How Many Kilometers to Replace the Catalytic Converter?
1 Answers
After driving 10,000 to 20,000 kilometers, the catalytic converter needs to be replaced. Most modern cars are equipped with catalytic converters, except for some older vehicles produced before the National II emission standard, which may not have them. Lifespan of the Catalytic Converter: The service life of a catalytic converter typically ranges between 80,000 to 100,000 kilometers. The exact lifespan depends on the vehicle's usage conditions, fuel quality, and driving environment. Components of the Catalytic Converter: The catalytic converter generally consists of four parts: the shell, vibration damping layer, substrate, and catalyst coating. The shell is made of stainless steel to prevent oxide scale from peeling off, which could clog the substrate. The vibration damping layer is composed of padding or wire mesh, serving to seal, insulate, and secure the substrate. To protect the substrate from damage caused by vibration or thermal deformation, the padding is made of expanded mica and aluminum silicate fibers, bonded with adhesive. The substrate is constructed from honeycomb-shaped ceramic materials, though many are also made of metal (including stainless steel). The catalyst consists of precious metals like platinum, rhodium, and palladium, sprayed onto the substrate to form the purifying agent.
