The Genuine BMW Heating System Circuit Coolant Concentrate is a 1 liter bottle of concentrated coolant designed for use in BMW vehicles. It is specifically formulated to provide efficient heat transfer and protection against corrosion and rust in the heating system circuit. This product is a high-quality coolant that meets the strict standards set by BMW, ensuring optimal performance and longevity of the heating system. It can be used in a variety of BMW models and is an essential component for maintaining the proper functioning of the heating system.