A vehicle control system includes a memory, a processor connected to the memory, and a functional section. The functional section is configured by a first device and a second device having equivalent functionality to each other, and the functional section is connected in a communicable manner to the processor which serves as a driving assistance control section configured to perform driving assistance including at least braking control of a vehicle, and services as an autonomous driving control section configured to perform autonomous driving of the vehicle. The processor is configured to use the first device at least during execution of driving assistance of the vehicle, and to use the second device at least during execution of autonomous driving of the vehicle.