> It's that simple to "own" a modern car.

On the other hand, it's been a great excuse for a hobby project with 12V relays and learning how to write code for an ESP32. :P

I still haven't yet figured out which CAN-bus to tap and which undocumented byte-messages to interpret... but entering the Konami Code on the steering wheel to unlock the ignition is quite plausible. Or an NFC/RFID tag over a hidden reader, or an active bluetooth connection to my phone, etc.

Whatever the case, quite enough to stop the average thief that would target a cheaper vehicle like my own. You could also skip the ESP32, and have a purely analog switch tucked away.

>but entering the Konami Code on the steering wheel to unlock the ignition is quite plausible.

The left, right, left, right part I can see, but surely up, up, down, down, would be difficult on most steering wheels :)