Aftermarket Mazda 3 replacement keys: 25 in-stock listings for model years 2010–2020, including key fobs, smart keys, from $20.70. Common FCC IDs: WAZSKE13D01, BGBX1T478SKE125-01. Match the FCC ID and part number on your current key, or use our free VIN lookup. Keys are not OEM and most need cutting or programming; eligible items can be returned within 90 days.