The muffler is the auto part that dampers the sound of your exhaust system. It uses acoustic quieting, reducing the exhaust system’s vibrations to minimize sound pressure and create a quieter vehicle. To avoid driving a car that makes a lot of noise, here are a few signs it’s time to replace your muffler.

How Can I Tell If I Need to Change My Muffler?

1. Loud Noises

Since mufflers are designed to dampen noises, loud sounds mean there’s something amiss. Rattling indicates a loose or broken muffler part, and roaring means there’s a hole or crack that’s preventing engine exhaust from flowing through the muffler smoothly. Additionally, normal vibrations will also resonate louder than usual.

2. Engine Misfiring

Your muffler is part of an intricate system designed to direct engine exhaust away from your car’s cabin. The engine will misfire if the muffler has a hole because the oxygen sensor mistakenly believes you need more fuel. Excessive engine fuel makes contact with oxygen from the muffler leak, causing misfires.

3. Exhaust Pipe Leaks

The air in the exhaust pipe eventually cools, allowing the resulting moisture to accumulate in the pipe and muffler. Over time, the warming and cooling cycles wear the muffler, creating rust that cracks this auto part, making it leak.

4. Foul Odors

An exhaust system leak prevents the muffler from thoroughly filtering engine exhaust. When this occurs, foul smells will emanate from the car. You may catch a whiff of these odors when you’re driving or when you stop and get out. Exhaust fumes are dangerous because they contain carbon monoxide and other toxic byproducts, which can cause hypertension as well as respiratory and central nervous system issues.

If you need a new muffler, get it from Larry’s Auto Parts in Hawaii. Since 1965, this NAPA Auto Parts® franchise has served drivers throughout Hawaii Kai, Aina Haina, Waialae Iki, Kahala, Kaimuki, Kapahulu, Diamond Head, Waikiki, Manoa, Ala Moana, Makiki, McCully, Mo'ili'ili, Kaka'ako, and Honolulu. Their friendly team will take the time to help you find a muffler that’s compatible with your vehicle’s make and model and suggest tools you’ll need to finish the job. Call (808) 734-2147 to ask about their current inventory, or read the latest customer reviews on Yelp.