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The national cost for a muffler replacement in 2023 is between $186 and $1028 with an average of $328​

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POPULAR VEHICLES

National average cost of a a Muffler Replacement
for popular vehicles:

Honda Civic

Avg. cost
$370

Subaru Outback

Avg. cost
$562

Honda CR-V

Avg. cost
$354

Car Model

Avg. cost

$50

What is a muffler and how does it work?

A muffler is a major component of the exhaust system on a vehicle, intended to reduce engine noise. A vehicle will typically have one or two mufflers, depending on the configuration of both the engine and the exhaust system.

An internal combustion engine relies on rapidly expanding gasses produced by burning fuel to propel the pistons and produce power. The process of combustion, however, carries some unwanted byproducts in the form of harmful emissions, heat, and noise. Therefore, an engine is fitted with an exhaust system to route the engine exhaust away from vehicle occupants and to quiet down the sound of the engine.

The exhaust system collects the hot exhaust gasses in the exhaust manifold as they exit the engine’s cylinders. From there, the exhaust passes through tubes (exhaust pipes) to the catalytic converter and ultimately to the muffler and out of the tailpipe at the rear of the vehicle.

Inside the muffler are several sound-deadening chambers and sound-absorbing materials that are used to dampen the noise produced by exhaust gasses.

COMMON SYMPTOMS

How do I know if my vehicle needs a new muffler?

Since the main purpose of a muffler is to dampen engine noise, the most common sign that a vehicle might need a new muffler is a louder sound when the engine is running. A change in the volume of the sound of your engine can happen gradually or all at once, depending on the problem with your muffler.

Other symptoms can also point to a bad muffler. A rattling noise coming from underneath the vehicle can indicate a corroded or broken muffler mount or tailpipe. The smell of exhaust fumes inside your vehicle can reveal an exhaust leak. Even a drop in fuel economy or an engine misfire can sometimes be attributed to a bad muffler if the exhaust flows either too freely or too restrictively through the muffler.

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HOW IS THIS SERVICE PERFORMED?

How is a a Muffler Replacement done?

To replace a muffler, a technician will first need to lift and support your vehicle in the air for access. From there, the process to remove and replace a muffler depends on whether the component is bolted or welded in place. If bolted, it is common for the fasteners to be corroded and difficult to remove. If welded, the old muffler must be cut away from the exhaust pipe, and the new muffler welded on.

Most mufflers are held in place with rubber mounts. These mounts need to be removed so that the exhaust system can hang down enough to gain clearance. Once the exhaust system has been lowered sufficiently, the exhaust pipe ahead of the muffler is either unbolted or measured and cut. Then the muffler is extracted, and the tailpipe is cut off before the new muffler is set in place and bolted or welded.

Some mufflers come with additional hardware, such as bolt-on flanges, tailpipes, and exhaust gaskets. Others require that the entire exhaust system be removed from the vehicle in order to install a new muffler.


    Other questions customers ask

    Is it okay to drive with a broken muffler?
    It is not recommended that you drive your vehicle with a faulty muffler for a number of reasons. First of all, a muffler is required in most states. Therefore, it is unlawful to drive without one or with an exhaust system that leaks enough to produce excessive noise. Secondly, an exhaust leak can pose a serious health hazard. Exhaust fumes that enter the passenger compartment are harmful and even fatal to humans. But even your engine performance can be affected by a bad muffler, since the engine is tuned to operate with a certain amount of exhaust back-pressure.
    Can a muffler damage an engine?
    While serious engine damage due to a bad muffler is uncommon, poor engine performance as a result is not. Your engine is designed to run with a certain amount of back-pressure from the exhaust system. If your muffler is damaged inside so that it allows exhaust to flow too freely (or if the connection to the front of the muffler is detached), or if the muffler is clogged and restricts air flow, your engine could become sluggish, misfire, and lose fuel economy.
    Can you replace just the muffler?
    Yes. It is possible to replace only the muffler in an exhaust system. The manner of replacement is often determined by the configuration of the system. Some mufflers are bolted to the exhaust pipes. Others are welded on. The repair can take place with most of the exhaust system in place on some vehicles, whereas with others, the exhaust system must be removed for service.

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    RELATED PARTS

    What parts are related to a Muffler Replacement?

    Muffler

    Related Parts

    RELATED SERVICES

    What are some other common services related to a Muffler Replacement?

    Exhaust Pipe Gasket Replacement
    Intake Manifold Replacement
    Intake Manifold Gasket Replacement

    Related Services

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