Emission Standards Reference Guide
Light-Duty Vehicle and Light-Duty Truck -- Tier 0, Tier 1, and National Low Emission Vehicle Implementation Schedule
| Vehicle Type | Test Proce dure |
Emission Category | Emission Standards | Model Year |
|||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1992 | 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004+ | |||||||
| Federal (non NLEV) | LDV, LDT1, & LDT2 | FTP | Tier 0 | Cert & In -use | 100% | 100% | 60% max | 20% max | 0% | - | - | - | - | - | - | - | Tier 2 Require ments Begin | ||
| Tier 1b | Certifi-cationa | - | - | 40% min | 80% min | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | ||||||
| Interim In -Use | - | - | 40% min | 80% min | 60% max | 20% max | 0% | - | - | - | - | - | |||||||
| Final In- Usea | - | - | - | - | 40% | 80% | 100% | 100% | 100% | 100% | 100% | 100% | |||||||
| SFTPa | Tier 1 | Cert & In -Usea | - | - | - | - | - | - | - | - | 40% | 80% | 100% | 100% | |||||
| LDT3, & LDT4 | FTP | Tier 0 | Cert & In -use | 100% | 100% | 100% | 100% | 50% max | 0% | - | - | - | - | - | - | ||||
| Tier 1 | Certifi- cationa | - | - | - | - | 50% min | 100% | 100% | 100% | 100% | 100% | 100% | 100% | ||||||
| Interim In -Use | - | - | - | - | 50% min | 100% | 50% max | - | - | - | - | - | |||||||
| Final In -Usea | - | - | - | - | - | - | 50% min | 100% | 100% | 100% | 100% | 100% | |||||||
| SFTPa | Tier 1 | Cert & In -Use | - | - | - | - | - | - | - | - | - | - | 40% min | 80% min | |||||
| Federal (NLEV) | LDV & LDT1 | FTP | Tier 1 | Certifi- cation |
- | - | - | - | - | - | - | NE Trading Region | All States Trading Region | ||||||
| TLEV | - | - | - | - | - | - | - | 0.148 NMOG fleet avg.f,g | 0.095 NMOG fleet avg.f | 0.075 NMOG fleet avg.g | 0.075 NMOG fleet avg. | 0.075 NMOG fleet avg. | |||||||
| LEV | - | - | - | - | - | - | - | ||||||||||||
| ULEV | - | - | - | - | - | - | - | ||||||||||||
| ZEV | - | - | - | - | - | - | - | ||||||||||||
| SFTP a, c | Tier 1 | Cert & In -use | - | - | - | - | - | - | - | - | - | 25% min | 50% min | 85% min | |||||
| TLEV | - | - | - | - | - | - | - | - | - | ||||||||||
| LEVd | Certifi- cation |
- | - | - | - | - | - | - | - | - | 25% min | 50% min | 85% min | ||||||
| ULEVd | - | - | - | - | - | - | - | - | - | ||||||||||
| LDT2 | FTP | Tier 1 | Certifi- cation |
- | - | - | - | - | - | - | NE Trading Region | All States Trading Region | |||||||
| TLEV | - | - | - | - | - | - | - | 0.19 NMOG fleet avg.f,g | 0.124 NMOG fleet avg.f | 0.1 NMOG fleet avg.g | 0.1 NMOG fleet avg. | 0.1 NMOG fleet avg. | |||||||
| LEV | - | - | - | - | - | - | - | ||||||||||||
| ULEV | - | - | - | - | - | - | - | ||||||||||||
| ZEV | - | - | - | - | - | - | - | ||||||||||||
| SFTP a, c | Tier 1 | Cert & In -use | - | - | - | - | - | - | - | - | - | 25% min | 50% min | 85% min | |||||
| TLEV | - | - | - | - | - | - | - | - | - | ||||||||||
| LEVd | Certifi- cation |
- | - | - | - | - | - | - | - | - | 25% min | 50% min | 85% min | ||||||
| ULEVd | - | - | - | - | - | - | - | - | - | ||||||||||
Notes:
a Small volume manufacturer exempt until last year of phase-in.
b Light-duty vehicle (LDV) may be combined with light-duty truck 1 (LDT1) and LDT2 for Tier 1 phase-in.
c LDV and LDT1 combined with LDT2 for Supplemental Federal Test Procedure phase-in.
d Other equivalent schedules allowed.
e Fleet average derived from 50,000 mile standards.
f Not applicable to small volume manufacturers.
g Early credits available.
Code of Federal Regulations (CFR) Citations: