Why does the BMW window move only when the button is pressed and held?

[OSara]

Glass window regulator switch malfunction, damaged lifting motor, or poor contact in the electrical control wiring harness. It is necessary to check whether the fuse is intact, the control switch, and whether the glass window regulator motor is burnt out. In this case, the window regulator needs to be replaced at a 4S shop or auto repair shop. Introduction to one-touch window operation: One-touch window operation refers to a system where the car window glass can be fully raised or lowered with a single press of a button. Generally, mid-to-high-end models are equipped with this feature, mainly for the convenience of the driver and passengers, and to avoid the driver being distracted by operating the windows, thereby improving safety. Window control switch positions: Cars equipped with one-touch window operation have two positions on the window control switch. The first position works like a regular power window—hold the switch to move the window, and release it to stop at the desired position. The second position allows the window to fully open or close automatically with just a single press and release of the button.