The car engine electronic radiator fan is installed behind the water tank (near the side of the engine compartment). The electronic cooling fan is activated according to the water temperature and is driven when the water needs to be cooled down, effectively reducing the energy loss of the engine. The electronic cool fan starts and stops automatically depending on the water temperature. When the vehicle is fast, due to the air pressure difference between the front and rear of the vehicle, enough to play the role of the electronic fan to maintain the water temperature at a certain level, the electronic fan can not work at this time. If you would like to purchase an electronic fan assy for the engine cooling of our luxury models, please see below the electronic fan for our Porsche models.