Title 42 › Chapter CHAPTER 85— - AIR POLLUTION PREVENTION AND CONTROL › Subchapter SUBCHAPTER II— - EMISSION STANDARDS FOR MOVING SOURCES › Part Part A— - Motor Vehicle Emission and Fuel Standards › § 7541
Vehicle and engine makers must promise the first buyer and any later buyers that a new vehicle or engine meets federal emission rules when sold and won’t have defects that make it fail those rules during its useful life. For cars and light trucks made in 1995 and later, that promise covers defects for the warranty periods explained below. Part makers can certify that a part won’t cause the vehicle to fail emissions, under EPA rules the agency must write within two years after August 7, 1977. If an emission-control part is scheduled to be replaced during the vehicle’s useful life, and the part’s expected retail price plus installation is more than 2% of the vehicle’s suggested retail price, the vehicle maker must pay for or reimburse that replacement. If the EPA finds dependable test methods to check emissions in real use, it will set those tests and can require an emissions warranty tied to them. That warranty applies if the owner follows the maker’s maintenance instructions, the vehicle fails during the warranty period, and the owner faces any legal penalties because of the failure. If many vehicles of a type fail in normal use, the EPA will tell the maker to fix them at the maker’s expense and require the maker to notify dealers and owners. Makers must give written maintenance instructions, put a permanent label on the vehicle showing it meets emissions rules, and must not force buyers to use specific brands or only dealer service unless the EPA allows it. Owners must pay for routine items like spark plugs. Dealers cannot be charged by makers for costs the maker owes. Basic warranty time for light vehicles made in 1995 and later is 2 years or 24,000 miles (whichever comes first). Major emission parts (catalytic converter, electronic emissions control unit, and onboard diagnostic device) are warranted for 8 years or 80,000 miles (whichever comes first). Other in-use testing and useful-life rules set specific time and mileage limits for different vehicle types.
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The Public Health and Welfare — Source: USLM XML via OLRC
Legislative History
Reference
Citation
42 U.S.C. § 7541
Title 42 — The Public Health and Welfare
Last Updated
Apr 6, 2026
Release point: 119-73