The only passenger in the car when an American citizen was shot and killed by a federal officer in South Texas last year had planned to speak up and contradict the government’s account of the shooting. However, the passenger, Joshua Orta, died in an unrelated car crash over the weekend.
Don’t remove the eSIM, just cut/unplug the antenna.
The car has to function in tunnels and when you drive outside cell service range. Disconnecting the antenna (and putting a dummy load on it if necessary) will make it think it’s just out of signal range, so it shouldn’t refuse to work.