One problem related to brake fluid leak has been reported for the 2009 Hyundai Sonata. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2009 Hyundai Sonata based on all problems reported for the 2009 Sonata.
My brake light stop switch broke into pieces with normal use so the brake lights stay on when car is turned off. My front brake hose sprung a fluid leak that made the brakes fully stop working in the middle of a drive. The front brake hose split and cracked prematurely cuasing the brale fluid to empty out. The brake pedal went straight to the floor without stopping the vehicle when this event happened during a drive. My esc light is on big probblem im assuming. My passenger air bag light is on as well both indicate are off and non working.