Whether your windows are power-driven or manually operated, the mechanism responsible for moving them up and down is your BMW 528i window regulator. The 528i window regulator, located in your side door panel, is a series of gears and arms that control the raising and lowering of your windows. In a car equipped with power windows, the BMW 528i window regulator is powered by a small electric motor.

If you have manual windows, the gears of your 528i window regulator are turned by your manual rotation of the window handle. Another function of the BMW 528i window regulator is to keep your windows from being pushed down through pressure on the glass, which is an important safety features.

Problems with the 528i window regulator can occur when the gears and arms become clogged with grit, or through wear from normal use. If your windows become stuck in position, you need to determine whether the problem lies with the BMW 528i window regulator, the window motor, or the fuses or wiring. If you press the window switch and don't hear any noise, the problem is likely with the motor, fuses, or wiring. However, if you hear a grinding or whirring sound and your windows don't move, you probably have a faulty 528i window regulator. You can try removing the door panel and spraying your BMW 528i window regulator with a penetrating lubricant, then letting it set for a few hours. If this does not loosen your 528i window regulator, browse our online catalogue for a high quality replacement BMW 528i window regulator at a great discount price.Your 528i window regulator will be shipped right to your door.