2020 Hyundai Santa Fe Powertrain (other) Problems

Hyundai Motor America & Wallace Hyundai of StuartVEHICLE: 2020 Hyundai Santa Fe (2.4L Theta II GDI Engine)VIN: 5NMS23AD5LH181669INCIDENT MILEAGE: 181,000 MiHYUNDAI CASE NUMBER: 42981944SECTION 1: CATASTROPHIC INTERSTATE SAFETY INCIDENTOn July 16, 2026, while navigating heavy, high-speed traffic on Interstate 95 (I-95) at approximately 80 to 85 MPH, my vehicle suffered an un-commanded, catastrophic mechanical engine seizure. The vehicle instantly dropped from highway speeds down to a 21 MPH "limp mode," creating an immediate multi-car pile-up hazard on a major interstate. Physical inspection immediately after the failure proved that the engine oil level was completely full. The internal components catastrophically failed due to a documented, systemic factory defect involving premature rod bearing failure and oil starvation mechanisms, entirely unrelated to consumer maintenance.SECTION 2: PRIOR SAFETY COMPLAINTS & DOCUMENTED TIMELINEHyundai Motor America has intentionally forced me to operate a known, life-threatening safety hazard for 17 months, during which I drove an additional 31,000 miles under extreme duress. I filed formal oil consumption complaints with Hyundai Corporate every three to four months. I was forced to manually replenish the engine oil every 1,000 miles due to excessive oil loss.Specific safety reports detailing hazardous engine behavior were formally logged with Hyundai on November 25, 2025, and again in April 2026. Rather than remediating the vehicle, Hyundai corporate claims adjusters and dealership supervisors ignored these warning tracks, effectively throwing a consumer out into active traffic in an unsafe, defective vehicle.SECTION 3: AUTOMATIC SHUTDOWN TRAUMA & ACCIDENT RISKThe manufacturing defects caused an intermittent, un-commanded automatic The manufacturing defects caused an intermittent, un-commanded automatic engine shutdown condition. On 5 to 10 separate occasions while stationary at active traffic lights, the vehicle stalled10times

NHTSA ID

11761774

Incident

Jul 16, 2026

My car is consuming an immense amount of oil, the manufacturer recommends oil changes every 7,500 miles, I get an oil change less than 3,000 miles and on my last oil change i was told that there are oil shavings in my oil filter. I just got the SC9C2 update and now my engine is knocking. Car drives super rough and has signs of rod bearing failure. My engine is the Theta II 2.4GDI, a class action lawsuit was filed against Hyundai but my car wasn't included. I don't understand how Hyundai can know about this issue with this engine and not cover replacement. A car should at the very least last for the life of the loan, I am going to end up with no car and still making payments.

NHTSA ID

11760974

Incident

Aug 28, 2026

The contact owns a 2020 Hyundai Santa Fe. The contact stated that while driving at an undisclosed speed, the accelerator pedal was depressed; however, the vehicle failed to accelerate as intended. The contact stated that the vehicle lunged forward. In addition, the vehicle almost stalled. No warning lights were illuminated. The vehicle was taken to the dealer; however, the failure was not duplicated. The contact was informed that no fault codes were displayed. The contact was informed that the issues with the vehicle were just a case of bad luck. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The contact stated that the failure had occurred shortly after the vehicle was repaired under Technical Service Bulletin: 9C2, in May 2026. The manufacturer was made aware of the failure, and a case was filed. The failure mileage was approximately 74,558.

NHTSA ID

11756514

Incident

May 13, 2026

Mileage

74,558 mi

I am currently burning through 2.5 quarts of oil approximately every 800 miles.

NHTSA ID

11751503

Incident

Jul 14, 2026

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.

NHTSA ID

11740021

Incident

May 12, 2026

Mileage

25,051 mi

I was driving on the road and all of the sudden my car went limp and would only move 45 miles per hour. I took it to the dealer which I have lifetime powertran on my car. It has been there for over a month at the dealer. They asked me to provide all oil changes,services, and registrations. I did that and then fidelity asked them to tear down the engine again to see if I had carbon build up. Then after the dealer did that they ask the dealer to tear the motor down even further to see if the exhaust valve was bad and if it was bad they would not replace my motor. My car consumed so much oil that I was changing my oil so often. I have been renting a car just to get back and forth to work. In my contract it says that the exhaust valve is covered under my lifetime powertran. I feel like hyundai and fidelity are giving me the run around. I took very good care of my car and I have shown that. Hyundai has had alot of problem with there motors with the oil consumption and motors just going limp. I feel I will never buy a hyundai again. I am losing money everyday because of the dealer and fidelity. I need the motor replaced and it was no abuse on my part I took care of my car. I want fidelity to tell me how I abuse the exhaust valve. I did my oil changes and took care of my car. I am still paying on my Hyundai and can't afford another car. I have alot of medical bills that I pay. Any help would be great. Sincerely [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11720704

