You’ll be surprised, they take snapshots at certain points. In a collision all vehicles will store last 5 or so seconds of data, speed, see if brakes are engaged, stuff like that, it’s all used in collision investigations. There’s not a single car I think that’s doesn’t do this. As I said, it’s in some form, but your vehicle does know if you’ve sped if it has an obd on it.

What do you think basic OBD stuff is? It’s all that information and that’s used to see if anything’s wrong with the vehicle.