Can I add Sirius XM to a 2017 Model X (mid year)???
Seems like it should be possible, but as far as I know, Tesla has not offered a retrofit for XM (which is now standard). Next time you're in for service, I'd at least ask. Biggest issue is if the antenna was installed or not. It resides behind the glass, and requires full glass removal to replace it (i.e.expensive). I expect the wiring harness is in place at a minimum as it's usually not worth making a seperate non-XM wiring harness..