

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We are driving on the highway and the engine just stop working but all lights are still working. I am trying to put gas but it seemed that the engine completely shuts off dangerously without warning. This put my family at risk because there were a lot of big trucks beside us. Theta ii 2. 0l turbo engine just stalled I believe this has been around . Can you please help us.

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The vehicle is in limp mode and is displaying a flashing check engine light with a p1326 powertrain code. The vehicle in question is a 2017 Hyundai Santa Fe sport equipped with a theta ii 2. 4l gdi engine at 118,000 miles. Per the service campaign t3g, listed on the NHTSA website, this vehicle is covered under warranty repair since it is a theta ii engine vehicle that is displaying an active p1326 power train code. The vehicle is under he 10 year/120,000 miles limitations of the extended warranty. The dealer just submitted to us a quote to repair the vehicle and is stating that none of the repairs listed are covered under warranty. This includes a quote to replace the engine knock sensor, which is a warranty item under the t3g service campaign’s extended warranty.

Vehicle stalled while driving — unsafe loss of power. While driving at normal speed, the vehicle suddenly shut off without warning and the electrical system malfunctioned. I had to pull over and restart car. This created a dangerous situation and could have caused a collision. Prior to this incidenct, the vehicle had intermittent electrical issues during startup (flickering electronics). This is the first time the car has experienced during driving, and is now at the Hyundai dealership. The car has been reported as unsafe to drive. This appears similar to other Hyundai stalling/power loss issues and may indicate a developing safety defect. Requesting investigation.

My check engine light came on, and my car was also feeling "sluggish" and slow to accelerate. I scheduled a service appointment at my local dealer 4 days later. At the appointment, the technician stated everything checked out okay and the check engine light was likely an "anomaly" or "outlier" but otherwise nothing to be concerned about since everything checked out "okay" and no problems were identified during their test drive. However, that very afternoon, I was driving down the interstate, where the posted speed limit is 70mph, when my check engine light came on again and suddenly lost power, drastically reducing my speed and could not accelerate faster than 39mph. Luckily, the interstate was not busy at the time (about 10:30-11:00 a. M. Saturday morning) and there were only less than 4 cars behind me that were able to easily switch lanes and pass me. I moved over to the shoulder to a complete stop and restarted my car. My check engine light remained illuminated and was still slow to accelerate and "sluggish" but was able to (slowly) reach interstate speed (60-70mph) until I reached an acceptable exit and safely made it to my destination. I have since used roadside assistance to tow the vehicle from my home to the the same dealership for inspection and service (again).

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The contact owns a 2021 Hyundai Santa Fe. The contact stated that while driving approximately 5-30 mph, the transmission failed to shift properly, and the vehicle lost motive power. The engine warning light was illuminated. The contact stated that the failure was a recurring failure. The contact stated that the vehicle was repaired under NHTSA campaign number: 22v746000 (power train); however, the failure persisted. The dealer was contacted. The manufacturer was made aware of the failure. The failure mileage was approximately 78,000.

We just brought this vehicle in for the ongoing transmission problem (previously reported to your agency after the car self-accelerated), as well as the missed seatbelt recall that was not addressed at the last dealership. I advised the service advisor that the seatbelt recall needed to be fixed. The service advisor contacted us several hours later to tell us that they were replacing the transmission. 10 days later we picked up the vehicle after the transmission replacement, and the service advisor told us they did not do the seatbelt repair, citing lack of parts and/or special order. I asked if this was a safety issue and if I should leave the vehicle with them for longer, but was told not to worry about it, and to bring the vehicle back at another time. Fast forward to today, and the vehicle is rolling forward when we start it. This is worse than the way it rolled forward before the transmission replacement. Coupled with the disregard for the seatbelt recall, I believe there is a serious safety issue with this vehicle. I have notified Hyundai corporate, as well as our attorney, and will be contacting the dealership to drop the vehicle off. I have a video recording of the car rolling forward during startup, but it appears I cannot upload it here. I have forward that video to the above mentioned entities, and am happy to share it with your agency as well.

