A vehicular multi-camera vision system includes a plurality of cameras and an electronic control unit. The cameras are disposed at a vehicle and have respective fields of view exterior of the vehicle. The cameras are operable to capture image data. The ECU includes an image processor and a DC power supply. The cameras are connected with the ECU via respective coaxial cables. Each respective coaxial cable carries (i) captured image data from the respective camera to the ECU, (ii) camera control data from the ECU to the respective camera and (iii) electrical voltage for powering the respective camera. The camera control data is carried by the respective coaxial cable from the ECU to the respective camera by a signal having a frequency outside of the bandwidth of the captured image data carried by the respective coaxial cable from the respective camera to the ECU.