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What is a catalytic converter?

Everything you need to know about car catalytic converters. How they work, what their purpose is and why they are mandatory in cars manufactured after 1989 in Sweden.

What Is a Catalytic Converter?
A catalytic converter is part of a car’s exhaust system designed to convert harmful gases into less harmful substances. In Sweden, every car manufactured after 1989 is required to have a catalytic converter. It operates at high temperatures, typically between 400 and 600°C, and can reduce toxic emissions by up to 90%.

How Does It Work?

  • Located in the exhaust system, it heats up when the engine is running.
  • It converts carbon monoxide (CO), hydrocarbons (HC), and nitrogen oxides (NOₓ) into carbon dioxide (CO₂) and water (H₂O).
  • By cutting down these harmful substances, it helps improve air quality and reduce environmental impact.

Fire Risk When Parking
Because a catalytic converter becomes extremely hot, it can pose a fire risk if you park on dry, tall grass or other flammable surfaces. The high temperature can ignite vegetation under the vehicle. To prevent this, always park in a safe spot where nothing is likely to catch fire.

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