How to Repair a Mazda 2 Key Fob Many modern cars are equipped with key fobs which can aid you in parking your car in a tight area. It is expensive to replace these keys if they fail. Fortunately, the majority of key fobs can be fixed cheaply at home. You can buy a new battery from a local big-box retailer or at a hardware store. The majority of models need a screwdriver. <
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