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Remote Key Fob Repairs You Can Do at Home If your remote key fob stops working, you may be tempted to visit an establishment to have it reprogrammed. Try some quick fixes in your home. Start by replacing a battery. Hardware stores sell flat-watch-style batteries that are cheap and easy to locate. Look over the key fob to find worn buttons or ones that aren't in place. Dead Battery The key fob, which is a tiny electronic device, makes it simple to lock and unlock your vehicle. It