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When and Why to Replace your Muffler

A muffler reduces the noise of your vehicle’s exhaust.

Why change your muffler?

A defective muffler doesn’t properly reduce the noise from your exhaust system and can also lead to excess fuel consumption.


When to change your muffler

A muffler's lifetime is for an average of 80,000 km, as long as the vehicle isn’t parked for a long period of time or frequently used for very short trips. If the vehicle is parked for a prolonged period or used for frequent short trips, this causes an accumulation of moisture, which leads to corrosion of the muffler. Basically, on trips lasting less than ten minutes, the exhaust pipes don’t heat up sufficiently to fully evaporate the water.

A catalytic converter or an intermediate muffler in poor condition can damage the rear muffler. To guarantee the maximum longevity of your muffler(s), the exhaust line must be in perfect shape.

A few signs of trouble:

  • Sounds of clanking metal in the floorboard are an indication that the baffles are coming loose and moving around in the exhaust system.
  • Slightly higher fuel consumption
  • The vehicle makes more and more noise as it accelerates.


Muffler diagnosis:

  • Gently shake the exhaust pipe to verify that it is properly secured by its rubber clamps or hangers. A well-secured exhaust pipe dampens the vibrations that could weaken the weld joints.
  • Check the condition of the rubber clamps or hangers and look for cracks.
  • Check for rust or holes in the exhaust muffler.
  • Bang on the shell of the muffler to check for a noise like sandpaper, indicating that the rockwool packing is coming apart.