What is a common cause of hydraulic brake failure?

Loss of hydraulic pressure is a common cause of hydraulic brake failure because the braking system relies on hydraulic fluid to transfer force from the brake pedal to the brake pads or shoes. If there is a leak in the brake lines, a failure in the master cylinder, or if the brake fluid level is low due to a leak, the hydraulic pressure can be compromised. As a result, pressing the brake pedal will not generate enough force to apply the brakes effectively, leading to brake failure.

While brake fade on long hills can reduce braking effectiveness due to overheating, it does not directly cause the hydraulic system to fail. Improper tire pressure affects vehicle stability and handling but does not influence hydraulic brake functionality. Excessive weight in the vehicle may place additional strain on the braking system and can lead to longer stopping distances, yet it does not inherently lead to a failure of the hydraulic system itself.