BMW-82141467704 Factory recommended BMW coolant BMW coolant is formulated and designed to ensure proper function of your BMW's cooling system. There are thousands of options for coolant on the market but our first recommendation for BMW's is to use Genuine BMW coolant first. It has been formulated specifically for your BMW and is used as the original fill in the factory. This coolant is non diluted, meaning it is 100% strength out of the jug. Recommended a 50/50 mix with distilled/demineralized water for most environments. For colder climates recommended a stronger 60/40 mix to ensure that your cooling system does not freeze.