I'm not familiar with the units at all, but I would assume if it was compatible with 2002-2004 models it would be forward compatible. But since there is nothing I can find online, better safe than...
SIRIUS XM SATELLITE RADIO FORUM
Type: Posts; User: zcurzan
I'm not familiar with the units at all, but I would assume if it was compatible with 2002-2004 models it would be forward compatible. But since there is nothing I can find online, better safe than...
http://www.crutchfield.com/S-6Cf3i09lHzU/App/Product/Item/Main.aspx?I=113SR903
And the Kenwood KDC-MP538U is listed as "satellite radio ready" on it's specs