I see here posts of all sorts of ways cars can break, causing the owners no end to the grief. But some cars seem ot have fewer problems. Or they might still have about the same number of problems, but they are less expensive to fix problems. On one car if it overheats, it needs a new thermostat. On another, it overheats, it needs a new head gasket. So I’m wondering why some makes/models seem to be more reliable than others.
Is it the basic materials used that determine of the longitivity of the car? Do the more reliable cars simply use more durable materials?
Or is it more the overall design of the car and the way the parts work together? Do the more reliable cars have a more robust design, making them more fail-safe?
Or is it that the more reliable makes/models go through a more thorough testing process before they are sold to the consumer?
Or is it that the more reliable cars are simply easier to do the routine maintenance and easier to diagnose and fix?
Just curious what the mechanics who work on cars on a daily basis out there think. Any examples of failure modes in unreliable cars that turned out to be more expensive than necessary to diagnose and/or repair because of an inadequate design? For reliable cars, any examples of a failure that was inexpensive to diagnose and repair because of the way the car was designed?