---
kind: "unit"
title: "40"
title_heading: "Protection of Environment"
key: "chI/subchC/part85"
level: "part"
label: "Part 85"
heading: "Control of Air Pollution from Mobile Sources"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/40/chI-subchC-part85"
sections_count: 88
---

# Part 85 — Control of Air Pollution from Mobile Sources

Title 40 C.F.R. — Protection of Environment › Chapter I — Environmental Protection Agency › Subchapter C — Air Programs

## Contents

- [Subpart A-E — Subparts A-E [Reserved]](/cfr/40/chI-subchC-part85-subpartA-E.md)
- [Subpart F — Exemption of Clean Alternative Fuel Conversions From Tampering Prohibition](/cfr/40/chI-subchC-part85-subpartF.md)
- [Subpart G-O — Subparts G-O [Reserved]](/cfr/40/chI-subchC-part85-subpartG-O.md)
- [Subpart P — Importation of Motor Vehicles and Motor Vehicle Engines](/cfr/40/chI-subchC-part85-subpartP.md)
- [Subpart Q — Subpart Q [Reserved]](/cfr/40/chI-subchC-part85-subpartQ.md)
- [Subpart R — Exclusion and Exemption of Motor Vehicles and Motor Vehicle Engines](/cfr/40/chI-subchC-part85-subpartR.md)
- [Subpart S — Recall Regulations](/cfr/40/chI-subchC-part85-subpartS.md)
- [Subpart T — Emission Defect Reporting Requirements](/cfr/40/chI-subchC-part85-subpartT.md)
- [Subpart U — Subpart U [Reserved]](/cfr/40/chI-subchC-part85-subpartU.md)
- [Subpart V — Warranty Regulations and Voluntary Aftermarket Part Certification Program](/cfr/40/chI-subchC-part85-subpartV.md)
- [Subpart W — Emission Control System Performance Warranty Tests](/cfr/40/chI-subchC-part85-subpartW.md)
- [Subpart X — Determination of Model Year for Motor Vehicles and Engines Used in Motor Vehicles Under Section 177 and Part A of Title II of the Clean Air Act](/cfr/40/chI-subchC-part85-subpartX.md)
- [Subpart Y — Fees for the Motor Vehicle and Engine Compliance Program](/cfr/40/chI-subchC-part85-subpartY.md)