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To reset the alarm on a 2009 Mazda6, you have two choices. First, you can open the hood and disconnect the positive battery cable for approximately 30 minutes. This will deplete the power from the CPU, prompting the system to reset the next time it activates. Alternatively, you can remove the specific fuse from the fuse box and wait a similar duration. This method targets only the alarm reset without affecting other systems like pulling the battery would. Just refer to the fuse diagram to identify the correct fuse.
To deactivate the car alarm on a 2009 Mazda 6, you must use the key fob to both lock and unlock the car.