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Do emission warranties apply for large (heavy-duty) gas or diesel vehicles, including motor homes?

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Do emission warranties apply for large (heavy-duty) gas or diesel vehicles, including motor homes?

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Yes. Vehicles under 8500 pounds are classified as “light-duty” vehicles or trucks and are covered by the warranties for light-duty vehicles/trucks. Vehicles over 8500 pounds are classified as “heavy-duty engines” and are covered by the warranties for heavy-duty engines. Motor homes can fall in either category, depending on their weight. The warranties for heavy-duty engines are as follows: Otto-cycle heavy-duty engines (most of which are gasoline-fueled) and heavy-duty diesel engines have an emissions defect warranty and emissions performance warranty of 5 years or 50,000 miles, whichever comes first. All other heavy-duty diesel engines have a warranty period of 5 years or 100,000 miles, whichever comes first. However, in no case may this period be less than the manufacturers’ basic mechanical warranty period for the engine family. Beginning for model years 2004 and later, this period may not be less than the basic mechanical warranty period that the manufacturer provides (with or with

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