Hyundai campaign 9c2 recall update: took my vehicle in to have the Hyundai campaign 9c2 recall update performed on the vehicle on June 9th, 2026. Since the update the vehicle is hesitant/jerky upon first drive of the day or anytime it sits more than a few hours. Occasionally it will do this while I am driving. I feel it is a saftey risk because this could cause my vehicle to abruptly hesitate without braking and cause someone to hit me, or worsetransmission to fail while at highway speeds. I took it back to the dealer that performed the required update around June 23rd 2026 and informed them of the problem caused by the 9c2 campaign update. I got the we don't know anything about it causing problems runaround. Even though it has been documented that dealers were notified of this problem. They then wanted to charge me a $100 diagnostic fee to see if it might be something else, I declined that because I know it is from this update. My vehicle ran perfectly fine and smooth before this update was applied and no cel lights are on. I did this update because it was required to be done by Hyundai. When I started researching why my vehicle was hesitant/jerky after the update is when I found that anyone that did this update is having these same issues, and it has been happening for a while now and Hyundai corporation has done nothing to correct this problem other than tell us to sit for at least 3 minutes or more before driving it. That does not help when it does it even after driving for a bit and possibly creating transmission problems.

My 2017 Hyundai Santa Fe (VIN: [xxx]) was brought to herb chambers Hyundai of [xxx], in December 2023 to address the underbody corrosion recall/campaign (9a0). The dealer performed the preventative service. However, the remedy completely failed because the frame was already severely structurally compromised by rust. In early 2024, I relocated to [xxx] with the vehicle. Now 2026, the front subframe sub-assembly deteriorated to a hazardous point, forcing me to spend a large sum of my own money on front-end repairs caused directly by this corrosion. Currently, the rear subframe and rear suspension components are heavily corroded and structurally disintegrated. The vehicle is completely unsafe to drive, presenting an imminent risk of structural collapse and suspension failure while in motion. Hyundai's recall remedy was ineffective and merely masked the rust. The rear subframe (crossmember/cradle) and control arm anchor points are severely corroded, rusted out, and crumbling to the touch, creating an imminent risk of suspension collapse while driving. The extreme corrosion has spread to the metal fuel line the vehicle is unsafe to drive due to the advanced corrosion . Denial of service by local distributor: the vehicle is currently located in the u. S. Territory of puerto rico. I presented the vehicle and documentation to the local authorized distributor, sojitz DE puerto rico (Hyundai of puerto rico). As indicated I brought the vehicle to mvp Hyundai humacao (xxx) and filed a claim (# xxx) however they never sent a anyone to inspect the vehicle or process a safety claim, claiming they bear no responsibility because the vehicle was imported from the mainland, because this is a failed federal safety campaign remedy that now poses an immediate threat to my life and public safety, information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

Driving at 70 mph on interstate, driver adjusted hands on steering wheel and accidently pulled both paddles, shifting car into neutral. Fortunately, there was little traffic, and the driver was able to move to the side of the interstate, out the car into park and shift back to drive. This was highly dangerous. Losing control of the vehicle while traveling at 70 miles an hour could have resulted in death. This feature is completely unnecessary in a family SUV and is going to cause an accident.

My 2019 Hyundai Santa Fe 2. 4l (VIN: [xxx]) is experiencing a severe safety defect involving rapid engine oil starvation. The vehicle recently failed an official oil consumption test conducted by fred beans Hyundai of abington, where it was documented that the engine consumed 1 quart of oil in just 881 miles (PA request #xxx). This vehicle is equipped with the theta ii engine, which currently has active warranty extensions (txxc and txxi) specifically covering connecting rod bearing failure. Despite the documented severe oil loss—which is the primary known cause of connecting rod bearing wear and sudden engine seizure—Hyundai corporate (case #xxx) is refusing to evaluate the vehicle under these warranties. They have improperly classified my claim as a denied "goodwill" request and are refusing to perform a connecting rod bearing clearance test to determine if the bearings have been damaged by this starvation. Because Hyundai refuses to perform the required diagnostic safety protocols, the vehicle must be driven in an oil-starved condition. This poses an imminent and severe safety risk of sudden engine seizure, stalling, and complete loss of motive power at highway speeds without warning, which could result in a catastrophic crash. The manufacturer is ignoring their own failure thresholds and putting driver safety at risk. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

