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Does replacing the catalytic converter affect the car?

4 Answers
KylieDella
09/08/25 8:06am

Replacing the catalytic converter does affect the car. The quality and function of the original catalytic converter are relatively better. The effects of a damaged catalytic converter on the car are as follows: Increased fuel consumption: A clogged catalytic converter affects the normal operation of the oxygen sensor, which in turn affects the accuracy of the oxygen sensor signals received by the engine. As a result, the engine cannot accurately control fuel injection, air intake, and ignition, leading to increased fuel consumption. Poor exhaust flow and reduced power: This is more noticeable in turbocharged models. When a clogged catalytic converter causes poor exhaust flow during high-pressure exhaust situations, the air intake is affected, resulting in decreased engine power, reduced acceleration, and a feeling of sluggishness while driving. This is especially noticeable when climbing hills. To compensate for the lack of power, drivers often press the accelerator harder, further increasing fuel consumption.

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DeBraxton
09/20/25 6:30am

I've been driving for almost 10 years and have replaced the catalytic converter several times, which I feel is generally a good thing. When an old catalytic converter gets clogged, it restricts exhaust flow, making the car feel sluggish and increasing fuel consumption. After replacing it with a new one, the car runs much smoother, emissions are cleaner, and the air even feels fresher. However, it's important not to go for cheap replacements at roadside stalls, as improper installation can lead to issues like poor sealing causing leaks or even engine malfunctions. I recommend choosing genuine parts and professional installation services. Although it might cost a bit more, it ensures durability. In the long run, the car runs more reliably, avoiding the risk of failing emissions tests and facing penalties. Last time I replaced it, I even saved a bit on fuel costs, making it a cost-effective choice overall.

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GeorgeLee
11/03/25 6:53am

As an average car owner, my main concern about replacing the catalytic converter is practical impact. The replacement does improve the exhaust system - the car runs smoother, exhaust odors are reduced, which benefits the environment. However, the cost is significant, with parts and installation totaling several thousand yuan. If the converter isn't faulty, don't replace it blindly. From my experience, regular exhaust system inspections are key - only replace when clogging is detected, otherwise it's money wasted. Never fall for claims suggesting catalytic converter removal for modifications - while it may boost power, it's illegal and could damage the engine. For peace of mind and wallet protection, always go to authorized dealerships or reputable repair shops.

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LaDiana
12/17/25 6:53am

Shortly after buying the car, I found that the exhaust emission test kept failing. The mechanic suggested replacing the catalytic converter. After the replacement, the car immediately ran much better. The catalytic converter is responsible for purifying exhaust gases; when it ages, it becomes ineffective. Installing a new one allows the engine to breathe smoothly and reduces pollution. However, it's crucial to ensure the replacement is the correct model—using the wrong one can cause issues. It's recommended to have it checked and replaced by a professional shop rather than attempting it yourself. Proper maintenance can extend the car's lifespan and make it more environmentally friendly.

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