As of March 2015, the most common mechanical complaint about the Ford F-150 truck is a power window that does not roll up, according to CarComplaints.com. More severe complaints include loud clattering or ticking noises coming from the truck's engine.
The 2004 model year of the Ford F-150 has the highest number of repair complaints. The bulk of these complaints are about difficulties with the power window system, most of which are resolved by replacing the power regulator for the window. However, there are a large number of complaints about engine knocking in this model year, some of which eventually lead to replacement of the engine.
Recent model years have had a much lower number of complaints against them as compared to Ford F-150s constructed during the early 2000s, with few complaints about the power window systems noted since 2006. Engine problems remain a common complaint in these more recent models, ranging from loss of power during acceleration to problems with the turbocharger system used in the EcoBoost engines. However, the total number of engine issues reported per year in models over the last five years is 10 percent or less of the number reported for the 2004 Ford F-150.