Question about 2003 Nissan Pathfinder

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How long can I expect the muffler/exhaust system to last before needing replacement? My 2003 Pathfinder has about 86,000 miles and entered service in March 2003. Purchased used a little over one year ago.

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  • Master
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Under normal conditions they can last 15 years or more..

If the car has been up north in any of the states that salt their roads in the winter - that will sertainly shorten the time..

Or if the car has been on or close to beaches..

Road conditions - debris - puntures - etc....

Hope this helps !!
Please rate me good ;o)

Posted on Jul 11, 2009

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  • Nissan Master
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You can likely answer that question better than I can (you can look at it) Generally your system will last right about as long as it has. Less use will shorten the muffler life as condensation does not get a chance to burn off as it normally would. The system has an aluminum coating that covers up rust. Any place you see rust, likely the inner pipe is more rusted than what you are seeing. Some systems last up to 120K...hard to predict as there are too many factors that influence deterioration.

Posted on Jul 11, 2009

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If there are no sensors connected to, or in the exhaust immediately before or after the resonator on your particular truck, then there should be no reason stopping you removing it and replacing it with a length of pipe.
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Check the heat shield on the Catalytic Converter, after a few years they start to rust off and rattle. Crawl under the Pathfinder and bang along the Converter and muffler area and see where it's coming from.   Good chances are, it's from the heat shield since you already had everything changed from the Cat back.
Good luck and hope this helps.

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