This listing is for Item Description OEM right hand front window regulator to suit W639 Vito / Viano LH also available please ask

A window regulator in a car plays a crucial role in controlling the movement of the window glass. It is a mechanical device that helps raise or lower the window, allowing for proper ventilation and access to the outside environment. The window regulator consists of various components, including a motor or a hand crank, gears, and arms.

When activated, the window regulator converts the rotational motion of the motor or the crank into linear motion. This linear motion is then transferred to the window glass through the arms and tracks, enabling the window to slide up or down smoothly. The window regulator ensures that the window glass stays securely in place and operates in conjunction with other safety features of the car, such as the power lock and master switch controls.