I know what your trying to do....you have the key with the red bit yeah?(transponder in there....)Im guessing you want to do that and not the central locking key fob....You maybe able to find a locksmith that has a tool to read your key and program the new key.....I posted the info for the fob quite some time ago here key fob....on another note you can also buy the fob from a nissan dealer and code it even if you dont have one