How Often Should the Catalytic Converter Be Replaced?

[AaronRose]

The catalytic converter should be replaced every 10,000 to 20,000 kilometers. Maintenance tips for the catalytic converter: 1. Fuel quality selection: Avoid using low-quality gasoline. When fuel quality is poor, sulfur, phosphorus, lead in the fuel, and manganese in the anti-knock agent can form chemical complexes inside the catalytic converter after combustion, leading to clogging over time. 2. Cleaning: Typically, the catalytic converter should be cleaned every 30,000 kilometers. If you notice increased fuel consumption or reduced power, inspect and clean the catalytic converter as needed. Clean the catalytic converter each time the fuel injectors, throttle body, and intake system are serviced. Before annual vehicle inspections, clean the catalytic converter to ensure smooth passage of the emissions test.

[LaGemma]

I don't think the catalytic converter is something with a fixed replacement schedule like engine oil. It's more like the heart of the car's exhaust system, typically lasting around 100,000 to 150,000 kilometers, but it really depends on your driving habits. I commute on highways, and my converter is still functioning fine at 120,000 kilometers. The key is to watch for symptoms, like strange exhaust smells, the engine warning light coming on, or a sudden spike in fuel consumption—these could mean the converter is clogged or failing. Replacing one is quite expensive, costing several thousand yuan, so I recommend having mechanics check the exhaust values during regular maintenance rather than waiting for a breakdown. Also, using low-quality or poor-grade gasoline can damage the converter, which is why I always fill up at major gas stations. In short, there's no one-size-fits-all timeline—just rely on inspections and listening to your car.

[EllianaDella]

Having worked in the auto repair shop for many years, I've learned that catalytic converter replacement is primarily based on performance indicators. It's not a routine maintenance item, but rather something that needs attention when OBD trouble codes like P0420 appear or emission tests show excessive pollutants. Typically, it can last 100,000 to 150,000 kilometers, but poor-quality fuel or engine issues can shorten its lifespan. I often advise car owners to scan for trouble codes every 50,000 kilometers; if the catalytic converter deteriorates, failing to replace it can lead to increased fuel consumption, reduced power, and even engine damage. Price-wise, it starts at a few thousand yuan for regular cars and goes up for high-end models. For prevention, keeping the air filter clean and regularly replacing the mass airflow sensor are key. Don't underestimate the cumulative effect of small things—routine maintenance can make it last longer.

[LaBentley]

As an environmentally conscious individual, I believe the three-way catalytic converter is crucial for controlling exhaust pollution, but there's no fixed replacement interval. It typically lasts around 100,000 kilometers, depending on road conditions and fuel quality. If it fails, it will emit air pollutants harmful to the environment. I recommend getting an exhaust emission test at a testing station every 50,000 kilometers to ensure compliance. Addressing issues early through repair or replacement not only benefits the environment but also protects the engine. Remember, the catalytic converter relies on high temperatures to function, and frequent short-distance driving may accelerate aging. Switching to high-quality gasoline can extend its lifespan. Environmental protection isn't just talk; it starts with the details of car care.

[SanLyla]

From a cost-saving perspective, replacing the three-way catalytic converter is too expensive and not recommended for regular changes. Generally, manufacturers don't provide a specific schedule, but based on my experience, it's usually fine within 100,000 to 150,000 kilometers. However, if there's an unusual smell in the exhaust, the engine light comes on, or there's a lack of acceleration power, it's necessary to check for catalytic converter issues. Replacing it once can cost thousands or even tens of thousands, which is quite expensive. That's why I emphasize daily maintenance: simply test the exhaust values during each service, and address any issues early—sometimes just cleaning is enough. Investing in small checks is more cost-effective than major repairs. Poor fuel quality is a common cause, so it's wise to consistently refuel at reputable gas stations.