I just went thru this this week with my 2014 with the base touchscreen headunit. Local stereo place couldn't get their Sirius kit to work with it....headunit just didn't have a way for a satellite input to work.
So I took it to the dealer, they said they had a kit (looked just the the pieces that the stereo place had) that they said some other dealerships had gotten to work. After a day's work... no-go. Dealership ended up contacting the place that had told them it would work and...oh, sorry, we were wrong....the base touchscreen unit on the 2014 frs will not accept a satellite input. End of story. Just will not work with this unit.
Oh, they could put in a 2013 frs unit (non-touchscreen) that would take satellite, but it would still cost $400 for the kit and about $300 for installation. Or they could install a BeSpoke (big $). For less than that price I can get an aftermarket Pioneer that will work with satellite.
So now I'm left with either doing without, adding a satellite antenna and hooking my old Sirius Starmate into the aux plug, or getting an aftermarket headunit.
Can't understand why they would upgrade the headunit from '13 to a touchscreen for '14, but downgrade the flexibility of it to accept satellite. Stupid.