The Genuine BMW Radiator Support Spacer (1mm) - 51718185150 is a small plastic spacer designed to fit between the radiator support and the frame of a BMW vehicle. It measures 1mm in thickness and is used to provide additional support and stability to the radiator. This spacer is an authentic BMW product and is specifically designed for use in BMW vehicles. It is durable and made to exact specifications, ensuring a perfect fit and reliable performance. This spacer is essential for maintaining the proper alignment and function of the radiator in a BMW vehicle.