he overall size of the wiring harness is shortened and the total weight is reduced. Compared with the Model S, the Model 3 realizes the wiring harness length is halved – the length of the internal wiring harness of the Model S is up to 3 km, and the length of the Model 3 is only 1.5 km. To achieve such a significant progress, the innovation of the new electrical and electronic architecture is indispensable, among which the innovative regional architecture and the electronic power distribution architecture also play a significant role. It is said that the length of the wiring harness on the Model Y will be controlled at 100 m, but it does not seem to have been confirmed yet. With the development of vehicle electrification, intelligence and autonomous driving technology, the number of sensors, actuators, and various ECUs in the vehicle has begun to explode.