Incident

Jan 29, 2026

Transmission issues with DTC light coming on, dealership did software update which did not resolve the problem. Transmission has rough shift and shuddering. Dealership is recommending complete transmission replacement.

NHTSA ID

11706996

Incident

Nov 20, 2025

2020 SantaFe Limited AWD with ~81200 miles. This is the 3rd or 4th time the P07410 code pops up with the Engine Check light. Hyundai said they found no issues and cleared the code, again. There was once when the code came up and it cleared itself after 50 miles. Not sure exactly what the cause is and Hyundai is saying "there is nothing wrong". Most recent occurrence Sept.4.2025.

NHTSA ID

11706847

Incident

Sep 4, 2025

I had been driving about 1.5 hours when I exited the Interstate and the car engine shut off at a traffic light. When I shifted the car into park and tried to restart the car, smoke filled the cabin. Unbeknownst to me, an oil leak occurred while driving. No warning lights or other indicators that anything was awry. I had the vehicle towed to the nearest Hyundai dealer. Though the suv is under warranty, they say the oil leak was caused by improper oil plug installation at the last oil change. The oil leak caused the motor to seize and the resulting damage is in excess of $10,000. Hyundai says the warranty won't cover this as it is a service issue. Jiffy Lube says their technician did nothing incorrect and they won't take responsibility for the repairs.

NHTSA ID

11703389

Incident

Nov 30, 2025

The contact owns a 2020 Hyundai Santa Fe. The contact stated that while driving at 45 MPH, the check engine warning light illuminated. After scanning the vehicle, the contact received a code for torque converter damage. The vehicle was taken to the local dealer, where it was diagnosed, and the TCM update was needed. The vehicle was repaired, but the failure recurred. The vehicle was taken back to the local dealer, where it was diagnosed with transmission failure. The vehicle was repaired, but the failure persisted. The oil light was illuminated and then turned off. The contact became aware that the engine oil was 4 1/2 quarts low, and it was determined there was an oil consumption issue with the engine. The vehicle was taken back to the local dealer, where it was determined that the transmission needed to be replaced. The vehicle was not repaired. The manufacturer was contacted, and a complaint was filed. The failure mileage was approximately 98,000.

NHTSA ID

11690708

Incident

Sep 9, 2025

Mileage

98,000 mi

Maintenance has been maintained on this SUV. SUV has about 20,000 miles. While at a complete stop at stop light, the SUV jerked a few times and when attempting to drive the accelerator pedal the SUV would not respond. I then put in park then back in drive slow acceleration, was able to pull over. After turning SUV off and waiting a few minutes , turned SUV back on engine light is on. Home is 10min. away, engine light is on and acceleration sucks. By time I park the engine light is off. Wait 2 hrs. drive around the block no light acceleration is off. Dealership is not helpful no engine lights can 0914not tell what is wrong with SUV. Its has been a week no engine light but acceleration still fill off.

NHTSA ID

11688732

Incident

Sep 14, 2025

Driving vehicle at highway speed, engine RPMs dropped to less than 1500, could not maintain any speed, CEL illuminated. As soon as vehicle was pull to side of road, it would no longer run. It would start, idle roughly then stall out. Vehicle was towed to Mountain Hyundai in Denver. High pressure fuel pump failed, fuel pump in one cylinder failed, fuel was dumped into oil fouling all spark plugs. This is the second high pressure fuel pump failure on this vehicle.

