Do you have examples of cars (that aren't Teslas, perhaps, since they don't play by normal car rules) having been disabled due to lack of cell service?
Not to avoid the question, because I simply don't know, but do you (or anyone) have directions on how to yank a cell module from a list of cars and still have the car function?
Would be nice to have a page full of forum posts like this for various cars.
Incidentally, this link recommends termination resistors, which I think are the better answer if there's a suitable connector (which I imagine is the case for most cars). If it's not terminated, I believe it can still pick up a nontrivial signal.