The three-way catalytic converter universal package is an important external purification device installed in the automotive exhaust system. It can convert harmful gases such as CO.HC and NOX emitted from automotive exhaust into harmless carbon dioxide, water, and nitrogen through oxidation and reduction.

Classification of ternary catalytic converters:
Ordinary silent type: The internal carrier of the three-way catalytic converter is not coated with precious metal coating, only loaded in its original position, without exhaust gas detection and fault light off.

Euro III type: The internal carrier of the three-way catalytic converter is coated with precious metals.

Euro 4 OBD type: Most cars after 2008 have an on-board exhaust gas OBD self check system [on-board computer exhaust self check system, if the exhaust gas does not meet the standard, the fault light will light up]. Cars after 2008 need to be equipped with an OBD standard three-way catalytic converter, including extinguishing the fault light.