http://www.detroitnews.com/story/business/autos/ford/2016/10/04/ford-brake-probe/91542602/ Had a low brake fluid warning light come on in my 15' F150 today. Had about two brake applications before the pedal was on the floor with no brakes. Same thing happened to my boss in his 15' yesterday. He already has his fixed and his MC did in fact have the same part number as the 13/14' model years. No warning signs prior to failure as the rear seal blows and it dumps the fluid into the booster. Just a heads up to pull over immediately if the light comes on. Kind of a poor design as the light comes on when its basically game over. Both our trucks are the EB so not limited to the 3.5 mentioned in the article.