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.
Many cars have something similar (remove SIM card, cut antenna) that allows them to keep working without connectivity