I have a broken navi dvd player and looking to replace it asap. Was wondering if the players are interchangeable from 04-08? Thanks!

 

2004-2006 used the same basic unit, although the part has a different revision number starting in 2005. You *may* be able to put a unit from a 2005 or 2006 into a 2004. The unit used in 2007 and 2008 is completely different from the unit used in 2004-2006.
It may be cheaper just to have yours repaired, even compared to getting one from a junked car or off eBay.