The engine is sounding louder than it did before.
Increases in engine noise are usually caused by exhaust leaks. Older vehicles, such as your Mazda, can develop exhaust leaks over time and develop a growing noise. If your car is driving normally but giving out an overall louder noise during your commute, it is likely your car is experiencing an exhaust leak somewhere in the exhaust system. Since exhaust leaks can be difficult to pinpoint, enlisting the help of a certified mechanic can help you tackle this problem and quiet down your vehicle so you can enjoy listening to other things then engine noise on your drive.
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