NHTSA ID

11665651

Incident

Jun 2, 2025

First of all the transmission locked up at 97,423 miles when I was on my way to work. It took almost a month to get this fixed under warranty. I bought the vehicle in 2021 with 55 miles on it. Now at 164,000 it has to have a new motor. It has burnt more than a quart of oil every week for the last 2 years. I have had it to the dealership multiple times to be checked and never got a response as to why it was burning oil. Then in December of 2024 I was on my way to work and the vehicle was struggling to go. I would push the gas and it would go a little but as soon as I let off the gas it would stop running. Took it to the mechanic recently (due to other issues) and was told that it is only running on 3 cylinders. Also that in order for it to stop burning 2 quarts of oil a week that the pistons needed replaced. Mechanic stated it would be cheaper and better with the other issue to replace the whole motor.

NHTSA ID

11661714

Incident

Dec 17, 2024

High utilization of motor oil. Using 1 quart of oil every 300miles. Hyundai dealership (Gurnee Hyundai-Illinois) completed a "combustion system cleaning" but oil consumption continues unabated. Getting run-around from dealership and manufacturer. I am original owner. Care has 87K miles.

NHTSA ID

11647003

Incident

Jan 14, 2025

La guagua a tenido problemas con el tren delantero. Comenzó con un sonido en el Guía. La Hyundai le reparo esa pieza y luego continuó con el mismo ruido. Ahora tienen que cambiarle el Rack and Piñogn. Mi guagua tiene solo 19,750 millas creo que vino mala de fábrica.

NHTSA ID

11559501

Incident

Jan 23, 2023

The contact owns a 2020 Hyundai Santa Fe. The contact stated while attempting to drive from a complete stop, the accelerator pedal was depressed, but the vehicle failed to respond. The contact stated that he shifted to park(P), turned off, and restarted the vehicle, and the vehicle responded as needed. The contact stated that the failure had recurred 5 times while driving. Additionally, the contact stated that the immobilizer warning light was illuminated. The vehicle was taken to the dealer three times; however, the dealer was unable to duplicate the failure. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure, and a case was opened. The failure mileage was 30,595.

NHTSA ID

11557881

Incident

Dec 23, 2022

Mileage

30,595 mi

The contact owns a 2020 Hyundai Santa Fe. The contact stated while driving out of the driveway, the vehicle unintendedly accelerated at high speed without warning. Additionally, while in traffic, the vehicle started to stall with a delay while accelerating. The contact attempted to shift into reverse however, the vehicle failed to respond with the transmission warning light illuminated. The contact turned off and restarted the vehicle, but the vehicle failed to operate as designed. The vehicle was taken to the dealer who stated that the transmission needed to be replaced. The vehicle was not repaired. The manufacturer was contacted but no assistance was provided. The failure mileage was 35,000.

NHTSA ID

11533639

Incident

Jul 14, 2023

Mileage

35,000 mi

Car stalling and don't move when it's in a complete stop

NHTSA ID

11525859

Incident

Jun 7, 2023

Purchased my 2020 Santa Fe august 1st 2020. Mother’s Day of 2021 I was driving to Menards for a plant. I was going 40 mph on a street and braked too slow down to go on a ramp that was 25mph. Traffic appeared and I was stopped completely. I have the “auto” stop on and it would not start back up. I had to put my car in park, turn it off and turn it back on in the middle of traffic. So scary. And this happens monthly now, since august 2021.

NHTSA ID

11517769

Incident

May 9, 2021

I got flashing check engine light in my 2020 Hyundai Santa Fe 2.0T. My car won’t rev beyond 2000rpm when it happened. Blue link app and car’s infotainment notified of P1326 Error. It is available for inspection. I was turning left in a yield on green light, I was at risk when my car stuttered and won’t rev beyond 2000rpm. I contacted my local dealer, they said they can’t take my car even for diagnosis due to no appointment availability till June 1st week. I was able to get hold of another dealer who can take my car in this Friday itself. Hyundai Roadside assistance said they will only tow vehicle to my local dealer and I would have to pay for tow charges if I go to any other dealer. They can’t provide me loaner car at all. My insurance said they won’t provide rental car unless it is an accident. My vehicle has not been inspected by anyone yet. Based on my initial research there has been class action lawsuit against Hyundai on Theta II 2.0T engines but it only covers till 2019 model. I received flashing check engine light warning in my dashboard and app notification in Bluelink about ECM fault DTC P1326. I was driving vehicle normally without any issues on engine before this happend

NHTSA ID

11512095

Incident

Mar 15, 2023

Vehicle not moving transmisión fail after u turn off the engine it will work again Oil leak by bolt in the oil pan

