What would cause a catalytic converter to fail after 104000 miles?

A catalytic converter can fail after 104,000 miles due to several factors, including excessive heat from engine misfires or poor fuel combustion, which can damage the internal components. Contamination from oil or coolant leaks can also clog and poison the catalyst. Additionally, physical damage from road debris or corrosion due to environmental exposure may contribute to its deterioration over time. Regular maintenance and addressing engine issues promptly can help prolong its lifespan.