The 2021 Hyundai Sonata has 6 recalls, the most serious being multiple fuel system defects that can allow fuel to leak or the fuel tank to melt from contact with hot exhaust components, raising the risk of a fire. One recall affects vehicles with the 2.5L turbocharged engine, where fuel can leak at the connection between the high-pressure fuel pump and fuel rail. A separate issue involves a check valve that can allow air into the fuel tank, causing it to expand and press against hot exhaust parts until it melts and leaks. On the drivetrain side, certain vehicles with an 8-speed dual-clutch transmission can experience a sudden and complete loss of drive power after a transmission oil pump fault triggers a programming error in the fail-safe system, leaving the vehicle without power to the wheels mid-drive. There is also a windshield concern: on some vehicles, the windshield was not properly bonded during manufacturing and can detach in a crash, raising the risk of injury to occupants.