Can BMW Windshield Washer Fluid Be Added Randomly?
2 Answers
BMW windshield washer fluid cannot be added randomly; you must use the specific 3 Series washer fluid available at authorized 4S stores. Below are the detailed functions of windshield washer fluid: 1. Cleaning performance: Windshield washer fluid is formulated with various surfactants and additives. Surfactants typically have wetting, penetrating, and solubilizing functions, thereby achieving cleaning and stain removal effects. 2. Antifreeze performance: It can significantly lower the freezing point of the liquid, providing antifreeze protection and quickly dissolving frost. 3. Anti-fog performance: A single-molecule protective layer forms on the glass surface. This protective film prevents the formation of fog droplets, ensuring the windshield remains clear and transparent with a sharp field of vision. 4. Lubrication performance: Its higher viscosity provides lubrication, reducing friction between the wiper blades and the glass to prevent scratches.
As a frequent BMW driver, I feel that windshield washer fluid can indeed be added casually, but it's not the safest practice. BMW's washer system is precisely designed, and adding low-quality or unsuitable liquids indiscriminately may cause nozzle clogging or damage, especially during cold seasons. If washer fluid without antifreeze is used, the liquid may freeze at high freezing points, affecting cleaning performance or even causing accidents. I recommend choosing reputable, standard windshield washer fluids and adjusting them according to the season—using cleaning-type in summer and antifreeze-type in winter. The process of adding it is simple: open the hood, locate the cap marked with the washer fluid symbol, and pour in an appropriate amount, but avoid overfilling or using tap water, as the minerals in tap water can form scale, which may blur the windshield over time. From a safe driving perspective, regular checks and replacement of washer fluid are essential for clear visibility.
