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Car Key Button Repair A broken car key button can be a hassle. You may need to call an emergency locksmith service that is available 24 hours a day for assistance or purchase a replacement remote. However, you might be in a position to save money by fixing an old key fob rather than replacing it. This is especially true when the problem is due to an old switch or a damaged contact. Battery If the buttons on your key fob don't respond to pressing the buttons, this could be a clear sign that the battery