Do you not understand what a Faraday Cage is or does? It literally blocks radio frequencies.
Cover the module in a metal screen, block any and all data transmission and reception, without even altering the electronics.
And the vehicle ain't got much other choice but to keep functioning as expected anyways, as it's expected to have signal loss at times anyways.
Edit: If you think losing internet connection is gonna break your vehicle, well God forbid you ever drive through a tunnel...