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Can you drive a car without a catalytic converter?

Generally, you can drive a car without a catalytic converter. However, in most places in the United States, it is illegal to drive without a catalytic converter.

Catalytic converter rules differ by state, but it’s best to always have one in your car. The Clean Air Act of 1970 requires that all cars come with catalytic converters that meet federal standards from the factory.

can you drive without a catalytic converter
Image: Rudy Wijanarko

There are some exceptions to the emission test rules, though. Before the Clean Air Act was passed in 1970, most cars did not have catalytic converters. If your car never had a catalytic converter, you might qualify for an exception. In some states, like Georgia, a car older than 25 years is not required to pass the state’s emission test.

The answer to whether or not you can drive without a catalytic converter is – yes, you can, but no, you mustn’t. It’s illegal in most places, and you’ll likely fail an emissions test if you don’t have one.

If you wake up and find your catalytic converter is faulty or someone has made off with your catalytic converter (because they contain precious elements, such as platinum, palladium, and rhodium), you must replace it – pronto!

Also, when the converter fails, it won’t affect the engine immediately. However, if you don’t fix it, it will eventually break down and clog the exhaust. This can cause the engine to overheat, damage other exhaust parts, and may even lead to engine failure.

Renée Martin

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