general problems of the 2021 Hyundai Sonata

Ten problems related to gasoline fuel system have been reported for the 2021 Hyundai Sonata. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2021 Hyundai Sonata based on all problems reported for the 2021 Sonata.

1 Gasoline Fuel System problem

Failure Date: 07/28/2026

The contact owns a 2021 Hyundai Sonata. The contact stated that while driving at an undisclosed speed, the fuel gauge indicated that the tank was half full. The contact stated that the gauge erroneously indicated that the tank was empty, and the check engine warning light was illuminated. The vehicle was driven to the gas station, and while attempting to refuel the vehicle, the fuel did not go into the tank. The vehicle was towed to the residence. The vehicle was later towed to the dealer, where it was diagnosed with a failed fuel system and a failed fuel tank. The contact was informed that the fuel system and fuel tank needed to be replaced. The vehicle was not repaired. The contact was informed that the failure was associated with the unrepaired recall. The contact was informed that the vehicle was a fire risk. In addition, the contact was informed that there was a hole in the fuel tank that caused the fuel to leak out of the fuel tank. The contact was informed that the parts were ordered to repair the vehicle. The contact received notification of NHTSA campaign number: 25v796000 (fuel system, gasoline). The manufacturer was not made aware of the failure. The failure mileage was approximately 50,200.

2 Gasoline Fuel System problem

Failure Date: 07/27/2026

The contact owns a 2021 Hyundai Sonata. The contact received notification of NHTSA campaign number: 25v796000 (fuel system, gasoline); however, the part to do the recall repair was unavailable. The local dealer was contacted, and it was confirmed that the part was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The vehicle was taken to the local dealer, and the contact was informed that the fuel tank was swollen and needed to be replaced. The vehicle was not yet repaired. The failure mileage was 80,484.

3 Gasoline Fuel System problem

Failure Date: 05/18/2026

The contact owns a 2021 Hyundai Sonata. The contact stated while driving at an undisclosed speed, the engine shuddered and the engine stalled. In addition, the engine seized. No warning lights were illuminated. The contact stated that the vehicle was seized in the middle of the road. The contact stated that while attempting to start the vehicle, the vehicle started. The failure reoccurred. The vehicle was towed to the residence. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was made aware of the failure. The failure mileage was approximately 140,000.

4 Gasoline Fuel System problem

Failure Date: 03/19/2026

The contact owns a 2021 Hyundai Sonata. The contact received notification of NHTSA campaign number: 25v796000 (fuel system, gasoline); and the vehicle was taken to the dealer for the recall repair; however, the dealer informed the contact that the vehicle was unrepairable, and there was no further information provided. The manufacturer was made aware of the issue, and a case was filed. The manufacturer informed the contact that the field engineers had reviewed the vehicle and advised that a buyback was the best option. Additionally, the manufacturer offered an 8 percent discount on the purchase of a new vehicle. The contact declined the offer because the vehicle had not experienced a failure, and the vehicle would be paid off after two additional payments.

5 Gasoline Fuel System problem

Failure Date: 03/01/2026

The contact owns a 2021 Hyundai Sonata. The contact stated that while driving at an undisclosed speed, the accelerator pedal was depressed; however, the vehicle failed to accelerate as intended. The vehicle was driven to the shoulder of the road. The contact stated that the fuel level indicated empty, and the low fuel warning light was illuminated. The passenger seated in the rear seat noticed that the rear seat was out of place and that the seat was very hot. The vehicle was refueled prior to the failure. The contact and the other occupants in the vehicle exited the vehicle. The vehicle was towed to the residence. The dealer was made aware of the failure. The contact was informed that the failure was like the failure listed in NHTSA campaign number: 25v796000 (fuel system, gasoline). The contact was unaware of the open recall because a recall notification was not received. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 130,000.

6 Gasoline Fuel System problem

Failure Date: 12/15/2025

The contact owns a 2021 Hyundai Sonata. The contact received notification of NHTSA campaign number: 25v796000 (fuel system, gasoline); however, the part to do the recall repair was not yet available. The contact stated that while driving at an undisclosed speed, the vehicle independently accelerated and decelerated while the accelerator pedal was depressed. The check engine warning light was illuminated. The vehicle was towed to a local dealer where it was diagnosed with an expanded frame due to an expanded fuel tank. The vehicle was deemed too expensive to repair per the local dealer and was towed for a buy-back. The manufacturer was made aware of the failure, but no assistance was provided. The failure mileage was approximately 55,000.

7 Gasoline Fuel System problem

Failure Date: 11/25/2025

The contact owns a 2021 Hyundai Sonata. The contact stated that while driving at an undisclosed speed, the accelerator pedal was depressed; however, the vehicle failed to accelerate as intended. In addition, the contact stated that the vehicle was shaking abnormally. The vehicle was taken to the dealer; however, the contact was informed that the part was not available to repair the vehicle. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The contact received notification of NHTSA campaign number: 25v796000 (fuel system, gasoline); however, the part was not available for the recall repair. The manufacturer was made aware of the failure, and a case was filed. The failure mileage was approximately 92,000.

8 Gasoline Fuel System problem

Failure Date: 11/17/2025

The contact owns a 2021 Hyundai Sonata. The contact received notification of NHTSA campaign number: 25v796000 (fuel system, gasoline); however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure.

9 Gasoline Fuel System problem

Failure Date: 08/01/2024

The contact owns a 2021 Hyundai Sonata. While driving at various speeds, the vehicle unexpectedly shut off without warning. There was an abnormal popping sound coming from the vehicle with an abnormally strong fuel odor inside the vehicle. The contact stated that the vehicle was consuming an excessive amount of fuel. The contact received notification of NHTSA campaign number: 25v796000 (fuel system, gasoline); however, the part to do the recall repair was not yet available. The local dealer and the manufacturer were not notified of the failure. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The failure mileage was approximately 70,000.

10 Gasoline Fuel System problem

Failure Date: 03/14/2022

The contact owns a 2021 Hyundai Sonata. The contact stated while driving at various speeds, he smelled an abnormally strong fuel odor inside the vehicle. There were no warning lights illuminated. The vehicle was taken to the dealer who informed the contact that they could duplicate the failure. The vehicle was then taken to a second dealer, wayne Hyundai parts and service (1244 NJ-23, wayne, NJ 07470) who could not duplicate the failure. The failure persisted. The contact stated that after driving the vehicle, his entire body had a strong fuel odor. The manufacturer was notified of the failure and referred the contact to another dealer. The vehicle was not diagnosed or repaired. The failure mileage was approximately 21,000.


Other Gasoline Fuel System related problems of the 2021 Hyundai Sonata

Gasoline Fuel System problems
10
Fuel Injector problems
1
Fuel Pump problems
1

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