In a former life, I did sales for a custom boat trailer manufacturer. Often times, customers would call in with a complaint about the trailer years after purchase and the boss would say, "Well, that is a 'consumable' item." (Sometimes it was and sometimes... ) The point being that people generally are accepting of things that need to be replaced in a vehicle that are "consumed" in the process of driving it. For instance, gas, oil, tires, brake pads, windshield wipers, batteries, and so forth are things that everyone understands get consumed during the normal course of driving. Timing chains, transmissions, and things like that tend to be a different story. Those are seen as durable items that should last the life of the vehicle. Plus, the repair costs associated with replacing those items can be nearly as much as the value of the vehicle, if not more. In most cases, when an engine seizes people don't just say, "Oh well, time for a new engine, I guess."