This high quality 2012 MAZDA3 emergency key will fit your key fob or Smart Key. This emergency key needs to be cut and programmed before it can be used on your car. To cut and program this key, please contact a local automotive locksmith or hardware store. The price for a key cutting service varies depending on your location. This 2012 MAZDA3 emergency key can only be used in an emergency situation. Some functions in the vehicle may stop working properly if the emergency key is used. Please refer to the vehicle manual for more information.