One problem related to gas recirculation valve (egr valve) has been reported for the 2005 Ford F-150. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2005 Ford F-150 based on all problems reported for the 2005 F-150.
5. 4l, supercrew-- engine was replaced by Ford at 38,000 miles (after complaint to Ford cust svc) due to injector failure and cylinder hydra-lock. Now at 46,000 miles, complete transmission failure. Only used for daily driver, no towing, never off-road. Transmission failed on initial start on 60 degree morning, no pre-failure indicators. Paid $2800 for transmission rebuild. I have noticed a fairly large number of problems reported on sub-standard factory transmission and engine parts on Ford trucks.