Hyundai Santa Fe 2021 — Reported problems

My 2021 Hyundai Santa Fe SE (VIN: [XXX]), with approximately 93,000 miles, has repeatedly experienced a dangerous loss of acceleration while driving at highway speeds of approximately 60 mph. When I press the gas pedal, the vehicle fails to accelerate, making it difficult to merge, pass, or respond safely to traffic. The vehicle does not suddenly slow down, but it will not increase speed when needed. This creates a serious safety risk to me and other motorists. The problem occurs without a check-engine light or advance warning. I have noticed abnormal behavior involving the Idle Stop & Go “A” indicator, which changes between orange and white. Coconut Creek Hyundai, an authorized Hyundai dealership, has inspected the vehicle multiple times. The dealership initially replaced the battery, then diagnosed and replaced the high-pressure fuel pump. The pump was replaced a second time due to a reported issue with the replacement. Software updates or resets were also performed. Despite these repairs, the original acceleration problem continued. The dealership has now diagnosed all four fuel injectors as severely clogged or defective and recommends replacing them. The service advisor stated in writing that the high-pressure fuel pump failure caused the injectors to fail. However, the dealership has not explained why this damage was not identified during earlier repairs or provided assurance that replacing the injectors will resolve the acceleration problem. Hyundai Motor America has been contacted regarding the repairs. The vehicle and dealership service records are available for inspection upon request. Availability of previously removed parts must be confirmed with the dealership. I request that NHTSA investigate this recurring highway acceleration failure as a potential vehicle safety defect. Multiple repair attempts have failed to resolve a condition that could result in a serious accident. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

For approximately the past year, my 2021 Hyundai Santa Fe, currently with about 23,000 miles, has experienced intermittent engine and fuel-system problems. During start-up, the vehicle sometimes makes an abnormal rattling/cranking noise, followed by noticeable engine and vehicle vibration. Warning lights may appear, and on some occasions the engine does not start successfully on the first attempt. When it does start, it may initially run rough. The vehicle has also stalled intermittently and has had repeated incidents where pressing the accelerator produced little to no engine response or acceleration. This creates a serious safety concern because the vehicle may unexpectedly stall, lose power, or fail to accelerate when needed while driving. The vehicle has been at an authorized Hyundai dealership for more than one month. The dealership has been working with Hyundai Tech Line and has replaced or evaluated the low-pressure fuel pump, high-pressure fuel injector, high-pressure fuel pump, MPI/port fuel injector, and valve cover. The latest recommendation is to drain, clean, and refill the fuel tank. Despite these repair attempts, the root cause has not been clearly identified or permanently resolved. I am concerned that the repair process has become trial and error, with additional components being replaced while the underlying safety-related issue remains unresolved. I am also being asked to pay out-of-pocket for some of these unsuccessful repair attempts. The vehicle is currently at the Hyundai dealership and is available for inspection if needed.

The contact owns a 2021 Hyundai Santa Fe. The contact stated that while in reverse(R), the rear-view camera displayed a distorted pixelated image on the screen. The dealer and the manufacturer were notified of the failure and stated that there were no recalls associated with the VIN. Upon investigation, the contact discovered NHTSA Campaign Number: 24V879000 (Back Over Prevention); however, the VIN was not included in the recall. The failure mileage was approximately 40,000.

On September 20, 2026, my 2021 Hyundai Santa Fe Calligraphy suffered sluggish acceleration while operating on a public roadway due to an internal dual-clutch transmission (DCT) failure. The Malfunction indicator light illuminated, and a diagnostic scan revealed stored history code P1C2D03, indicating a total breakdown of the high-pressure electric pump assembly. As of September 21, 2026 the vehicle is currently grounded at an authorized Hyundai dealership under an approved factory warranty repair Prior Authorization (PA) request. However the dealership has issued a written admission of "NO ETA" because the replacement transmission components are on an indefinite national backordered and are no longer being manufactured . Because the vehicle cannot be repaired in a reasonable timeframe due to a severe factory design defect , it remains unresolved.