My 2024 Hyundai Santa Fe (VIN: [xxx] ) was manufactured on March 14, 2024, in [xxx] . The vehicle is currently experiencing dual-clutch transmission (8dct) juddering, shuddering, and extreme hesitation when trying to accelerate from a complete stop at traffic lights and intersections. This creates a severe lag in acceleration, leaving the vehicle dangerously exposed to oncoming traffic. This component failure directly mirrors the mechanical hazards outlined in NHTSA safety recall 263. Because my manufacturing date falls just outside the official recall window, this vehicle has not received a formal recall remedy, yet it actively exhibits the identical, dangerous powertrain defects, suggesting the recall's production scope may be too narrow. Furthermore, in November 2024, the vehicle suffered a catastrophic safety failure where it completely lost all propulsion power for approximately 30 seconds while moving through the middle of a live intersection. Most recently, on xxx, right after being released from an extended 38-day service stay at an authorized dealership, the electronic infotainment displayed an active warning screen stating the car should be shifted to park while the vehicle shifter was physically and securely locked in park. Time-stamped video evidence of this active transmission/braking sensor failure has been captured and preserved. The vehicle remains an active, uncorrected threat to my physical safety on the road. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

We have had several transmission issues with this vehicle for over a year. On March 5th we dropped the car off for an oil leak, a malfunctioning middle row seat belt, and an on going transmission clunk and roll. The dealer repaired the oil leak, replaced the seat belt, (damaged the interior of the vehicle while doing so, then denied it) and said they were unable to replicate the transmission problem. The car went back to the dealer again on March 26 for the transmission clunk and roll. They kept it for 8 weeks, and said they couldn’t replicate the issue. I have confirmation that they didn’t even start the vehicle for 4 weeks. We picked up the vehicle on may 22, and the issue persists. Yesterday, when pulling out of a gas station, the vehicle accelerated on its own until I intervened stepping on the brake pedal. When I typed in the issue to google, I was made aware that the vehicle now has a front seat belt safety recall from April 6, which the dealer didn’t even advise us on or offer to repair. I am finding out about this on an interstate family drive and we are of course terrified of driving our vehicle now, based on the unintended accessories and now faulty front seat seat belts. I have asked Hyundai serval times for a buy back which they have refused. Corporate has asked us to bring the car back to the dealer this week, and we are about to sign papers with a lemon law lawyer tomorrow. I wanted to at least file this complaint so that it is in writing should something happen to us in our travels this week. This has all been so unacceptable with Hyundai. We bought this car new and it is paid off.

Vehicle: 2022 Hyundai Santa Fe | current mileage: 140,000 description of safety defect: while operating a 2022 Hyundai Santa Fe at speed, the vehicle suffered a sudden, complete, and catastrophic loss of motive power in the middle of a live, active roadway without any prior warning or dashboard indicator lights. The transmission abruptly dropped out of gear and the engine shut down entirely, trapping the driver and three young children in active traffic and creating an immediate, life-threatening highway safety hazard. The vehicle was towed to sport durst Hyundai in durham, nc, where technicians confirmed a total internal transmission failure where the gears fail to engage. This exact mechanical failure mechanism directly mirrors the severe engineering defect detailed in NHTSA campaign number 22v746000 (Hyundai safety recall 236) for electric oil pump failures causing a sudden loss of drive power. Hyundai motor America corporate case management has issued a flat denial of all safety and goodwill repair coverage based strictly on the vehicle's 140,000 miles, claiming that mileage absolves them of product liability for a catastrophic drivetrain safety defect that endangered three young children. Furthermore, the franchise dealership is actively withholding the gds diagnostic failure scan codes from the consumer, calling them "internal documents" to actively suppress federal evidence of this safety failure. Further, the authorized Hyundai dealership engaged in deceptive practices by refusing to put anything in writing, and refusing my request for any diagnostic information, including any report indicating diagnostic error codes, technician summary, etc.

