I was told by ggarb that my 2004 and 2005 prius' are both gen4 and I should always buy the nav discs with the red dots on them, this is confirmed by my personal research. so I just bought a couple of new discs 11.1 with the red dots, I went to remove the old one from my 2004 and it is a w41 4.2 with GREEN DOTS!!! Obviously I'm scared to put the new disc with red dots in as I'm a little worried about a compatibility issue and irreversible damage, immediate knowledgable assitance would be greatly appreciated!!! door tag says my 04 was manufactured in march of 04
