2020 Hyundai Sonata Fuel System Problems
Fuel System complaints account for 57 of 178 total complaints (32%) filed on the 2020 Hyundai Sonata, the highest share of any model year. NHTSA has an open recall (25V796000) for a damaged check valve that lets the fuel tank expand and contact hot exhaust parts. Median mileage at failure is 77,524.
- Fuel System complaints
- 57
- 32% of 178
- Crashes reported
- 2
- Fires reported
- 1
- Injuries reported
- 1
- Median mileage
- 77,524 mi
- Related recalls
- 1
Typical fuel system symptoms owners report
- Fuel tank expands under the back seat, pushing the seat up and sometimes scraping the muffler on the ground.
- Drivers report a loud popping noise from the rear of the car followed by a smell of gasoline.
- Vehicle stalls or hesitates at stops and intersections, requiring repeated restart attempts.
- Check engine light comes on tied to a fuel tank pressure sensor, sometimes replaced without fixing the underlying issue.
- Fuel gauge reading drops suddenly then climbs back up, accompanied by sluggish driving and a check engine light.
- Sudden loss of acceleration while driving at highway speed, forcing the driver off the road.
When 2020 Hyundai Sonata fuel system complaints were filed
First complaint Nov 27, 2020, latest Jul 30, 2026.
Fuel System recalls for the 2020 Hyundai Sonata
- NHTSA 25V796000Nov 17, 2025Fuel System85,043 vehicles
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.
Risk: A melted fuel tank can leak, increasing the risk of a fire.
Remedy: 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.
Fuel System complaints by Sonata model year
Raw complaint counts per model year; newer years have had less time to accumulate complaints.
Frequently asked questions
- Are there fuel system problems with the 2020 Hyundai Sonata?
- Yes. NHTSA lists 57 Fuel System complaints for the 2020 Sonata, which is 32% of all 178 complaints filed for that year, the highest share of any Sonata model year in the data.
- Is there a recall for the 2020 Hyundai Sonata fuel tank?
- Yes. Recall 25V796000 covers 2020-2023 Sonata vehicles for a damaged check valve that can let air into the fuel tank, causing it to expand and contact hot exhaust components and melt the tank. The remedy is inspection and replacement of the check valve and, if damaged, the fuel tank assembly.
- At what mileage do 2020 Sonata fuel system problems usually happen?
- NHTSA data shows a median mileage of 77,524 miles at failure for Fuel System complaints on the 2020 Sonata.
- How serious are the fuel system complaints on the 2020 Sonata?
- Among the 57 Fuel System complaints, NHTSA records 2 crashes, 1 fire, and 1 injury linked to this component.
- How does 2020 compare to other Sonata years for fuel system complaints?
- 2020 has a 32% share of complaints tied to the Fuel System, higher than 2021 (26%), 2022 (30%), and lower than 2023 (51%), which also falls under the same recall.