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.

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Hyundai corporate is refusing to ground or provide alternative transportation for a documented, warranty-covered engine cooling fault (code p2181), creating a highway stalling risk. Hyundai's legal compliance team reviews these logs daily.

The vehicle has experienced repeated transmission-related failures beginning at approximately 5,000 miles. The dashboard warning “transmission system error – check transmission oil immediately” first appeared while driving and was accompanied by sudden loss of power. When this occurs, the vehicle loses acceleration and drivability while in motion, creating a safety risk in traffic. The only way to temporarily clear the warning is to pull over, shut the vehicle off, and restart it. Photographs of the warning message were documented at approximately 6,738 miles on [xxx] and again at approximately 12,664 miles on [xxx]. The vehicle was returned to the selling dealer in massachusetts multiple times for the same issue. During the first visit, the dealer drove the vehicle approximately 19 miles but stated they could not duplicate the problem. During the second visit on or about 3/25/2025, the dealer kept the vehicle for approximately six days while providing a loaner vehicle, but again stated they could not duplicate the condition. The vehicle was later inspected by another Hyundai dealer in new hampshire on 8/19/2025 for the same dashboard warning and loss of power condition while driving. That dealer found the transmission fluid level below specification but stated they could not duplicate the warning message during inspection. Following that visit, the transmission warning did not reappear until [xxx], when the same “transmission system error – check transmission oil immediately” warning returned again while driving. On [xxx], the situation escalated into a possible rollaway event. While at an auto detailing facility, the vehicle was reportedly placed in park with the engine running after being repositioned. The operator stated the vehicle indicated it was in park. Moments later, after the operator exited the vehicle, the vehicle moved from its parked position and rolled into a building. The event was documented in writing by the detailing facility. Information redacted pursuant to the freedom of information a.

The contact owns a 2020 Hyundai Santa Fe. The contact stated that he received an unknown service campaign from the manufacturer indicating that a software update for emissions was needed. The vehicle was taken to a dealer where an ecu update was completed and an np001-sc9c2 was installed for the engine and transmission. The contact stated that when his wife drove the vehicle home from the dealer, she noticed that something was wrong with the vehicle but did not specify the failures. The contact stated that the next day, while driving at an undisclosed speed, the vehicle hesitated and shifted improperly, and while depressing the brake, the vehicle accelerated forward. The contact stated that the failure persisted and became more prevalent in the morning after sitting overnight. The vehicle was then taken to the same dealer where a shift engine value reset, transmission value reset, shift adaptations were made (part number 95447-6g200). The vehicle was repaired, but the failure reoccurred the next morning and has persisted every morning thereafter. The manufacturer was notified of the failure and a complaint was filed. The failure mileage was approximately 25,051.

Campaign 9c2 was installed on this vehicle and the now the vehicle is a danger to drive. My wife refuses to drive it as it bucks and jerks as well as the gas mileage has decreased from 35 highway to 28 highway. The fuel trims are way off on cold starts and the transmission now searches for the correct gear. Shifting back and forth. Just a slight touch of the accelerator and the car seems to jump forward which makes stop and go driving almost impossible.

