I was traveling on the freeway and heard a grinding sound and thought something was dragging. I stopped and everything underneath was okay, but then my car wouldn't start and no power to windows etc. I think it is the alternator, how long do they last?
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2005 Ford F-150 Question: how long does an alternator last?
Answer #1DaveJHM May 31, 2011, 00:10Master
An hour to the life of the vehicle.
How's that for a range?
I'm not being funny either - I mean that you could have a faulty alternator out of the box, or you could never need one ever. If this is the original alternator in your 2005 truck, 6 years is not unreasonable. I would strongly recommend a high quality rebuilt unit (like from Ford) to replace the one you have.