What is the lifespan of a catalytic converter in kilometers?

[DiAdriel]

The domestic standard for the lifespan of a catalytic converter is approximately 80,000 to 100,000 kilometers of vehicle travel, while the international standard is generally 160,000 to 200,000 kilometers. The catalytic converter is the most important external purification device installed in the vehicle's exhaust system, converting harmful gases such as CO, HC, and NOx emitted from the vehicle's exhaust into harmless carbon dioxide, water, and nitrogen through oxidation and reduction reactions. The primary mode of failure for catalytic converters is high-temperature deactivation: after the active components sinter at high temperatures, the Al2O3 in the coating transforms into Al2O3, which only causes the catalyst in the converter to fail without affecting the exhaust resistance. As a result, many vehicle owners may not notice the issue until emissions testing or vehicle inspection reveals it.