KeylessOption Keyless Entry Remote Fob Emergency Insert Key Uncut Blade Blank No Chip for Nissan Infiniti Smart (Pack of 2) 2 replacement emergency key that slides into the bottom of smart/prox keys. No transponder chips included. This part is compatible with the following vehicles:&lt;BR&gt; These keys needs to be cut prior to using. No programming is required! See product description for a complete list of vehicles this part is compatible with. Replaces CWTWBU735, CWTWBU624, KR55WK49622, CWTWBU619, KR55WK48903, CWTWBU618,KBRTN001 This is a replacement part to match the original in form and function