What is involved in a brake fluid flush?

A brake fluid flush involves replacing old brake fluid with new fluid to ensure the hydraulic braking system functions optimally. Over time, brake fluid can absorb moisture from the air, which can lead to a decrease in boiling point and potentially facilitate corrosion of internal components within the brake system. By flushing out the old fluid and replacing it with fresh fluid, moisture levels are reduced, and the integrity of the brake system is maintained, leading to better braking performance and longevity of the system.

In contrast, simply adding more fluid without draining any out doesn't address the moisture contamination issue and can lead to further deterioration of the fluid's qualities. Checking fluid levels alone doesn't involve any cleaning or replacement, and changing brake pads, while important for braking performance, is a separate maintenance task that does not address the condition of the brake fluid itself. Flushes are crucial for maintaining hydraulic efficiency and ensuring safety in braking operation.