On certain trucks equipped with a 3.5 L Ecoboost engine, brake fluid could leak from the brake master cylinder into the brake booster. This can cause reduced front brake performance, and the driver may experience increased brake pedal travel and increased pedal effort. Full braking function remains in the rear wheel circuit.
Safety Risk
Reduced front brake performance can cause extended stopping distances and increase the risk of a crash.
Corrective Actions
Ford will notify owners by mail and instruct you to take your truck to a dealer to replace the brake master cylinder. The dealer will also replace the brake booster if the brake master cylinder is leaking.