Aftermarket Lexus Rx450H replacement keys: 21 in-stock listings for model years 2010–2021, including key fobs, from $19.90. Common FCC IDs: HYQ14FBB, HYQ14ACX, HYQ14FLB. 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.