What is a common cause of air leaks in braking systems?

Worn-out hoses and fittings are a common cause of air leaks in braking systems due to the critical role that these components play in maintaining the integrity of the air brake system. Over time, hoses can deteriorate due to wear and environmental factors such as heat, moisture, and chemicals, leading to cracks or holes. Fittings can also become loose or corroded, which allows air to escape. This leakage reduces the effectiveness of the air brake system, potentially compromising vehicle safety.

In contrast, while dirty brake pads can affect braking performance, they do not directly cause air leaks in the system. Low brake fluid levels are more related to hydraulic braking systems rather than air brakes, and expired brake warranties do not impact the physical functionality of the braking system but rather pertain to coverage for repairs or replacements. Thus, understanding the importance of maintaining hoses and fittings is crucial for ensuring a properly functioning air brake system.