I'm looking into purchasing a Crew Cab XE that has the power pack, but for some reason it does not have keyless entry. Does anyone know if the sensor is there and I can just purchase the key pads and program them?

Its probably there if you have power locks. Nissan says the same thing with most Frontier SE models...all you have to do is buy a remote and program it. Its Nissan's way of trying to pretend you need the "whole" system when they sell the truck.

i wouldnt be sure of that the 2 componets required bcm and rf reciever bcm is located next to accerator and rf reciever is on passenger side upper dash behind heater vent white box check first before you buy fobs

How do you program a key fob for a 2004 Nissan Titan.