My voice command button on my Model X quit working Sunday right after leaving a Tesla Chicago meetup; it worked on the way there. I asked one extremely knowledgeable member what he thought. Reboot--done. Ask for service and they could probably do mobile service. Or, it might work again on its own. Yep, we know that one! (Learned a lot in 5 months of ownership!)
So...here is where I am at. The service app said I have to go to a service center and the local SCs (25 or 30 miles away) first available are mid-December. Scrolled thru SC list to see what else is available and accidentally hit one 60 miles away and it had an appointment in 10 days! Feeling 'lucky' I got one that 'soon', I am afraid to cancel and lose it. Tried to call closer SC but we know how easy that is... Called Tesla support and did numerous reboots, power off's, etc. No help. He then said there was another voice button on the touchscreen--but, whoops, that is only on the M3. The call support person said my ECU is throwing hardware errors but really thought mobile service could handle it so he texted the Service Manager at the preferred SC who thought it could be done mobile but had no sooner time than the far SC. Then he texted the far SC Manager and no response. So he left a message to call me and told me I would hear back in 24 hours--I hope.
HOWEVER...
The MX has made me a much more chill driver, but when an Idiot wouldn't move on a green light and kept blocking my right turn, of course I HONKED and said a choice phrase. Was I shocked when my 'choice' voice command displayed on my instrument panel!!! I also learned the display 'edits' choice words!
So I have retested this observation and if you push on the steering wheel to honk horn just left of the voice command button and it works! But there is no way I can honk at will just to use one useful button. SIGH...