The 2003 Nissan Max will be built on the same plateform as the Infinity Q45.
That is completely wrong. The new Maxima will be based on the Altima platform and built in Smyrna. No word on whether it will be RWD, but my opinion is that it will be FWD with an AWD option. If it were going to be RWD, it would probably be built on the FM platform (G35, 350Z, etc.) and not on the Altima platform.
From a Nissan press release:
"The new Maxima will share a vehicle platform with the Nissan Altima."