Vehicle Emissions Inspection Requirements and Exemptions by State

Clearing the Smog Law Haze

Everyone agrees that taking strides toward keeping our planet healthy is a noble cause, but how should the burden be shared?  Clean air is a national concern addressed by the EPA, but the laws governing how motor vehicle smog checks are performed, which vehicles are tested and how frequently is handled at the state and local level.  Maybe a daily driver needs an inspection every two years or so, but what about an infrequently driven collector car? Are the laws different for 3/4- or 1-ton trucks? And what if that truck is a diesel?  The SEMA Action Network (SAN) helps you keep track of smog check requirements in each state and the laws that exempt certain specialty vehicles.

The following information is current as of July 23, 2017 and is posted here for enthusiasts to learn more about vehicle emissions inspection laws in their states.  Please understand that state laws are subject to change, and it is important to consult the current statutes and regulations in your state to ensure accurate information.  You should not rely solely on the following information, and SEMA disclaims any responsibility for damages that arise out of reliance on the following information.  If you have further questions, please contact the SAN at san@sema.org.


AL
 | AK | AZ | AR | CA | CO | CT | DE | DC | FL | GA | HI | ID | IL | IN | IA | KS | KY 

LA | ME | MD | MA | MI | MN | MS | MO |MT | NE | NV | NH | NJ | NM | NY | NC | ND

OH | OK OR | PA | RI | SC | SD | TN | TX | UT | VA | VT | WA | WV | WI | WY

 

ALABAMA

None.


ALASKA

None.


ARIZONA

Emissions inspections are required for vehicles registered in the metro Phoenix area (Area A) and the metro Tucson area (Area B) and must be inspected for emissions no more than 90 days prior to registration. Registration renewal applications issued by the MVD will include the statement “Emission Test Required” when the vehicle is required to be tested.

Diesel Vehicles:
Diesel vehicles are required to be tested annually.

Exemptions:
1. Vehicles registered outside of Phoenix and Tucson Metro Area zip codes.
2. Gasoline-powered and alternative fuel vehicles 5 model years old and newer (this does NOT include reconstructed vehicles).
2. Pre-1967 model year vehicles
3. Vehicles registered as “collectible” with collectible vehicle insurance

For more information visit: http://www.azdot.gov/mvd/RegRenewal/RenewalInfo.asp, http://www.azdeq.gov/environ/air/vei/, and http://www.myazcar.com/


ARKANSAS

None.


CALIFORNIA

Currently, smog inspections are required for most vehicles every two years for registration renewal.

Diesel Vehicles:
All diesel vehicles 1998 model or newer or an GVWR of less than 14,000 lbs.

Exemptions:
1. Gasoline powered 1975-year model or older
2.  Electric
3.  Natural gas powered with a GVWR rating of more than 14,000 lbs.
4.  Owners of vehicles six or less model years old will pay an Annual Smog Abatement Fee for the first six registration years instead of being required to provide a biennial smog certification.

For more information visit: http://www.dmv.ca.gov/vr/smogfaq.htm#BM2543; http://www.bar.ca.gov/01_ConsumerActivities/01_GettingSmogged/index.html,

For information on Kit and Specially Constructed Vehicles visit: https://www.dmv.ca.gov/portal/dmv/detail/vr/spcnsreg


COLORADO

The full counties of Boulder, Broomfield, Denver, Douglas and Jefferson and portions of Adams, Arapahoe, Larimer, Weld, and El Paso counties require a passing emission test to register a vehicle.

Diesel Vehicles:
All diesel vehicles model years 2007 – 2013 need an emission test biennially and all diesels model years 1986 – 2006 need emissions tests annually.

Exemptions:
1. Vehicles that are seven (7) model years old and newer
2. Vehicles in their "off" year cycle - vehicles require an inspection every other year.
3. All-electric vehicles (hybrid-electric vehicles are inspected after 7 years).
4. Collector plated vehicles (model year 1975 and older).
5. Horseless carriages, street rods, and kit cars

For more information visithttp://aircarecolorado.com/index.php/consumer-information/2015-emissions-inspction-program-faq/, https://www.colorado.gov/pacific/dmv/gas-vehicles, and https://www.colorado.gov/pacific/dmv/diesel-vehicles


CONNECTICUT

Emissions inspections are required every two years. The state notifies registered vehicle owners of an upcoming test date 45 days in advance of when the test is due to be conducted.

Diesel Vehicles:
Diesel vehicles are required to be tested in the same manner as gasoline powered vehicles

Exemptions:
1. New vehicles for the newest four (4) model years
2. Motor vehicles twenty-five (25) model years old and older
3. Vehicles with a GVWR of more than 10,000 lbs
4. Vehicles registered as composite vehicles
5.  Full electric-powered (non-hybrid)
6. Vehicles registered but not designed primarily for highway use
7. Vehicles with Dealer, Repairer, or Transporter Plates

For more information visit: http://ctemissions.com/ 


DELAWARE

Emissions inspections are required for vehicles when vehicles are registered or when registration is renewed.

