A catalytic converter is a vital part of a vehicle emissions control system. It is designed to convert harmful engine emissions to CO2 and water. Learn more about how a catalytic converter works as well as the anatomy of a typical converter.

There are three types of catalytic converters: two-way converters, three-way plus air catalytic converters, and three-way converters. For the most part, each of these different converters came about because of emission regulations. Here is a summary of the catalytic converter evolution.

A catalytic converter has no moving parts. A converter cannot "wear out", but can become inert because of the accumulation of deposits, or through the physical damage caused by impact or overheating (misfire or fuel control faults).

Additional EPA converter information: EPA installation requirements, selecting a universal catalytic converter , and Engine Family Number (EFN) location.

Additional CARB converter information: CARB installation requirements and Engine Family Number (EFN) location.

Find immediate answers to our most frequently asked questions about emissions and catalytic converters.