Aftermarket Subaru Sti replacement keys: 30 in-stock listings for model years 2015–2021, including key fobs, smart keys, transponder keys, from $15.90. Common FCC IDs: CWTWBU766, 2AOKM-SB4, 2AOKM-SB5. 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.