I don't think it will work on any 9-3 after 2003. Starting late 2003 (?), SAAB completely changed the wiring and other stuff on 9-3s. I think starting MY 2006, 9-3's had an OEM option to add AUX input.
2001 9-5 SE V6; 2006 9-5 Wagon; iOS; BlueSaab version = "latest and greatest" :)