I never thought about it but it is odd car-components are the only thing most people will experience with a "core" charge. Why don't more industries do something similar? Is it just because car ownership and car repair has been such a core (no pun intended) component of American culture? That a system of recycling has been set up?
I was curious about when and where these core charges started. It looks like it was the result of WW2 and the shortage of steel and other materials forcing both the military and civilian manufacturers to turn to recycling and rebuilding parts out of necessity. After the war, the remanufacturing industry was large enough to stand on its own and the concepts stuck around. Some hazardous items like lead acid batteries have legislation helping to enforce the core charges but the rest seem to be market driven.