Aftermarket Chevrolet Cobalt replacement keys: 19 in-stock listings for model years 2006–2010, including key fobs, transponder keys, from $15.90. Common FCC IDs: KOBGT04A. 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.