While running errands around town, I noticed my 2023 sante fe 2. 5t was sluggish shifting out of first gear into second. The rpms revved to about 3k before the transmission shifted into 2nd. I didn't notice any problem shifting into 3rd and above. I drove to a gas station for fuel and shut off my car. When I started it and began to drive, I received an immediate warning to take the car to a dealer and the check engine light came on. The car had the same problem getting out of 1st gear at each of the traffic signals I got caught at on my way to the dealership about 2 miles away. The following day, the service department contacted me and determined I needed a new transmission due to the failure of the dual clutch electric high pressure oil pump in the transmission. They submitted a parts request and Hyundai approved a refurbished dct warranty replacement. The transmission only has 50200 miles on it I am second owner but the car was a cpo so I have full warranty coverage. I was given a loaner under Hyundai' warranty provisions. My main concern is that although this vehicle is a 2023 sante fe, it was put in service around August of 2022 and would therefore have the same transmission as the 2021 and 2022s covered under Hyundai recall 236, but this has yet to be acknowledged as far as I know. Please investigate my situation and consider further requirements of Hyundai! sincerely, [xxx] information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

The contact owns a 2025 Hyundai Santa Fe. The contact stated that while driving approximately 65 mph, the vehicle unexpectedly decelerated to 25 mph with a “vehicle will shut down” warning message displayed. The contact stated that the engine then began to shut down, and although the accelerator pedal was depressed, the vehicle failed to accelerate and stalled. The failure occurred on multiple occasions, requiring the vehicle to be towed each time. The vehicle was towed to the dealer; the vehicle was not diagnosed or repaired and the contact was informed that the failure could not be duplicated. The manufacturer was made aware of the failure and multiple cases were opened, the failure mileage was approximately 3,300.

The contact owns a 2024 Hyundai Santa Fe. The contact stated that while the vehicle was turned on and shifted into park, the vehicle unexpectedly rolled away with no warning light illuminated. The contact stated that the vehicle then collided with a tree. The contact also stated that the air bags did not deploy during the crash. No injuries were sustained, and no medical attention was provided. The vehicle was taken to an independent mechanic where full body repairs were completed. The vehicle was later taken to the dealer; however, the vehicle was not diagnosed or repaired. The contact stated that the failure recurred, and during the second incident the contact’s spouse attempted to stop the vehicle and was almost run over. No injuries were sustained, and no medical attention was provided. The contact stated that the their arms and fingers are hurting during the failure, the contact stated that the vehicle then collided with an area of the contact’s home. The contact stated their concern that there vehicle is very hazardous and very unsafe and the failure could have been worse for the contact's spouse. The manufacturer was made aware of the failure. The failure mileage was approximately 32,000.

After the installation of the service campaign 9c2 engine update, the car now seems to surge or rev up briefly at lower speeds like it can't find the right gear or is trying to briefly accelerate. It doesn't seem to be as noticeable at highway speeds, but in residential or low speeds, it's very noticeable and a little unsettling as the car feels like it wants to briefly lunge forward. No lights are on the dash and there is no indication of any malfunction, but it did not behave this way prior to the 9c2 engine program update. I waited for a couple weeks before contacting Hyundai corporate about this issue because I was hoping maybe the transmission or engine was relearning after a battery disconnection, but it has not gone away.

Component failed: theta ii 2. 4l gdi engine connecting rod bearings. Vehicle has 95,000 miles. Engine available for inspection in [xxx] . Safety risk: engine knock + limp mode at 1500 rpm caused sudden loss of power on highway. Oil consumption 1l/700km risks catastrophic engine seizure while driving. Confirmed by dealer: independent service center confirmed dtc p0010 from metal debris. Hyundai motor America case #42623761 confirmed recall coverage but refuses remedy. Inspection: manufacturer aware via case #42623761. Local Hyundai dealers non-responsive. No police/insurance inspection. Warning symptoms: engine knock started at ~94,000 miles. Check engine light with dtc p0010. Progressive oil consumption. Limp mode activated at 95,000 miles. Hyundai violation: Hyundai confirmed via email they refuse to honor safety recall 162 / service campaign 966 lifetime warranty for VIN [xxx] despite all symptoms matching recall description. Request NHTSA compel Hyundai to authorize bearing clearance test and engine replacement. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

