That's a great idea, but experience varies all across the board. The only items you have reasonable predictive powers over are the cooling system parts: radiator, heater water valve, hoses, and thermostat. They all last a maximum of eight to ten years (depending on use and temperature) and most start failing like clockwork. Regrettably, the failures are catastrophic. So I replace these whether they "need it or not." All else is so unpredictable that I listen or look for symptoms and then act accordingly.