What is a common cause of brake fluid leaks?

A common cause of brake fluid leaks is indeed damaged brake lines or worn seals. Brake systems operate under high pressure, and over time, components such as brake lines can corrode or become physically damaged. Worn seals within calipers and master cylinders can also fail, leading to a leak in the brake fluid. When there is a breach in the system, it results in a loss of brake fluid, which can compromise braking performance and safety.

In contrast, excessive brake pad wear primarily affects the friction material's ability to grip the rotor and does not directly cause fluid leaks. Clogged air filters in the brake system is not relevant, as air filters are usually associated with the engine's air intake, not the brake system. Overheated brake rotors can lead to brake fade or other performance issues, but they do not typically cause fluid leaks. Thus, the integrity of brake lines and seals is crucial for maintaining a sealed and efficient brake system, making them the most common source of fluid leaks.