I have a 2005 A4 1.8T without navigation. It came with XM satellite but I am a Sirius subscriber. If anyone wants to swap modules, let me know.

 

I also want to swap my XM for Sirius. Do you know where the current receiver is located. I hear it is a simple job.
Dan

 

It's in the trunk. I found this fantastic article online and it worked perfectly for me. Took me about 20 minutes.

http://www.audiworld.com/tech/elec121.shtml

BTW - I just went to the dealer and bought a new one - $318.00 plus tax - and am selling my XM on eBay.

 

Might want to check Audiworld. I posted the same question and swapped mine with someone over there.