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How to Repair Key Fob Issues Key fobs, despite their durability, can wear out or stop working. This can be due to many reasons. The most frequent reason is the battery is dead. Change the battery is an easy fix. Other problems may be more complicated. One possibility is signal interference. It can be caused by the buttons. Battery Your key fob is a pretty tiny and fragile piece of plastic, which is why it is not difficult for things to go wrong. The majority of key fob issues are not complicated or