The Vemo Washer Fluid Level Sensor - V20720521 is a sensor designed to detect the level of washer fluid in a vehicle's reservoir. It is a small, electronic device that is typically located near the bottom of the reservoir and uses a float mechanism to measure the fluid level. The sensor sends this information to the vehicle's computer, which then displays the fluid level on the dashboard. This sensor is important for ensuring that the vehicle's windshield can be properly cleaned and maintained. It is a reliable and accurate component that is essential for safe and efficient driving.