Your Volvo is an amazing collaboration of engineering, design, testing, and manufacturing. It also has a multitude of moving parts. These part have their own life-cycles.

Predictive maintenance is a factory-formulated schedule of service and parts replacement to keep your car in the safe zone of operation and safety. Belts are good for so many revolutions, tires for so many miles, brakes for so many pounds of stopping, lubricant for so many hours, etc before they become a performance risk.

Parts wear out. Replace them when you decide, not when they decide.