Two problems related to brake fluid leak have been reported for the 2003 Ford F-150. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Ford F-150 based on all problems reported for the 2003 F-150.
The contact owns a 2003 Ford F-150. While driving approximately 20 mph, the brake pedal traveled to the floor when it was depressed and failed to stop the vehicle. The contact coasted to the side of the road and stopped the vehicle. The contact discovered that there was fluid leaking from underneath the front of the vehicle. The contact also noticed that the end of a flexible hose had excessive rust and was fractured where it was connected to the brake caliper. The contact was able to slowly drive the vehicle to his residence. The vehicle was not taken to the dealer. The manufacturer was not made aware of the failure. The approximate failure mileage was 55,000.
Rear brake line corroded through leaking brake fluid on the ground under the vehicle rendering the brakes inop. Fortunately it didn't occur while driving. This shouldn't happen on a vehicle that was only 7 years old and less than 90,000 miles, to me this is a significant safety issue.