Thus, the main function of the muffler in the vehicle is to enhance its overall functions. In your Mazda, it can reduce exhaust system noises and remove exhaust gases from the engine. Subsequently, it contains chambers that are breaking down the emission particulates and reduce the flow of the contaminated emissions from the combustion chambers. When the muffler is failed in your Mazda, you will notice the signs defined in the following slide while driving on the road.