What can cause brake fluid to become contaminated?

Brake fluid contamination primarily occurs due to the introduction of moisture and dirt. Over time, brake fluid can absorb moisture from the air, which can lead to a decrease in boiling point and reduced effectiveness of the fluid under high temperatures. Moisture can also promote corrosion within the brake system, potentially damaging components such as calipers and lines. Additionally, dirt can enter the brake fluid system through breaches, such as worn seals or fittings, leading to further degradation of the fluid and the risk of brake system failure. Maintaining clean and uncontaminated brake fluid is crucial for the safe operation of the braking system.