I don't know how common it is (quite a lot I believe), but in my country (France), you need to provide a certificate of inspection guaranteeing that the car vital systems behave correctly when selling it.
For better or for worse, there are no such mandatory inspections nor certificates required when selling your car in the USA. Its a common trope/issue that people can often get misled by sellers when buying a vehicle, either by the seller clearing the engine codes or some other shady practice that would keep the car looking good until it drives off the lot
I don't know how common it is (quite a lot I believe), but in my country (France), you need to provide a certificate of inspection guaranteeing that the car vital systems behave correctly when selling it.