I had never bought an extended warranty until I bought a gently used 2012 F350 3 1/2 years ago with only 4,300 miles on it (Ford program truck). I will NEVER buy another extended warranty on anything. The authentic Ford ESP warranty was declined 2 times in less than the past year saying "oh, that part is not covered" in relation to emissions parts. The repairs cost me more than the "warranty" did!