The contact owned a 2021 Hyundai Santa Fe. The contact stated that while his wife was driving 50 MPH, the vehicle unexpectedly caught on fire. The contact's wife became aware that the radio was inoperable before the failure. Additionally, the contact’s wife’s eyes were irritated, and there was a hot, harsh odor which grew stronger very quickly. The odor was inside the vehicle. The contact stated that the smoke was black, and flames started shooting out from under the hood to consume the vehicle. The vehicle was a total loss. The fire was extinguished by the Murphysboro Fire Department. The Fire Department was unable to determine where the fire had started. There was a Police report filed. The vehicle was towed to an impound lot. The failure mileage was approximately 58,000.

The door to the gas tank is a push door which is temperamental. I can be at the pump and push the door to pop it open and it won't. I'm at the point where I have to pop my gas tank open before I even get to the gas station because to pull up to the pump and not be able to put gas in the tank is a waste of time. There is no lever to flip along side the driver seat because it is a push to open door.. it is available for inspection, however, it is temperamental. I will video it so I have proof as it works and it doesn't work. It has not been inspected by anyone only because if it is a defect in the motor for the door, I want Hyundai to recall it. I have gone on YouTube to see if there are remedies and yes, there are videos on how to open the door in case you cannot push it open. I cannot do this because I'm not ruining the back of my car as there is no compartment to open as shown in the YT video. I am not one to let my tank get down to less than 1/2 tank, especially not now. But why am I worrying about popping the door open when I'm not even at the gas station yet??

My rear back up camera intermitting stops working. I can shift into reverse sometimes and the camera does not come on at all, other times the screen blinks and other times the screen has green lines and glitchy lines. The camera will also come on while I'm DRIVING forward

When i select (R) reverse my camera does not come on. It started as just a flashing screen, but does not come on. It has come on momentarily while I am (D)driving. it has flashed a green screen before.

Fuel door mechanism stops working leaving you unable to add fuel. Is a constant complaint in 2021 Hyundai Santa Fe vehicles. My vehicle's door mechanism as stopped working 53,000 miles as well.

The windshield wipers intermittently stop working. This has been occurring for 2 years and the 5dealership cannot find an issue because they always work when the car is in for service. They also now want to charge a diagnostic fee each time it's in since the car is no longer under warranty

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.

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).

On March 17, 2026, the sunroof of our Hyundai Sante Fe 2021 exploded. The driver and two passengers were not hurt because the sunroof was closed and the liner in place when the explosion took place. The incident occurred on an open country highway on a sunny afternoon with no other vehicles or flying objects sighted.

My 2021 Hyundai Santa Fe (VIN [XXX] ) is experiencing severe engine instability, including rough idling, hesitation upon acceleration, and intermittent stalling. These symptoms align with TSB 26-FL-001H regarding defective GDI fuel injectors. The vehicle has stalled in traffic, creating an immediate risk of a rear-end collision. Despite being within the 100,000-mile Powertrain Warranty, the manufacturer is refusing to perform the required diagnostic tests (GDS Fuel Pressure Drop Test) to identify the leaking injectors. This failure to diagnose a known fuel system defect poses a significant safety risk to the driver and other motorists. The primary safety risk is unexpected engine stalling while the vehicle is in motion or stopped at intersections. Additionally, the loss of power during acceleration prevents the vehicle from safely merging into high-speed traffic, significantly increasing the likelihood of a collision. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Driving down the interstate to work at around 70 MPH at approximately 6:40 AM and the front sunroof exploded upwards. Nothing of impact, just a loud explosion and glass blew upwards. The broken glass is positioned upward. The cover of the sunroof was closed and it was not currently in use. Otherwise, glass could have shattered all over me, causing a wreck. I am an [XXX] veteran, the explosion itself set off my anxiety, but thankfully, I was able to pull the car over without incident. I took pictures of the sunroof and I was able to drive slowly down a smaller highway to the dealership, Mac Grubbs Hyundai in Hattiesburg, MS, where I dropped the car off for repairs. I contacted my insurance company and they picked me up in a rental care from the dealership. There was no warning light, not leaks, or cracks in the sunroof prior to the incident. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

