[reo816]

I have heard these are interchangeable, is that true?

 

[dejablue]

No not with out a lot of electric and ex manifold

 

[reo816]

Meant Xterra 2000-04 engines

 

[JLBinHSV]

I have heard these are interchangeable, is that true?

Easy way to know for sure is to download the EM section of the service manual for each year that interests you, then compare the engines.

http://www.nicoclub.com/FSM/Xterra/