2021 Hyundai Sonata Fuel System Problems
12 owner-reported fuel system complaints from NHTSA data
Data sourced from NHTSA public database. For informational purposes only. Always consult a qualified mechanic.
Fuel System Recalls (2)
FUEL SYSTEM, GASOLINE:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS
Hyundai Motor America (Hyundai) is recalling certain 2021-2022 Santa Fe and Sonata vehicles equipped with 2.5L turbocharged engines. Fuel may leak at the pipe connection between the high-pressure fuel pump and fuel rail.
Fix: Dealers will inspect and tighten, or replace the fuel pipe as necessary, free of charge. Owner notification letters were mailed on September 3, 2021. Owners may contact Hyundai customer service at 1-855-371-9460. Hyundai's number for this recall is 207.
FUEL SYSTEM, GASOLINE
Hyundai Motor America (Hyundai) is recalling certain 2020-2023 Sonata vehicles. A damaged check valve can allow air to enter the fuel tank, causing it to expand and contact hot exhaust components, melting the tank.
Fix: Dealers will inspect and replace the check valve. The fuel tank assembly will be inspected for damage and replaced if necessary. Additionally, dealers will inspect and update the engine control unit software. All repairs will be performed as necessary, free of charge. Owner notification letters were mailed beginning March 13, 2026. Owners may contact Hyundai customer service at 1-855-371-9460. Hyundai's number for this recall is 286. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on November 19, 2025.
Owner Complaints (12)
Your 2021 Sonata has fuel system issues related to recall 25V796000, but Hyundai has not provided a remedy and is asking you to pay $1,600 to replace the fuel assembly. Both the dealer and corporate are refusing to cover the repair, and you don't feel safe driving the vehicle. The repair would involve replacing the fuel pump assembly and related fuel system components.
Parts you may need:
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Your 2021 Hyundai Sonata was recalled for a fuel system issue (Campaign 25V796000), and when you took it to the dealer for repair, they said the vehicle couldn't be fixed. Hyundai's engineers reviewed your car and determined it was unrepairable, offering you a buyback with an 8% discount on a new vehicle instead—an offer you declined since your car hasn't actually failed and is nearly paid off. The resolution would likely involve either replacing fuel system components or, in Hyundai's assessment, replacing the entire vehicle.
Parts you may need:
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Your 2021 Sonata's engine lost power while you were driving, even though you pressed the accelerator. The fuel gauge showed empty and the low fuel warning was on, even though you had just refueled. A passenger noticed the rear seat was out of place and very hot. Your vehicle appears to match a known recall issue (Campaign 25V796000) related to the fuel system that you may not have been notified about. This issue likely requires inspection of the fuel system and rear seat area to identify and address the underlying cause.
Parts you may need:
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Your 2021 Hyundai Sonata is subject to a recall (Campaign 25V796000) related to the fuel system, but the replacement part needed to fix it isn't currently available at your dealer. You've been waiting longer than a reasonable amount of time for the repair to be completed, and you've reported this delay to the manufacturer. So far, you haven't experienced any actual fuel system failure.
Parts you may need:
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Your 2021 Sonata is shutting off unexpectedly while driving, and you've noticed a strong fuel smell inside the cabin along with unusual popping sounds from the engine. Your car is also using much more fuel than normal. You've been notified of a recall (Campaign 25V796000) related to the fuel system, but the replacement part isn't available yet from the dealer. The fix will likely involve replacing a faulty fuel system component once the recall part becomes available.
Parts you may need:
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Your car isn't accelerating properly when you press the gas pedal, and it's shaking abnormally while driving. Your dealer informed you about a recall (NHTSA Campaign 25V796000) related to the fuel system, but the necessary parts aren't currently available to complete the repair. The manufacturer is aware of the issue and has opened a case to address it.
Parts you may need:
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You've noticed a strong gas smell in your car and took it to the dealer twice for inspection. While they repaired a cracked cylinder head during the second visit, they couldn't identify the source of the smell and suggested you return if you notice it again while driving. You're concerned about safety, especially when transporting young children, since a persistent gas smell could indicate a fuel leak or fire hazard.
Parts you may need:
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Your 2021 Hyundai Sonata has a fuel pump that was recalled for safety reasons. You took it to the dealer in June 2025 for the recall repair, but as of September 2025, it's been sitting in the shop for over 89 days without being fixed — far longer than the 30-day legal limit in Virginia. You're invoking Virginia's Lemon Law to demand either a full refund or a replacement vehicle.
Parts you may need:
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The car would excelerate while in park. While I was pressing the brakes the car would jerk forward, it would not just quietly idle. While driving the car would randomly speed up or slow down. Sometime it would sound like it was going to shut off and start vibrating.
The contact owns a 2021 Hyundai Sonata. The contact stated while pulling out of a parking lot, the vehicle failed to accelerate as intended and started shaking abnormally. The check engine warning light was illuminated. The vehicle was taken to the residence. The vehicle was towed to an independent mechanic where it was diagnosed that the fuel injector needed to be replaced. The vehicle was towed to a dealer where it was diagnosed that all four fuel injectors needed to be replaced. The vehicle was repaired. The manufacturer was not notified of the failure. The failure mileage was 47,000.
My car barely has 11,000 miles and just the other day it had about 20miles left of gas but as I was driving on the road it started to feel and seem like it was about to die on me, Also the front Wipers are not well restrained with the vehicle you can tell by the way it moves when Wipers are on....Also most of the Signals be It if something is in front of me and the signal goes off BUT THERES NOTHING THERE ...ALSO WHEN IM BACKING UP SOMETIMES the car itself will Force stop as if something is in the way ...BUT AGAIN NOTHING IS THERE AT ALL ...IT HAPPENS EVERY FEW DAYS ....I JUST PURCHASED THIS CAR ..AND REALLY THINKING IT WAS WORST MISTAKE W ALL THESE ISSUES ALREADY
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.