[Viper512]

The door.

[neffo]

Tesla model 3s (and some other cars) at least have electric door releases, maybe on the same CANbus (or whatever they use in Tesla) loop.

Also highly relevant (hilarious) story on risks of relying on celltower connectivity with Tesla vehicles (Glenn Howerton on the Always Sunny Podcast, starts at 3:45 if link strips time off): https://youtu.be/jxud-F_kMWM?t=225

[Apocryphon]

Lateral thinking puzzle champion right here

[snvzz]

Problem: The door (which is quite large) is blocked by an obstacle, and thus you can't open it.

[userbinator]

Solution: The other door(s).