I have a 2004 TSX with navigation and I wanted to install aux input converter. I came across the Soundgate Auxhond3, but the specs state the navigation for "2004-2008 TSX (Must be double-DIN sized satellite-ready radio" I am guessing satellite ready radio means there is a button for XM on the radio, but the 2004 TSX didn't have the option. I am wondering if I can still install the Auxhond3 becuase my guess is the 2004 had the hardware for XM because the 2005 and up TSX have XM button with the same radio. Does anyone know the manufacture and the model number for the navigation unit on TSX?