My 2021 Hyundai Santa Fe (VIN starting with 5NM) began experiencing a significant failure of the air conditioning system during its third year of ownership. The vehicle developed a persistent refrigerant leak that now requires annual recharges to remain functional. Multiple inspections suggest the failure is due to a porous evaporator core, a component defect that is increasingly reported by owners of this model year as they reach the 3-to-5-year mark. Despite being a documented manufacturing issue, there is currently no recall or warranty extension for this expensive and vital system. The failure of the AC system in a high-humidity environment like South Florida creates a severe safety hazard: Loss of Visibility: Without a functional AC compressor to dehumidify the cabin air, the interior of the windshield fogs over rapidly and completely during rain. This occurs even when the defroster is set to maximum, as the system cannot remove moisture from the air without refrigerant. Driver Impairment: In extreme Florida heat, the cabin temperatures reach levels that cause heat-related fatigue and stress, compromising the driver’s ability to remain alert and react safely to road conditions. On several occasions during heavy Florida rainstorms, the windshield fogged so severely that I had zero visibility of the road ahead. Because the AC system had leaked its refrigerant, the defroster was unable to clear the glass. I was forced to pull off the highway in dangerous conditions because I could not see other vehicles or lane markings. This defect prevents the vehicle’s primary visibility safety equipment (the defogger) from performing its required function.

First instance at 50-55 mph the transmission violently shook the car when downshifting to accelerate on multiple occasions. Dealership diagnosed the problem as a faulty transmission and replaced it at 44064 miles on March 18, 2025. Second time the car failed to accelerate when merging into traffic while the engine revved very high. Again it was taken to the dealership and the diagnosis was faulty transmission. A second transmission was in stalled at 51331 miles. Second transmission began downshifting hard upon accelerating at highway speeds. Retuned to dealership and diagnoses was faulty fuel injectors and all four were replaced on April 7 at 52960 miles. On April 10, 2026 the car displayed a check engine light after the car began shuttering at highway speeds and was immediately returned to dealership where it’s pending a diagnoses. Failure to safely accelerate when merging make this vehicle a safety risk.

My vehicle loses power on the highway intermittently. I had my car set on cruise control at 55 and with no other vehicle in front of me the speed decreased to 45. It frequently sputters going up hills. My car has had 4 oil leaks.

The contact owns a 2021 Hyundai Santa Fe. The contact stated that the vehicle was repaired under NHTSA Campaign Number: 24V879000 (BACK OVER PREVENTION), but the failure occurred. The contact stated that the back over prevention camera displayed a distorted image or a black screen occasionally while the vehicle was in reverse(R). The failure obstructed the driver's visibility, which prevented the driver from safely operating the vehicle. The dealer was contacted, and the contact was informed that there was no record that the vehicle had been taken to the dealer. The contact found the paperwork provided by the dealer when the recall repair was completed. The vehicle was not taken to the dealer or an independent mechanic for the most recent failure. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was 50,667.

-shift lever in transmutation stopped working so car would go into auto shut off and then would not drive once I took my foot off the break. Would not switch gears or drive. Had to shut car off then turn back on to get it to switch gears. -safety was put at risk majorly. Car did that in 5 lanes of traffic with me and kids in car and couldn’t drive. We almost got hit. -dealership said no issues found until I took it in a second time for the same issue then they said it was the translation shift leaver. -Briggs Kia inspected it -no warnings at all -This happened MULTIPLE times. Put the most current date

My horn stopped working. Not under warranty but I believe it is a safety issue. A replacement horn is not available and not under warranty. Online search revealed this is a common issue

When I try to open the fuel cover it wont' open. I have to lock and unlock my car, sometimes up to 10 times, to get the fuel fill door to open. This eventually is going to leave me stranded somewhere stranded. Some of my same year and model are covered under recall for this issue by when I call Hyundai my VIN is not covered. I would like it to be covered and repaired.

