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Proposed Regulations Ensure Extended Life of Vehicle Emission Controls

Release Date: 03/24/2004
Contact Information:

John Millett 202-564-7842 /

(03/24/04) Automotive manufacturers would be required to show that new vehicles would meet emissions standards throughout the “useful life period” or 120,000 miles for most cars and trucks, under a proposed rule to be issued by EPA this week. These procedures are part of EPA’s vehicle emission certification program, under which vehicle prototypes are tested to demonstrate compliance with the federal emission standards. Upon this demonstration, EPA issues certificates of conformity allowing the manufacturer to produce and sell cars in the U.S. The proposed aging procedures include methods to accumulate mileage on prototype vehicles on a track and to simulate mileage accumulation using rapid aging techniques. EPA is undertaking this action to fulfill a court mandate issued on October 22, 2002 by the United States Court of Appeals for the District of Columbia Circuit to vacate the existing aging procedures and to write new regulations. This decision arose from a petition from the Ethyl Corporation to reconsider EPA’s existing durability regulations. Additional information is available at: