That was a great read. Thanks for posting. I’ve been dabbling in reverse engineering embedded devices in my spare time. I find these kind of detailed reports on how someone solved a reverse engineering challenge to be fascinating.
How do you know it "is completely offline, that includes Eyesight." I believe this is false. Also, the "repair issue" is concerned with (service bay) RF access to the proprietary sensors and memory attached to the vehicle's computer systems --not necessarily Internet connectivity to them.
Let me rephrase, I meant that those systems, while they may be exposed to the online systems, are not part of the subscription packages in any way - and don't use the internet to operate.
The rest of the car is completely offline, that includes Eyesight.