The dealership I bought it from (Vineland Hyundai) I have had trouble with before where they say they fix things and they don’t. Last year there was a recall for the back camera not working. I took it in and supposedly they fixed it. Well, a few months later, the camera does not work at all and the problem issues with it is exactly what the recall says. I contacted the Better Business Bureau and the dealership and even though they have it in the system as completed clearly it was not done or it would not done correctly and right now I have no back camera. They refuse to help. I seriously doubt this was done at all being I’ve had issues with service said they did things before and did not. I even asked Hyundai if I could get this done at a different dealership that is more trustworthy and they refuse to help. I’m hoping you may be able to intervene and have them actually do this recall correctly.

I was about to turn into a 2 lane road and a warning came on my dash, "shifter system malfunction service immediately " my vehicle was in Drive I was unable to move my vehicle, unable to shift into any other gear. It was sudden with no warning or loss of power prior to the warning and loss of movement.

The rearview backup camera system malfunctioned. The camera was replaced under a safety recall on my 2021 Hyundai Santa Fe. Within four days of the recall repair, the camera continued to fail intermittently, displaying a blank/black screen and not providing a rearview image when the vehicle was placed in reverse. The vehicle is available for inspection upon request. I also have video documentation clearly showing the malfunction occurring. The failure of the rearview camera puts me and others at risk because the system is required to provide visibility behind the vehicle when reversing. When the screen goes blank, I cannot see pedestrians, children, vehicles, or objects behind me. This creates a significant risk of a backing collision, especially in parking lots and residential areas. The vehicle was brought back to the dealership four days after the recall repair because the issue continued. The dealer stated they could not duplicate the issue at the time of inspection and are requesting a diagnostic fee to continue evaluation. However, I have video evidence clearly showing the malfunction occurring after the recall repair. The vehicle has been inspected by the dealership that performed the recall repair. It has not been inspected by police or insurance representatives. The manufacturer has not personally inspected it beyond the dealership performing the recall repair. There were no warning lamps. The issue presents intermittently when shifting into reverse, at which time the display screen fails to show the rearview camera image. The issue first appeared prior to the recall repair and continued within four days after the recall component was replaced.

Replaced horns a couple times, after doing research, this seems to be a deeper and ongoing issues with this car ok a larger scale. Horns die out or stop completely, causing multiple replacements.

Vehicle has now had several incidences of completing losing all acceleration power while driving at both high and low speeds, resulting in need to turn on hazards and abruptly pull to side of road. Pushing on gas pedal does nothing and vehicle will even roll backwards if I pull over on a hill and take my foot off the brake. I have to put vehicle in park and turn off. Sometimes I have to restart the vehicle a few times before it will drive forward after putting it back into drive. The vehicle does not lose electrical power and will sometimes display the master warning light on dashboard and other times have no dashboard indicator of a problem. This is an extremely dangerous situation and my VIN is not listed under safety recall 22V-746 despite exhibiting the same behavior. I have contacted my local Hyundai dealership service in past and they recommended a transmission flush which did nothing to alleviate the issue. It is now happening frequently so we are reaching out to the local Hyundai dealer service center again.

Horns stopped working entirely. Car was crossing into my lane and I attempted to honk horn and no sound. No warning lights or messages on dash. Is available for inspection. No inspections conducted currently.

Code P1C2D03 is popping up on my 2021 Hyundai Santa Fe after the dealership "fixed" the recall in 2023. My car is going into limp mode, failing while driving, and unsafe. Dealership and corporate won't help me. The transmission was never replaced with the recall and they are claiming they aren't relatable and can't do anything unless a recall is reopened.