NHTSA ID

11510047

Incident

Mar 3, 2023

As I was driving on the highway, the engine oil light came on. As I was trying to safely get off highway, the engine light came on. The engine stopped operating, but I was able to coast to a safe spot off highway. Car would not start after that. Towed to dealership. Noticeable oil was on the flat bed. Have not received update on vehicle from the dealership. Car is available for inspection. The safety of me and my family were are risk due to not being able to accelerate on the highway. Oil light came on first. 5 minutes later engine light came on. DTC P123600 appeared in my Hyundai app. Car is owned by me and my wife (Jennifer Reardon)

NHTSA ID

11498717

Incident

Dec 21, 2022

On 07/12/2020 My 2020 SANTA FE Slipped out of park while in garage. It rolled backward until it hit neighbor's porch damaging my tailgate and tail light. It was taken to Hyundai dealership and they said they could not replicate the problem. On about 08/28/22 The next incident was the transmission slipped down into low gear and would not go over 40 MPH. Again the dealer cannot replicate and the car is still at he dealer.

NHTSA ID

11486718

Incident

Sep 27, 2022

NEW 2020 SANTAFE TOOK DELIVERY ON JANUARY 4TH, 2021, WITH LESS THAN 5000 MILES ON MARCH 21ST THE VEHICLE REFUSE TO START AFTER IT WAS STARTED AND SHUT OFF WHILE WE WERE SITTING IN A PARKING LOT. WHILE ATTEMPTING TO START IT GETTING FORWARD COLLUSION WARNING BUT THE ENGINE WOULD NOT CRANK. TOWED TO THE LOCAL DEALER WAS TOLD THEY CANNOT DIAGNOSE THE CAR BECAUSE THEY COULD NOT READ THE ONBOARD COMPUTER, UNABLE TO SAY WHAT'S WRONG. THE CAR WAS TOWED BACK TO THE DEALER WHERE PURCHASE AND WAS TOLD IT WAS A BLOWN FUSE MAYBE LIGHTING STRIKE AND OTHER THEORIES WHAT'S WRONG. THE DEALER WOULD REPLACE THE FUSE AND COMPUTER AFTER 52 DAYS THE CARE IS STILL AT THE DEALER WAITING ON PARTS. TOTAL ELECTRICAL FAILURE WITH NO RECOURSE AT THE MOMENT, HYUNDAI MOTOR OF AMERICA CONSUMER AFFAIRS WANTS US TO SIGN A SETTLEMENT AGREEMENT TO REFUND OUR EXPENSES AND HAVE NOT FIXED OR REPLACED THE CAR. THE MANUFACTURE IS TOTALLY DRAGGING THEIR FEET AND DENYING THE CAR SUFFER A TOTAL ELECTRICAL FAILURE, WHILE THE BATTERY WAS STILL IN WORKING CONDITION ACCORDING TO AAA.

NHTSA ID

11416261

Incident

Mar 21, 2021

Mileage

4,900 mi

THERE ARE THREE ISSUES: 1.) IN SPORT MODE, THE TRANSMISSION WILL SOMETIMES GET STUCK/HUNG IN GEAR (MAYBE GEAR 3 OR GEAR4) AND WILL NOT SHIFT INTO THE NEXT GEAR, EVEN WHEN INCREASING SPEED. 2.) ALSO IN SPORT MODE, AFTER DRIVING FOR ABOUT 10 OR 15 MINUTES THE TRANSMISSION WILL OFTEN SLIP INTO GEAR 5, AFTER REVVING HIGH AND CAN BE HEARD REVVING, BUT IT IS NOT REFLECTED ON THE TACHOMETER, AND THEN WHEN THE GEAR CATCHES IT IS A VIOLET JERK FORWARD. 3.) LASTLY, IN ANY MORE, BUT MOST PRONOUNCED IN "SMART MODE" AFTER TAKING OUT FROM A COMPLETE STOP, AND ESPECIALLY AFTER THE ENGINE GOES INTO AUTO SHUT OFF MODE, THE TRANSMISSION WILL STUTTER AT ABOUT 3 - 5 MPH AND FEELS AS IF POWER HAS BEEN LOST FOR A FEW SECONDS. THIS IS MOST TERRIFYING WHEN MAKING A LEFT TURN INTO TRAFFIC, AS YOU NEVER KNOW IF IT WILL HAPPEN OR NOT.

NHTSA ID

11403919

Incident

Jun 24, 2020

Mileage

2,777 mi