Use the correct BMW-approved coolant mixture
Keep the coolant level at the proper mark
Replace the coolant on schedule
Bleed the cooling system after any coolant service
Inspect the radiator, hoses, expansion tank, and water pump regularly
Replace any leaking or swollen hoses immediately
Replace the thermostat if it sticks or runs hot
Replace the electric water pump at the first sign of weakness
Clean the radiator and intercooler fins of debris
Make sure the radiator fan operates correctly
Replace the engine oil on time with the correct specification
Keep the oil level within range
Avoid repeated hard pulls when the engine is cold
Allow the engine to warm up before heavy driving
Use a quality oil cooler setup if the car is tuned
Monitor coolant temperature and oil temperature
Address boost leaks and tuning issues that raise heat
Use fresh spark plugs and proper ignition components
Keep the cooling system pressure cap in good condition
Flush the system if contamination or sludge is present
Repair any fault codes related to cooling immediately
Reduce idling in extreme heat when possible
Ensure the auxiliary cooling system is functioning properly
Upgrade the radiator if the car is modified or driven hard
Upgrade the charge-air cooling system if needed
Keep the front bumper openings unobstructed
Check for trapped air after any repair
Use a conservative tune and safe air-fuel ratios
Avoid prolonged high-load driving in hot weather without cooldown
Park in shade when possible
Replace aging plastic cooling components proactively