2015 Hyundai Santa Fe limited, 3. 3l lambda ii gdi v6, ~102,000 miles. In December 2022, an authorized Hyundai dealer replaced three specific parts under a Hyundai recall/campaign (records requested). On Sunday [date] at approximately [time] pm, I was driving on [freeway], [state], at 55–70 mph at night. With no prior warning — no warning lights, no chimes, no loss of power buildup, no knocking, no engine protection mode — the engine suddenly and completely died. The failure was instantaneous. There was no limp-home mode and no opportunity to reach the shoulder under engine power. The vehicle lost forward momentum and rolled backward in a live highway travel lane, where it remained stranded until a tow truck recovered it. No injuries. The 12v battery and electrical system remained fully active throughout. The instrument cluster was operational and capable of displaying warnings before the failure. None were displayed. Dashboard warning lights illuminated only seconds after the engine had already died — a post-failure consequence of engine shutdown, not a pre-failure warning. An independent mechanic diagnosed a seized engine due to loss of oil flow. No oil pressure or low-oil light had ever illuminated. The vehicle was then transported to the Hyundai dealer that performed the 2022 service; they promised a diagnostic call and have not provided one or any written diagnostic. This failure mode matches Hyundai TSB 24-em-003h (15yr/150k extended warranty for 3. 3l lambda ii engines in 2013–2019 Santa Fe), NHTSA recall 21v-727 (acknowledging stall risk at highway speed), and the active class action burns v. Hyundai motor company (c. D. Cal. 2025). Hyundai's ksds is documented to trigger a blinking mil, audible chime, and reduced-power engine protection mode upon bearing wear. None of these protective behaviors occurred.

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

When starting the vehicle, a transmission system error occurs because goes away when the car is shut off then restarted. When the error occurs the vehicle does not accelerate properly.

My 2025 Hyundai Santa Fe hybrid awd was serviced under warranty on 4/22/2026 for a driveability concern after experiencing a loss of power while driving. The service history shows part hy35326-2m500 was replaced. On or about 5/25/2026, the same issue occurred again while driving at highway speed. The vehicle suddenly lost motive power and dropped from approximately 70 mph to approximately 30 to 40 mph, creating a serious safety risk because the vehicle could not maintain speed with surrounding highway traffic. No warning lamps, dashboard messages, or diagnostic codes appeared during the failure. The vehicle is currently at a Hyundai dealership for inspection and repair for the repeat issue and should be available for inspection upon request. The prior dealer record appears to describe the issue generally as a “driveability concern,” but the current repair diagnosis and full repair notes are still pending. It is unknown whether the dealer has reproduced or confirmed the failure during the current visit. I am reporting this as a sudden loss of motive power at highway speed involving the fuel/propulsion system, engine, and/or powertrain.

On April 13, 2026, I arrived home and parked the vehicle, engaging the traditional shifter into the "park" position and turning off the engine. After exiting and standing on the ground to retrieve a purse from the cabin, the vehicle spontaneously and rapidly began reversing. ?as the vehicle gained momentum, I was struck by the driver-side door, which knocked me down and resulted in the vehicle running over me. The vehicle only stopped its rearward movement once it collided with a neighbor's parked car. Only after the vehicle began moving did the horn begin blaring, indicating a delayed rollaway alert. ?this incident resulted in a fractured ankle that required surgical intervention. Despite the traditional shifter being placed in "park" and the engine being off, the vehicle failed to remain stationary, representing a catastrophic failure of the parking pawl or transmission engagement.

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3 times now, I am driving and the vehicle goes into limp mode, the "d" on the dash is flashing but the vehicle sends no codes. The tech said the vehicle can immediately delete the code and they can't fix it if they can't duplicate it. It also hesitates when accelerating and is dangerous to myself, my 4 children and anyone driving around me when it goes into limp mode. There is no code, therefore they say they can't do anything about it.