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Regulations for Emissions from Vehicles and Engines

Final Rule for Control of Air Pollution from Motor Vehicles: Tier 3 Motor Vehicle Emission and Fuel Standards

On this page:

Rule Summary

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The final rule establishes the Tier 3 Motor Vehicle Emission and Fuel Standards program. The Tier 3 program is part of a comprehensive approach to reducing the impacts of motor vehicles on air quality and public health. The program considers the vehicle and its fuel as an integrated system, setting new vehicle emissions standards and a new gasoline sulfur standard beginning in 2017. The vehicle emissions standards will reduce both tailpipe and evaporative emissions from passenger cars, light-duty trucks, medium-duty passenger vehicles, and some heavy-duty vehicles. The gasoline sulfur standard will enable more stringent vehicle emissions standards and will make emissions control systems more effective.

Rule History

Additional Resources

Fact Sheet

Infographic showing that Tier 3 vehicle and fuel standards will provide substantial pollution reduction at low cost, annual prevention projections for 2030, health benefits for final standards, and sulfur and nitrogen dioxide reductions.

Technical Support Document



For a Compliance Guide for Tier 3 Small Entities, please see:

Regulations for Emissions from Vehicles and Engines Home