Two problems related to brake drum wheel cylinder have been reported for the 2009 Ford Fusion. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2009 Ford Fusion based on all problems reported for the 2009 Fusion.
Break pedal becomes spongy after hitting a pothole. Currently at the dealership they are trying to replace the master break cylinder, but that didn't work. The next move is to replace the mcu. I have read multiple similar reports here to mine. I'm very concerned this is a factory defect that is revealing itself to be dangerous and costly to Ford consumers.
Brake pedal is soft after abs activated resulting in unexpectedly increased stopping distance. I recently had the mast cylinder replaced to fix this, but the problem persists. After several hard pumps of the pedal, it's firmness is restored.