Which routine maintenance task is essential for preventing brake failure?

Inspecting brake pads and fluid is a crucial routine maintenance task in preventing brake failure because these components are integral to the braking system's functionality. Brake pads wear down over time due to friction, and if they are not checked regularly, they could become too thin, reducing their effectiveness and leading to longer stopping distances or complete brake failure. Additionally, checking brake fluid levels is vital since the hydraulic brake system relies on fluid to transmit force from the brake pedal to the brakes themselves. Low brake fluid can indicate leaks or other issues that might compromise braking performance.

While checking tire alignment is important for overall vehicle safety and handling, and maintaining a clean engine or washing the truck contributes to the truck's general upkeep, none of these tasks directly prevent brake failure like inspecting the brake pads and fluid does. This highlights the specific focus on the components that play a direct role in the effectiveness of stopping the vehicle safely.