Thanks Ashman and E320. I never thought of putting it under the passenger carpet. Sounds like a good possibility.

Oh and I didn't want to remove the airbag - just the valence panel under it to see if there was room there to put the Sirius box. (if in fact you can remove only the valence without taking out the airbag) I did see that bolt/screw head way up there accessible through a hole in that panel, but I didn't know it was for the airbag.

Rgds,
Chris W.