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A catalytic converter can be ruined by a engine that is missing and dumping raw fuel into the converter.

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Q: Why would catalytic converter have to replaced on a new car with 20000 miles?
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How many miles to replace the catalytic converter?

A catalytic converter may last the life of the car. There is no set time to replace it.


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Why would the catalytic converter have to be replaced 8 times in a 1997 Chevy Monte Carlo first at 37000 miles purchased new Service department replaced all possibilities and say they do not know why?

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