Compatibility For BMW X3 20122018. Please check the product information and photos carefully before ordering to confirm the side window deflectors fit your car. Material and quality Made from ABS plastic with flexibility and durability; not easy to break. Designed to allow fresh air circulation while keeping rain out, improving ventilation in all weather conditions. Protection and performance Helps prevent rain from entering the cabin when the window is slightly down. Disperses cigarette smoke and reduces air turbulence. Lower wind noise on motorways and during driving, contributing to a more comfortable ride. Key features No tools required; no punching or damage to the car body. Attached by tape; does not require drilling. To install, clean the window surface to remove dust and water, align the deflector, and press into place. Installation and care Clean the window surface, dry it completely. Remove backing from the preapplied tape, align the deflector to the window, and press firmly to secure. Ensure full contact for adhesion and performance. Typical use scenarios Driving in light rain or drizzle with the window slightly open for ventilation while keeping rain out. Long highway drives where reduced wind turbulence and lower cabin noise improve comfort. City driving or parking where cigarette smoke or odors can be dispersed more effectively through improved air circulation.