Horns assemblies are Failing repeatedly. Since ownership of the vehicle (2023 and a CPO Platinum Wrap), I have had to replace a single horn, or both horns three times with local Hyundai dealerships. mostly the right horn would fail, then the left. I am currently making efforts to have my vehicle’s horns serviced for the fourth time as they are not working. I have been to my dealership on Dec 16, 2025 & Jan 15, 2026, to have the horns repair to no avail. In December, a diagnosis was performed with no action. Yesterday, one part (horn) was not available, and I was quoted a fee of $400 to perform the task. This is extremely concerning as this is not a consumable part or fluid. This is a required vehicle safety item. There are TSB's for other models in the Hyundai line with similar failure of horns ( TSB's: 24-BE-018H & 25-BE-005H). These failures have not been covered under the Santa Fe line or the other remaining Hyundai models of similar years of production and experiencing like failures of horn assemblies as of this date.

Horn stopped working due to the same issue other Hyundai horns stopped working.

Was coming off an exit on the interstate and started slowing down. My brakes act like they didn’t want to work. Grinding and the pedal was twitching under my foot. The car stopped thankfully, but then all Linda of lights came on the my dash and will not go off. And 3 warning come up!

The contact owns a 2021 Hyundai Santa Fe. The contact stated that while driving approximately 20 MPH, the vehicle experienced hard shifting while attempting to change gears, and the vehicle hesitated, and the check engine warning light illuminated. The vehicle was taken to an independent mechanic, but was not diagnosed or repaired; however, DTC: P1C2D03 was retrieved. The vehicle was then taken to a dealer, where the same diagnostic trouble code was confirmed. The dealer diagnosed that the transmission had failed and needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure, and a case was opened. The approximate failure mileage was 99,700.

Car misfiring symptoms like rough or shaky idle, hesitation and loss of power during acceleration, stumbling, unusual popping/backfiring noises, poor fuel economy, and a lit Check Engine Light. Felt vibrations / heard sputtering sounds, as if the engine skipped a beat, often becoming more noticeable under load or when accelerating. Sometimes, the issue goes away after restarting the engine.

On 1/1/26 while traveling on the highway with no traffic in front of or right of my vehicle the ADAS emergency brakes applied themselves and slowed the vehicle nearly causing my vehicle to be rear ended. Vehicle is available for inspection. Faulty assistance nearly caused a rear end collision along the highway. Not aware of ADAS being tested inspected although multi-point inspection was done 10/2025. No warnings prior to incident.

My transmission failed, even after the #236 recall in 2022. My car was recalled for Recall #236 in 2022. My car was updated and "fixed" and now in 2025 is showing the p1c2d03 code and requiring a new transmission. The same recall, without the fix.The car is in great health and never had issues until I was going 60 miles per hour on a busy highway and it reduced to 26 miles per hour during busy traffic. Causing me to almost get rear-ended multiple times and people swerving off the highway to miss me. My car was not going, even with the gas pedal down. I had no warnings, it happened out of nowhere.

While traveling Interstate 75in Florida en route to Venice Hyundai for routine oil change at 65 mph, vehicle rapidly slowed to 40mph, driver pressing on gas pedal but vehicle would not accelerate( while being tailgated by semi that was flashing warning headlights at me). There was burning smell while this was happening. Pulled onto shoulder and called Hyundai service for assistance tow truck brought me in. Vehicle inspected by Hyundai Venice technicians ran through computer tests all ok, tech drove vehicle not able to reproduce problem. Oil changed tired rotated. Instructions included not able to do any repair because cannot find anything wrong with vehicle please contact us if problem recurs. I have had several conversations with service advisor voicing serious safety concerns regarding driving this vehicle and informing him that what occurred was my car went into failsafe/limp home mode which is what happens when there is serious problems with vehicle and should not be driven till repaired. And cannot repair until computer finds a code signifying problem.

