One problem related to rear seat belt has 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.
I have been having a problem with rear-seat seatbelt extenders. The extender provided by our dealer is number f58z-16611c22-a. The problem is that the receptacle on the extender will not latch onto the seat belt unless the extender receptacle is at room temperature or above. We have been trying to get this problem resolved for several months. The parts and service folks at friendly Ford of monroe, michigan claim that nothing can be done about it because, according to Ford motor company, there is no other extender available. They have reordered the extenders several times, thinking that maybe they were defective, but we still have the problem. We have to warm up the extenders in order to get them to work, and even then they will not latch 100 percent of the time. I have also contacted the Ford motor company and they have also told me that nothing can be done.