BMW engines are manufactured from a mixture of different metals and composites and are particularly sensitive to the fluids you use. Designed for your BMW cooling system, this antifreeze coolant is 100% nitrate, silicate, phosphate, and amine free, and has had extensive research done to ensure that no unwanted effects like electrolysis occur from conflicting materials. We suggest performing a complete flush of the cooling system every two years to ensure your system is performing at its best.