> But no one says the car manufacturers are required to make a car where you can flash the ECU. There’s just no reason for them to block it. Sure there is… if

> But no one says the car manufacturers are required to make a car where you can flash the ECU. There’s just no reason for them to block it. Sure there is… if they are providing warranty on the vehicle then they should definitely block ECU mods, as a customer could flash original firmware back after causing damage. And I imagine you can easily make an engine over-rev or overheat with a modded ECU, perhaps to the point of causing a fire or other catastrophe.