One problem related to brake light on has been reported for the 2010 Ford Flex. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2010 Ford Flex based on all problems reported for the 2010 Flex.
I recently experienced a brake failure on our 2010 Ford Flex. The right rear brake hose failed due to contact with the tire. This resulted in the brake pedal going to the floor and a significant decrease in braking performance. The brake hose failure was the result of improper routing of the brake line that happened when the caliper was replaced. The issue here is that the brake warning light never activated even after the brake pedal went to the floor several times. I have checked the bulb by putting the car in the run position and found that the brake warning light does illuminate at that time. This happened during normal city driving (no heavy traffic, speeds between 0 and 45 mph, stopping at red lights and slowing for turns).