I believe the keyless entry only comes on the lx and ex, and its part of the factory radio, so the dealership would cost you a ton, but since you already have power locks, you can get an aftermarket keyless entry system installed for pretty cheap. any car audio store, etc. place will sell them and do installs if you want them to, but dont go to the dealership[ because they will have to replace your stereo, and charge you a whole lot more than needed. good luck!