One problem related to warnings 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.
I get a warning message which indicates the the crash sensor is not working on my Ford truck - this component inflates the air bag in the event of a crash. The part number for the crash sensor is motorcraft 6l3z-14b004-aa. I attempted to purchase a replacement crash sensor from a local Ford dealer. I was told that Ford no longer makes this part. The parts manager suggested that I check with local aftermarket parts stores; advance auto parts, autozone, fisher and napa. Nobody makes an aftermarket crash sensor for my vehicle. I also searched amazon without success. I am therefore driving a vehicle with air bags which will not deploy - possibly causing a fatality. It seems like the manufacturer, Ford, should be required to sell replacement crash sensors until they become available as an aftermarket product.