How often should the catalytic converter be replaced?

1 Answers
OSamuel
07/29/25 2:18pm
The catalytic converter should be replaced every 30,000 kilometers of driving, or as specified in the vehicle's maintenance manual. The catalytic converter is installed at the front section of the exhaust pipe, with an oxygen sensor positioned before and after it. The front oxygen sensor primarily measures the oxygen content in the exhaust and sends this data to the ECU (Engine Control Unit), which then adjusts the air-fuel ratio of the engine accordingly. The rear oxygen sensor checks whether the catalytic converter is functioning properly. If the data from both oxygen sensors sent to the ECU are similar, it indicates that the catalytic converter has failed, and a warning light will illuminate on the dashboard.
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