Just make a call to a Jeep Service Dept, or parts Dept. They will be able to tell you.
But from what I know, I think early 05 is where the later Turbo was used. IT went from 110Kw 360Nm, upto 120Kw 400Nm.
Economy is great, you'll love it. I'm planning on getting the DPchip. It takes it to 141Kw 454Nm, and is adjustable upto 510Nm