Aftermarket Lincoln Mkx replacement keys: 21 in-stock listings for model years 2007–2018, including key fobs, from $17.10. Common FCC IDs: CWTWB1U793, M3N5WY8609, M3N-A2C31243300. 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.