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Key Fob Repairs You Can Do Yourself Key fobs may be damaged and need to be repaired for many drivers. Replacements can cost hundreds of dollars at a dealership or even more if you go to an auto locksmith. It is recommended to replace the battery first. This is often the easiest and cheapest option. Keyless entry Keyless entry is a great convenience, but if your car's key fob fails to work, it can be a big headache. There are many options to fix it quickly and inexpensively. The first thing you should do is replace the battery. It takes only a few seconds and cost