There are two types of catalysts in an 1997 Mazda 626 catalytic converter that result in the reduction of emissions. A catalyst is basically a chemical reaction that takes place in the 97 Mazda 626 catalytic converter. There is a reduction catalyst and an oxidation catalyst. Inside the 1997 Mazda 626 catalytic converter, the reduction catalyst happens first. It basically breaks up the nitrogen oxides into a less harmful chemical. The second stage of the 97 Mazda 626 catalytic converter is where the oxidation occurs. It is here that the remaining hydrocarbons are burned off. An 1997 Mazda 626 catalytic converter have two different types of structures, the honeycomb style is the most popular. There is also a control system in the 97 Mazda 626 catalytic converter which tells the car how much oxygen remains in the engine and needs to be burned off.
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