The transmission in my 2021 Hyundai Santa Fe has failed multiple times. The first failure occurred within the first two years of owning the vehicle. The car began jerking, hesitating, and struggling to accelerate, and the check engine light came on. The dealership confirmed a transmission issue and replaced the transmission under warranty. After that replacement, the same symptoms returned, and the transmission had to be replaced a second time, again under warranty. The most recent transmission replacement was only a few weeks ago, and the same symptoms are already returning — the vehicle hesitates, jerks, and occasionally loses power when trying to accelerate. These problems create serious safety concerns, especially when merging onto highways or crossing intersections. The hesitation and loss of power make it unpredictable and unsafe to drive. I have two young children who ride in car seats, and I no longer feel confident that this vehicle is safe for my family. Hyundai service employees have acknowledged that this is a known, recurring issue with this model’s transmission design. However, no permanent fix or recall has been issued, and I have been told to continue replacing the transmission under warranty until the coverage runs out. This approach does not address the underlying safety defect. The issue has been confirmed by Hyundai dealerships multiple times. The check engine light has come on before each failure. I am reporting this because repeated transmission failures that cause hesitation and power loss are a clear safety risk, and Hyundai has not provided a lasting solution.

The contact owns a 2021 Hyundai Santa Fe. The contact stated that while driving at an undisclosed speed, the controls on the steering wheel became inoperable. In addition, the air bag warning light was illuminated. The vehicle was taken to an independent mechanic where it was diagnosed with clock spring failure. The contact was informed that the clock spring needed to be replaced. The vehicle was not repaired. In addition, the contact stated that the Department of Motor Vehicles declined the registration renewal due to the failure. The manufacturer was made aware of the failure, and several cases were filed. In addition, the contact was informed that the repair was not covered under the recall nor special program. The failure mileage was approximately 60,000.

The horn on my 2021 Hyundai Santa Fe has completely stopped working. This is a severe safety hazard. I recently attempted to warn another driver who was drifting into my lane but was unable to, forcing me to swerve and nearly resulting in a head-on collision. The horn failed without any warning. After researching online, I have found that this appears to be a known issue with the Santa Fe model and Hyundai vehicles in general. I am requesting a diagnostic and repair as this is a safety feature failure that could lead to a serious accident. Please let me know if this issue qualifies for a recall. Thank You

The contact owns a 2021 Hyundai Santa Fe. The contact stated that while the vehicle was parked and occupied, a bystander noticed that the glass partition had shattered without impact. The dealer was contacted. The vehicle was taken to the dealer, and the contact was informed that the part replacement was not covered under warranty. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 46,677.

For a few month now the light of ABS have been turning on. At the beginning there was no diagnosis specific, cause kept turning off. Two or three months ago again turn on and gave code of back caliper on the left and was changed. An now yesterday August 5, 2025 the diagnosis its need of change of the SBS module whole.

The car horn stopped working very suddenly, without any prior warning, while I was driving. The car has around 36000 miles on it, so the horn dying out was a surprise. Driving without a functioning horn has also become a safety issue. I have an upcoming appointment with the dealership to diagnose and fix the problem.

I am writing to formally report an issue with my vehicle that I believe may warrant a recall investigation. The issue involves the fuel door, which is failing to open after the car has been turned off. This has occurred repeatedly and is preventing me from refueling the vehicle, posing a significant inconvenience and potential safety concern. Despite ensuring that the vehicle is unlocked and powered down as instructed, the fuel door remains stuck and will not release. This malfunction requires manual intervention or technical assistance each time I need to access the fuel tank, which is not only frustrating but could also become hazardous in certain situations. I would appreciate it if this matter could be reviewed for possible recall consideration or guidance on next steps. Please let me know if additional documentation, including my VIN or service history, is needed.