Diesel Vehicles:
Required for all diesel vehicles manufactured after 1997

Exemptions:
1. New vehicles for the newest five (5) model years
2. Pre-1968 model year vehicles.
3. Vehicles with a GVWR of more than 8,500 lbs

For more information visit:http://www.dmv.de.gov/services/vehicle_services/reg/ve_reg_emissions.shtml


DISTRICT OF COLUMBIA

Emissions inspections are required for vehicles prior to registration and every two years thereafter.

Diesel Vehicles:
Diesel vehicles are not tested for emissions.

Exemptions:
1. New vehicles are exempt from the initial inspection for four years, but are required to display the inspection sticker that is provided by the DMV upon initial titling/registration
2. Pre-1968 model year vehicles
3. Designated as a zero emissions vehicle.

For more information visit: https://dmv.dc.gov/service/vehicle-inspections


FLORIDA

None


GEORGIA

Emissions if your vehicle is a 1993 – 2014 model year gasoline-powered car or light-duty truck (8,500 pounds gross vehicle weight rating or less) registered in Cherokee, Clayton, Cobb, Coweta, DeKalb, Douglas, Fayette, Forsyth, Fulton, Gwinnett, Henry, Paulding or Rockdale County, it must be emissions tested. 

Diesel Vehicles:
Diesel vehicles are not tested for emissions.

Exemptions:
1. New vehicles for the newest three (3) model years
2. Motor vehicles twenty-five (25) model years old and older
3. Vehicles with a GVWR of more than 8,500 lbs
4. Kit cars, hot rods, and gray market vehicles are provided with non-conforming status if they were granted non-conforming status before December 31, 1998.

For more information visit: http://www.cleanairforce.com/motorists/


HAWAII

None


IDAHO

Vehicles registered in Ada and Canyon Counties are required to undergo emissions testing for registration and registration renewal. 

Diesel Vehicles:
Diesel vehicles are required to be tested in the same manner as gasoline powered vehicles and are provided with the same exemptions.

Exemptions:
1. New vehicles for the newest four (4) model years
2. Pre-1981 model year vehicles
3. Electric or hybrid motor vehicles
4. Classic automobiles as defined by Idaho Code
5. Vehicles with a GVWR of less than 1,500 lbs
6. Vehicles with a GVWR of greater than 14,000 lbs

For more information visit: http://www.idahovip.org/


ILLINOIS

Vehicles registered in specific ZIP codes in the Northeastern Illinois and Metro-East St. Louis areas are subject to testing every two years.

Diesel Vehicles:
Diesel vehicles are not tested for emissions.

Exemptions:
1. New vehicles for the newest three (3) model years
2. Pre-1968 model year vehicles
3. Vehicles of model year 1995 or before that were in compliance with the Illinois Vehicle Emissions Inspection Law on February 1, 2007
4. Electric Vehicles
5. Vehicles registered as antiques, expanded use antiques, customs and street rods
6. Vehicles for which a Junking Certificate has been issued by the Secretary of State pursuant to the Illinois Vehicle Code (625 ILCS 5/3-117).
7. Vehicles of model year 2006 or earlier with a manufacturer gross vehicle weight rating between 8,501 and 14,000 pounds.
8. Vehicles with a manufacturer gross vehicle weight rating greater than 14,000 pounds.

For more information visit: http://illinoisairteam.net/


INDIANA

Vehicles registered in Lake County and Porter County (Chicago metropolitan area) are required to undergo emissions testing biennially.

Diesel Vehicles:
Diesel vehicles are not tested for emissions.

Exemptions:
1. New vehicles for the newest four (4) model years
2. Pre-1976 model year vehicles
3. Kit cars and dune buggies that meet established criteria for a “Specialty Exemption”; specialty exemptions must be applied for and granted every two years
4. Show cars that meet established criteria for a “Show Car Exemption”; show car exemptions must be applied for and granted every two years
5. Ceremonial vehicles
6.  Antique vehicles.
7. Vehicles with a GVWR of more than 9,000 lbs.
8. Electric Vehicles

For more information visit: http://www.in.gov/bmv/2655.htm and http://www.cleanaircarcheck.com/about_emissions_testing.php


IOWA

None


KANSAS

None


KENTUCKY

None


LOUISIANA

Vehicles registered in the five-parish area around Baton Rouge consisting of Ascension, East Baton Rouge, Iberville, Livingston, and West Baton Rouge parishes are subject to emissions testing during an annual combined safety/emissions inspection.

