How often do disc brakes need replacing and what factors can affect their lifespan?

Disc brakes typically need replacing every 20,000 to 60,000 miles, but this can vary depending on factors such as driving habits, road conditions, and the quality of the brake components. Factors that can affect their lifespan include frequent hard braking, driving in hilly or mountainous areas, and exposure to harsh weather conditions. Regular maintenance and inspections can help prolong the lifespan of disc brakes.