One problem related to brake fluid leak has been reported for the 2004 Ford F-150. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Ford F-150 based on all problems reported for the 2004 F-150.
Master cylinder leaked brake fluid into booster (just like the current investigation on food f150) . Causing sudden loss of braking ability while driving. Nearly caused a wreck. $700 spent on repairs.