How Often Should Brake Fluid and Antifreeze Be Replaced in a New Car?
2 Answers
Brake fluid should be replaced every 40,000 kilometers or every 2 years, while antifreeze should be replaced every 2 years or 40,000 kilometers. If suspended particles, sediment, deterioration, or discoloration are observed in the antifreeze, it should be replaced promptly, and the system should be cleaned. Generally, vehicle antifreeze needs to be replaced every 2 years or 40,000 kilometers, but this is only a reference interval. For commercial vehicles with higher mileage, the replacement interval should be shorter. Since driving conditions vary for each vehicle, the replacement schedule should be determined based on actual usage. Monitor the antifreeze's condition—if it is insufficient, top it up promptly. If suspended particles, sediment, deterioration, or discoloration are detected, replace the antifreeze and clean the system immediately. The key indicators for antifreeze are its freezing and boiling points. In the market, antifreeze is available with freezing points of -15°C, -25°C, -30°C, -40°C, etc. It is advisable to choose an antifreeze with a freezing point at least 10°C lower than the lowest temperature in your region. Antifreeze is a coolant with special additives, primarily used in liquid-cooled engine cooling systems. It offers excellent performance in preventing freezing in winter, boiling in summer, and resisting scale and corrosion year-round.
The replacement intervals for brake fluid and coolant in new cars, based on my over a decade of driving experience, are as follows. New car brake fluid is typically replaced every two years or 20,000 kilometers because it absorbs moisture from the air, which lowers its boiling point and can lead to insufficient braking force during emergency stops. For coolant, it depends on the type—standard coolant requires inspection every two years and replacement every 40,000 kilometers, while some long-life versions can last up to five years. It's advisable to check the owner's manual first, as different vehicle types like SUVs or sedans may have varying requirements. Pay attention to the feel of the brake pedal; if it feels too soft or sticky, address it promptly. The first couple of years with a new car are usually fine, but regular maintenance helps avoid major repairs, making driving much safer and more worry-free. Last time I replaced mine on schedule, the braking performance noticeably improved.
