I have the IceLink Ipod adapter and a 2004 6s wagon. When I hooked it up it didn't work. But I remember seeing on another sellers website that the 2004 (and 2003 i think) has the cicuitry disabled for the CD changer (if it wasn't installed at the factory like mine) and there was a photo of a jumper on the stock radio board that had to be soldered. So, since I already paid for and installed the IceLink, I dove in and took the factory radio apart and found the jumper. I soldered it, put everything back and Viola..success. So, the one seller I found that information from is probably not afraid to tell people what works instead of other sellers just saying that it won't work with '03s and '04s.