323 L4-1800cc 1.8L OHC (1991)
Three-Way Catalytic Converter: Description and Operation
Exhaust System
A three-way catalytic converter is used downstream of the exhaust manifold to reduce oxides of nitrogen (NOx) and oxidize hydrocarbons (HC) and
carbon monoxide (CO). The converter contains the catalyst elements platinum, rhodium and palladium which promote oxidation and reduction reactions
at high temperatures. Emissions are converted into carbon dioxide, water vapor and nitrogen.
