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Car Key Button Repair A broken car key is a hassle. You might need to call an emergency locksmith service that is available 24 hours a day for assistance or to purchase a new remote. However, you may be in a position to save money by repairing an old key fob rather than replacing it. This is particularly true if an old switch or damaged contacts are the reason for the issue. Battery If the buttons on the key fob aren't responding to pressing it, that could be a sign that the battery is dying or nearing the end