Emission Possible

How your car's exhaust system helps minimize noise and prevent pollution.

Most people think mufflers just keep their car quiet. While that's a big part of the job, there's a lot more to it. The muffler is just one component in the exhaust emission system, which is responsible not only for cutting down on noise pollution, but for cutting down on air pollution, too.

Exhaust

How It Works

Your exhaust emission system really starts at the front of your car, right behind your engine. Exhaust manifolds connect to the cylinder heads, where they collect exhaust gases. As the gases move through the exhaust system, they're first analyzed by oxygen sensors, then refined by the catalytic converter and, finally, muffled by the muffler. So by the time those gases leave the vehicle, your emission system has made your car run smoother, cleaner, and quieter.

It's a pretty complex system, but the expert mechanics at Midas can diagnose the problem and get you right back on the road.

What to Watch For

Common Signs of Wear

• Exhaust manifolds and gaskets: cracks or small holes could cause exhaust leaks, affecting both safety and performance
• Oxygen sensors: cracks, damaged wires, or blocked intakes could cause incorrect fuel/air mixture adjustments and poor fuel economy
• Catalytic converters: overheating, dents, clogs, or corrosion could cause air pollution, excessive noise and rough idle
• Resonators and mufflers: excessive rust or holes could cause air pollution, excessive noise and a rough idle
• Pipes, hangers, clamps, and brackets: excessive rust or broken bolts could cause parts to hang dangerously low, resulting in a hazard for the people driving behind you