How often should the coolant be replaced in a BMW X3?
2 Answers
BMW X3 coolant should be replaced every two years or 60,000 kilometers. Coolant prevents the radiator from cracking and the engine cylinder block from freezing due to coolant solidification when parked in cold winter. The functions of coolant and precautions for replacing coolant are as follows: Functions of coolant: Coolant is a special additive-containing liquid mainly used in liquid-cooled engine cooling systems. It provides antifreeze protection in winter, anti-boil protection in summer, and year-round anti-scale and anti-corrosion effects, ensuring the engine operates within the normal temperature range. Precautions for replacing coolant: Never mix different types of coolant. Mixing different models of coolant can easily cause chemical reactions, sedimentation, or bubble formation, which can significantly affect the coolant's anti-corrosion, anti-scale, anti-boil, antifreeze, and anti-rust properties.
As a BMW X3 owner for several years, I recommend changing the coolant every two years or checking/replacing it every 40,000 to 50,000 kilometers. My car has gone through this process several times, and the dealership always reminds me during maintenance. Not changing the coolant on time can lead to scale buildup and rust in the cooling system, causing engine overheating or pipe leaks. This could result in breakdowns during long trips, with repair costs starting from thousands of yuan. I personally check the coolant level and color every month. If I notice the level is low or the fluid appears cloudy, I address it immediately. Using genuine BMW coolant is the most hassle-free option—it offers good compatibility and isn’t expensive. Regular maintenance extends the car’s lifespan and ensures peace of mind when driving in winter. After all, safety comes first.
