40 CFR — Protection of Environment
Appendix A to Part 1068—Emission-Related Components
United States · 40 CFR — Protection of Environment · Status: effective
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- 40 CFR — Protection of Environment, Appendix A to Part 1068—Emission-Related Components, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/196033
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Full text
This appendix specifies emission-related components that we refer to for describing such things as emission-related warranty or maintenance or requirements related to rebuilding engines. Note that inclusion of a component in Section III of this Appendix does not make it an emission-related component for engines/equipment that are not subject to evaporative emission standards.
I. For exhaust emissions, emission-related components include any engine parts related to the following systems:
1. Air-induction system.
2. Fuel system.
3. Ignition system.
4. Exhaust gas recirculation systems.
II. The following parts are also considered emission-related components for exhaust emissions:
1. Aftertreatment devices.
2. Crankcase ventilation valves.
3. Sensors.
4. Electronic control units.
III. The following parts are considered emission-related components for evaporative emissions:
1. Fuel Tank.
2. Fuel Cap.
3. Fuel Line.
4. Fuel Line Fittings.
5. Clamps*.
6. Pressure Relief Valves*.
7. Control Valves*.
8. Control Solenoids*.
9. Electronic Controls*.
10. Vacuum Control Diaphragms*.
11. Control Cables*.
12. Control Linkages*.
13. Purge Valves.
14. Vapor Hoses.
15. Liquid/Vapor Separator.
16. Carbon Canister.
17. Canister Mounting Brackets.
18. Carburetor Purge Port Connector.
*As related to the evaporative emission control system.
IV. Any other part or system that meets the definition of critical emission-related component.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.