As Adopted: September 5, 2003

Board Hearing: December 12, 2002

State of California

AIR RESOURCES BOARD

CALIFORNIA SMOG INDEX LABEL SPECIFICATIONS

FOR 2004 AND SUBSEQUENT MODEL

PASSENGER CARS AND LIGHT-DUTY TRUCKS

Adopted: September 5, 2003

Note: This new document is an abbreviated version of the “California Motor Vehicle

Emission Control and Smog Index Label Specifications” (the old Label

Specifications document), which has been sunsetted after the 2003 model year. All

of the tune-up label requirements in the old Label Specifications document

applicable to light-, medium and heavy-duty vehicles and motorcycles are being

incorporated into their respective test procedure documents effective with the 2004

model year, making a separate document covering the California tune-up label

requirements no longer necessary.

Effective with the 2004 model year, all of the smog index requirements in the old

Label Specifications document are being moved to the new document shown here. 

Paragraph 1of this new document was previously contained in paragraph 11 of the

old Label Specifications document; paragraphs 2, 3, and 4 were previously set forth

in paragraphs 3.5, 3.5(c), and 3.5(d) respectively of the old Label Specifications

document; and Appendix A in this new document is identical to Appendix A in the

old Label Specifications document. 
As Amended: September 5, 2003

Board Hearing: December 12, 2002

1

State of California

AIR RESOURCES BOARD

California Smog Index Label Specifications

1. Prohibition. The sale and registration in this state of any certified new 2004

and subsequent model passenger car or light-duty truck to which a smog index label has

not been affixed in accordance with these procedures is prohibited. 

2. Requirements. A smog index label made of paper or plastic shall be

securely affixed in a location specified in section 43200 of the Health and Safety Code. 

The smog index label shall display the smog index for the vehicle, as specified in section 3.

below, and the fleet average smog index, which shall be referred to as “The Smog Index of

the average new vehicle.” Every model-year, the fleet average smog index shall be

updated on the smog index label as specified in section 4 below. The smog index label

shall also include information to inform purchasers of the significance of the smog index. 

The smog index label shall take the form set forth in Appendix A of this document. An

alternative label may be used if shown to yield equivalent clarity and if approved in advance

by the Executive Officer.

3. Smog Indices. The following smog indices shall apply to 2004 and

subsequent model-year passenger cars and light-duty trucks 0-8500 lbs. GVW:
As Amended: September 5, 2003

Board Hearing: December 12, 2002

2

Enhanced

Evap.

2.0g/ diurnal

+ hot soak

test, 0.05

g/mi – running

loss test, at

100,000

miles

PCs 0.5 g/

diurnal + hot

soak test,

0.05 g/mi –

running loss

test, at

150,000

miles

LDTs < 6,000

lbs. GVW

0.65 g/ diurnal +

hot soak test,

0.05 g/mi –

running loss

test, at 150,000

miles

LDTs 6,001-

8,500 lbs. GVW

0.90 g/ diurnal +

hot soak test,

0.05 g/mi -

running loss

test, at 150,000

miles

Evap.

Exempt

LEV I

Passenger Cars and Light-Duty Truck 1 (0-3750 lbs. LVW)

LEV 1.00 0.92 0.93 0.94 0.80

ULEV 0.90 0.82 0.83 0.84 0.70

ZEV n/a n/a n/a n/a 0.00

Light-Duty Truck 2 (3751-5750 lbs. LVW)

LEV 1.65 n/a 1.58 1.60 1.45

ULEV 1.51 n/a 1.44 1.45 1.30

ZEV n/a n/a n/a n/a 0.00

LEV II

Passenger Cars; Light-Duty Truck 1 (0-3750 lbs. LVW);

Light-Duty Truck 2 (3751 lbs. LVW – 8500 lbs. GVWR)

LEV 0.57 0.49 0.50 (0.55)(1) 0.51 (0.57)(1) 0.36

ULEV 0.46 0.39 0.40 0.41 0.26

SULE 0.29 0.21 0.22 0.23 0.09

ZEV n/a n/a n/a n/a 0.00

 (1) The smog index in parentheses applies to the optional LEV II LEV standard. Up to 4%

of a manufacturer’s light-duty truck 2 fleet with a maximum base payload of 2500 lbs. may

be certified to a standard of 0.07 g/mi NOx at 50,000 miles.

4. Fleet Average Smog Indices:

The following fleet average smog indices shall apply to 2004 and subsequent

model-year passenger cars and light-duty trucks 0-8500 lbs. GVW:

2004 2005 2006 2007 2008 2009 2010 and

subsequent

1.02 0.80 0.58 0.40 0.38 0.37 0.36
As Amended: September 5, 2003

Board Hearing: December 12, 2002

3

APPENDIX A

SMOG EMISSIONS INFORMATION

The Smog Index of this vehicle is The Smog Index of the average new vehicle is

0.34 0.52

? ?

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0......3.0

? CLEANER MORE POLLUTING?

Note: The Smog Index (SI) indicates the relative level of smog-forming pollutants

emitted by the vehicle. The lower the SI, the lower the vehicle's emissions.