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Hyundai is recalling 85,043 Sonata sedans because their fuel tanks can actually deform and, in extreme cases, melt if something goes wrong under the car. The recall affects 2020 to 2023 Sonata models equipped with the non-hybrid 1.6-liter turbocharged four-cylinder, while hybrid Sonatas with the 2.0-liter turbocharged powertrain are not affected. At the heart of the problem is a faulty vent control check valve, which can cause compressed air to pressurize the fuel tank. If the tank swells enough, it can leak into nearby exhaust components, posing a serious fire hazard.
The symptoms are not subtle if you know what to look for and pay attention to. Hyundai and federal safety regulators say affected owners may hear a bang from the back of the car as the tank deforms, smell fuel around the vehicle, see a warning light illuminate or even experience a no-start condition if the system is unhappy enough. To date, Hyundai has recorded seven cases of fuel tank leaks related to this defect in the US and Canada, but fortunately no accidents, injuries or fires have been reported.
If this sounds familiar, it should be. As we recently reported, Kia has issued a nearly identical recall for more than 250,000 K5 sedans due to the same defect in the purge control system check valve, which can also cause these cars’ tanks to swell and melt. The Hyundai Sonata and Kia K5 are based on the same N3 platform and share the 1.6-liter turbocharged engine. Therefore, it is not surprising that both sedans are withdrawn for the same solution. Together, the two recalls have covered more than 335,000 cars that could be at risk if the problem is ignored.
For Sonata owners, the next steps are straightforward. Hyundai will notify owners by mail beginning January 16, 2026, instructing them to schedule a visit to a dealer. Technicians will inspect the vent control check valve and replace it with an updated part if necessary, inspect the fuel tank and surrounding components for damage and repair or replace them, and update the engine control module software so that it can better monitor tank pressure in the future. All of this will be done at no cost to owners, and Hyundai will reimburse those who have already paid out of pocket for similar repairs. If you are unsure whether your car is affected, you can enter your VIN number into the recall search tool on the NHTSA website or contact your local Hyundai dealer to confirm.
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Lloyd Tobias is an experienced automotive journalist and passionate enthusiast with over 15 years of experience in the world of cars. Whether it’s exploring the latest advancements in automotive technology or keeping abreast of breaking industry news, Lloyd brings a keen perspective and deep appreciation for all things automotive. In his texts he combines technical understanding with practical enthusiasm, making his contributions both informative and appealing to readers who share his love of driving. When he’s not behind the keyboard or under the hood, Lloyd enjoys test driving the latest models and staying one step ahead in an ever-evolving automotive landscape.
