Automakers got no choice but to provide their vehicles with a device that would make this goal achievable because most of the cities and states have prescribed a law that concerns restriction of the amount of pollution that would be emitted. Toyota is one of the automakers that have made many refinements to their respective Toyota engines and fuel systems. The development of Toyota catalytic converter was one device that changed gradually the history of emission in the industry. Though, a catalytic converter could not totally annihilate those toxic emissions, large percentage of these harmful elements could be wiped out. Of course, your Toyota catalytic converter should always be functioning properly. Otherwise, you need this to be examined and if need be, replace it with a new set of replacement Toyota catalytic converter.
Replacement could be in the form of toyota aftermarket catalytic converter or OEM toyota catalytic converter. These don't take much with a lot of difference except in costs, so it really wouldn't matter at all which one you would prefer because they usually render the same quality and reliability.