I think it doesn’t comply with U.K. regulations. I had a MG TF and fobs from Canada (and elsewhere) didn’t work in the U.K. and vice versa can’t remember the exact figures but 1 version was 433Hz and the other was 3xxHz. I think it’s a compliance issue since the frequencies used by the US could be used here for different purposes.
My company has an office in the US and there are colleagues (and sometime me) going back and forth quite often. Does anyone know if I order a fob in the US whether it'll work here? What needs to be done to link the fob with the car?
I don't know, however, I believe that Tesla can use triangulation on the 'key' so can detect if it is inside the car or not. I would imagine that, if Tesla acted on the position of the 'key', it could make a relay attack more tricky as the key being spoofed will be outside the vehicle. Just supposition mind you.