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Remote Key Fob Repairs You Can Do at Home You may be tempted, when your remote key fob isn't working and you are unable to use it, to take it to a dealership to have it changed. Try a few fixes at your home. Start by replacing the battery. Hardware stores sell flat watch-style batteries that are cheap and easy to find. You can then take a look at the fob that you have purchased and check for buttons that are worn or out of the right place. Dead Battery The key fob is a small electr