This is what stood out for me

"a whole range of security problems was found, but the biggest failing in his mind only emerged when researchers questioned the carmaker about issues that had arisen during the tear-down.

"We let them know about our assumptions of how the ECUs could be abused and they said, 'This is a black box for us,'" Mr Davis recalls.

"So, they went to the third-party that made it, who said it was proprietary information and we will not tell you."

Its a mad world ?