How Often Should a Three-Way Catalytic Converter Be Replaced?

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Under normal usage conditions, a three-way catalytic converter does not need to be replaced. Replacement is necessary only if the converter's housing is damaged or particulate matter is emitted from the exhaust tailpipe. Below is more information about three-way catalytic converters: 1. Introduction: The three-way catalytic converter is the most important external purification device installed in a vehicle's exhaust system. It converts harmful gases such as CO, HC, and NOx emitted from vehicle exhaust into harmless carbon dioxide, water, and nitrogen through oxidation and reduction reactions. 2. Structure: The exterior of the three-way catalytic converter is made of double-layer stainless steel plates formed into a cylindrical shape. The interlayer between the double-layer thin plates contains insulating material, such as asbestos fiber felt. Inside, a purifying agent is placed between mesh partitions. The purifying agent consists of a carrier and a catalyst.