As a critical component of your vehicle’s exhaust system, your muffler plays a critical role in the reduction of noise pollution. So when it has a defect or is broken, you’ll hear a great deal of noise. Plus, exhaust can enter the vehicle a pose a significant health threat to you and your passengers. Unfortunately, vehicle manufacturers don’t list mufflers in their maintenance check-up schedules so it is important that you know how to determine if your muffler is broken or has a defect and correct the situation immediately. Otherwise, it could get very noisy and uncomfortable inside your vehicle.