The Vemo Washer Fluid Level Sensor - V20720479 is a sensor designed to measure the level of washer fluid in a vehicle's washer fluid reservoir. It is manufactured by Vemo and is compatible with various makes and models of vehicles. The sensor sends a signal to the vehicle's dashboard to indicate when the washer fluid level is low, allowing the driver to refill the reservoir as needed. This sensor is an essential component for ensuring the proper functioning of a vehicle's windshield wiper system.