The general recommendation is to change brake fluid every 2 to 3 years or around every 24,000 to 45,000 miles, depending on the vehicle manufacturer's guidelines. Many manufacturers advise changing brake fluid every 2 years regardless of mileage because brake fluid absorbs moisture over time, which degrades its effectiveness and can harm the braking system. Some recommend checking or changing it more frequently under heavy or humid driving conditions. Visual inspection is also useful; if the brake fluid appears dark or contaminated, it should be changed even if it hasn't reached the recommended interval yet. Most mechanics suggest including brake fluid checks as part of routine vehicle maintenance, such as oil changes, to maintain safe braking performance.
