During caliper reassembly, all older rubber parts should be ________.

The process of caliper reassembly involves ensuring that all components are in optimal condition for proper performance and safety. When it comes to older rubber parts, like seals and gaskets, they are critical for maintaining brake fluid integrity and preventing leaks. Over time, rubber can degrade due to heat, exposure to brake fluid, and environmental factors, which compromises their effectiveness.

Replacing these older rubber parts is essential because even minor wear or damage can result in brake failure or reduced braking efficiency. New rubber components provide a secure seal and ensure the braking system operates as intended. Thus, replacing rather than simply cleaning or inspecting older rubber parts is the most reliable approach to guarantee safety and performance in the braking system. Keeping these components in top condition is crucial for vehicle safety and performance on the road.