I asked my sales rep if the FX shares any body/engine/tranny/etc components with the Murano and he said no. However, all the Infiniti parts sites I've been to seem to sell Nissan parts alongside. I know this is petty but I had a bad experience owning a Datsun 240SX years ago so I'm very sensitive about ever owning another Datsun product. Plus, spending >$45K on a Nissan doesn't sit well. Don't get me wrong, I've only had my FX45 for four days and I can tell that it's going to be my favorite ride next to my Targa.