So it looks like its not so much the sirius unit that is the problem as opposed to the adapter unit. I wonder if once you have the adapter this will fit to any toyota type sirius brain? On the milage side of this car I seems I have been averaging 40+ mpg, yet is looks like I will end up with only 580 miles for my first tank, I think it is a 17 gal. tank so the math doesnt work out right........