Kia and Hyundai are recalling thousands of vehicles in the U.S. because of an issue that could cause fuel tanks to melt.

The recalls affect approximately 250,547 Kia K5 sedans from model years 2021–2024 and 85,043 Hyundai Sonata vehicles from model years 2020–2023, all equipped with 1.6-liter turbocharged engines, the National Highway Traffic Safety Administration (NHTSA) said in notices issued this week.

Both automakers report the issue stems from a purge control system check valve that can wear out over time, causing air to become pressurized in the fuel tank, according to the NHTSA.

KIA ISSUES RECALLS OVER LOOSE PARTS CREATING POSSIBLE ROADWAY HAZARDS, OVER 300K VEHICLES IMPACTED

A view of the Kia K5 during the 2024 LA Auto Show at the Los Angeles Convention Center Nov. 22, 2024, in Los Angeles.  (Josh Lefkowitz/Getty Images / Getty Images)

“If this occurs, the fuel tank may expand and contact the hot exhaust pipe components,” the Kia recall states. “If the vehicle continues to be driven in this condition for a prolonged period, localized melting of the fuel tank may occur, possibly resulting in a fuel leak.”

Owners of affected vehicles will be contacted by Hyundai and Kia with further instructions, the notices state.

OVER 80,000 KIA ELECTRIC, HYBRID VEHICLES RECALLED OVER ISSUES WITH AIRBAGS: NHTSA

A Hyundai Sonata sedan on display during the Seoul Mobility Show in Goyang, South Korea, March 30, 2023. (SeongJoon Cho/Bloomberg via Getty Images / Getty Images)

Dealership technicians will inspect and replace the faulty valve and check the fuel tank for any damage, according to the NHTSA.

Last month, Hyundai similarly announced it was recalling more than 135,000 vehicles that could short circuit during a crash.

HYUNDAI, KIA RECALL OVER 200,000 EVS OVER POTENTIAL POWER ISSUES

Kia and Hyundai dealerships are pictured here.  (iStock / iStock)

In July, Kia issued two recall notices within a week for more than 300,000 vehicles with loose parts near the doors and windows that could fall off and pose a potential hazard to other drivers.

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Kia and Hyundai did not immediately respond to FOX Business’ request for comment.

FOX Business’ Daniella Genovese, Danielle Wallace and Bonny Chu contributed to this report.