The three-way catalytic converter is the key component in the vehicle emission control system, and its main function is to reduce the harmful substances in the vehicle exhaust. The three-way catalyst contains precious metal catalysts, such as platinum, palladium, rhodium, etc., which can promote the oxidation of harmful substances at high temperatures and convert them into harmless carbon dioxide and water vapor. Therefore, the three-way catalytic converter is of great significance for vehicle emission control.

However, due to the high metal content inside the three-way catalytic converter, some illegal traders and repair factories will secretly exchange it or refine it for sale to make profits. According to the survey, the price of an original three-way catalytic converter is often as high as thousands of yuan, or even tens of thousands of yuan. Therefore, the illegal replacement of three-way catalytic converters has become a "way of making money" for some illegal traders and repair factories.

Why do you want to replace the three-way catalytic converter?

1. Huge profit margins

As mentioned earlier, the metal content inside the three-way catalytic converter is high, especially the precious metal catalyst. Some illegal traders and repair shops can obtain huge profits by replacing or refining the three-way catalytic converter. For example, a three-way catalytic converter worth thousands of yuan, after refining and sales, its profits can often reach several times or even tens of times.

2. The owner does not know enough about the three-way catalytic converter

Many owners do not have a deep understanding of auto parts, often think that as long as the vehicle can run normally, the attention of the emission control system is not high. Therefore, when illegal traders and repair shops lure owners to replace the three-way catalytic converter at low prices, many owners will be easily deceived because they do not understand its importance.