A software defect means newer F-Series, Rangers, and Mavericks may lose trailer-brake function or see exterior lights fail ...

Ford has had a record year of recalls and this is the largest one yet. A software issue can interfere with brakes, brake lights and turn signals raising the risk of a crash.

Ford recalls 4.3 million vehicles over a software problem that could cause trailer brake failure and a loss of exterior lights when towing.

Ford Motor Co. is recalling more than 312,000 vehicles over a defect that could cause drivers to lose power brake assistance while driving, potentially increasing stopping distances and crash risk.