BMW 530i coolant leak from radiator water pump housing tank on BMW 530i

Some BMW 530i owners report experiencing coolant leaks from various components, including the radiator, water pump, expansion tank, and hoses. These leaks can often be attributed to failed parts such as the water pump or damaged hoses. To address minor radiator leaks, some owners find success using radiator sealant, while larger leaks may necessitate a full radiator replacement. Additionally, replacing a faulty water pump and its gasket is a common solution, as is repairing the thermostat housing by replacing the gasket or bolts. Owners are advised to inspect the engine compartment for signs of leaks, such as coolant pools under the vehicle or splattering on engine components. Symptoms indicating a coolant leak may include white smoke from under the hood, frequent coolant refills, high-pitched whining sounds, or visible coolant puddles. Promptly addressing these leaks is crucial to prevent engine damage and avoid costly repairs.