i hav an 02 Tl-s with standard 6 disc and hav a navi unit...is it a possible swop and is it easy?

 

are you asking about a factory navi unit? or an aftermarket? if its a factory navi unit theres alot more wiring to do to get it to work. i have an aftermarket navi unit in my car and it was fairly simple to put in, a little more work than putting in a regular head unit but not impossible.