What type of coolant do you use for a 2006 BMW X3 series?

For a 2006 BMW X3, it's recommended to use BMW's proprietary coolant, which is a mix of ethylene glycol and water, often referred to as "BMW Antifreeze/Coolant." This coolant is typically blue or green in color and is designed to provide optimal protection against corrosion and overheating. Always ensure to follow the manufacturer's specifications for the correct dilution ratio and avoid mixing different types of coolant.