Diesel Vehicles:
Diesel vehicles are not tested for emissions.

Exemptions:
1. New vehicles for the newest two (2) model years
2. Pre-1980 model year vehicles
3. Vehicles with a GVWR of more than 10,000 lbs
4. Vehicles with antique registration and plate

For more information visit:  http://www.lsp.org/lse_form4.html  and http://deq.louisiana.gov/assets/docs/Air/FAQ052914.pdf


MAINE

Vehicles registered in the Cumberland County are subject to annual emissions testing that is performed at the same time as the state’s safety inspection. The emissions inspection includes an equipment check, a gas cap pressure test for 1974 and newer vehicles and an Onboard Diagnostics (OBD) inspection for 1996 and newer vehicles.

Diesel Vehicles:
Only diesel vehicles with a GVWR of more than 18,000 lbs are tested for emissions.

Exemptions:
1. Vehicles with antique registration and plates

For more information visit: http://www.maine.gov/dep/air/mobile/enhancedautoinsp.html


MARYLAND

Vehicles registered in 13 out of Maryland’s 18 counties and the city of Baltimore are required to undergo biennial emissions testing.

Counties: Anne Arundel, Baltimore, Calvert, Carroll, Cecil, Charles, Frederick, Harford, Howard, Montgomery, Prince George’s, Queen Anne’s, and Washington

OBD testing is performed on vehicles model year 1996 and newer and an idle tailpipe and gas cap test is administered on model year 1977-1995 vehicles.

Diesel Vehicles:
Diesel vehicles are not tested for emissions.

Exemptions:
1. New vehicles for the first 24 months and qualified hybrids for the first 36 months after titling and registration
2. Pre-1977 model year vehicles
3. Vehicles with a GVWR of more than 26,000 lbs
4. Vehicles registered as Class N street rod vehicles
5.  Historic or Antique vehicles
6. Electric Vehicles
7. Vehicles registered to senior citizens over 70 or vehicles registered with hard metal disable tags and who drive 5,000 miles per year or less.

For more information visit: http://www.mva.maryland.gov/about-mva/info/58000VEI/58000-06T.htm#appendix_c


MASSACHUSETTS

Massachusetts performs an OBD emissions test annually on model year 2003 and newer vehicles. Vehicles manufactured before model year 2003 no longer receive tailpipe emissions tests, but fail their safety inspections if they produce visible smoke.

Diesel Vehicles:
Diesel vehicles are required to undergo emissions testing based on their weight and model year. Pre-1984 diesel vehicles are exempt. Pre-1997 (or 15 or more model years old) light duty diesel vehicles and pre-2007 (or 15 or more model years old) medium duty diesel vehicles are exempt. 

Exemptions:
1. New vehicles delivered to Massachusetts owners
2. Vehicles 15 years old and older 
3. Electric Vehicles

For more information:http://massvehiclecheck.state.ma.us/motorist_basicinfo.html


MICHIGAN

None.


MINNESOTA

None.


MISSISSIPPI

None.


MISSOURI

Missouri requires biennial emissions testing (combined with the state’s biennial safety inspection) on vehicles registered in the St. Louis ozone nonattainment area, which includes St. Louis City and Franklin, Jefferson, St. Charles and St. Louis counties.

Diesel Vehicles:
Diesel vehicles must undergo OBD emissions testing in the same way as gasoline powered vehicles. Pre-1997 model year diesel vehicles are exempt.

Exemptions:
1. Pre-1996 model year vehicles
2.  New motor vehicles
3.  Motor vehicles sold for junk, salvage, or rebuilding
4. tor vehicles that display historic or street rod plates
7. Vehicles driven fewer than 12,000 miles between biennial safety inspections (must submit a mileage based exemption request)
8. Vehicles with a GVWR of over 8,500 lbs.
9.  Vehicles powered exclusively by solar power, electric, hydrogen

For more information visit: http://dor.mo.gov/motorv/help.php#emissions and http://www.dnr.mo.gov/gatewayvip/


MONTANA

None.


NEBRASKA

None


NEVADA

Nevada requires emissions testing on vehicles registered in Clark County (Las Vegas) and Washoe County (Reno) before the vehicle can be registered or its is registration renewed.

Diesel Vehicles:
Diesel vehicles with a GVWR of 14,000 or less must undergo emissions testing, but are provided with the same exemptions provided to gasoline powered vehicles.

Exemptions:
1. New vehicles for their first and second registration
2. New hybrid-electric vehicles for the first 5 model years
2. Pre-1968 model year vehicles
3. Vehicles based in remote areas of Clark and Washoe counties and all other Nevada counties
4. Alternative fuel vehicles.
5. Vehicles registered as a Classic Rod, Classic Vehicle or Old Timer and driven 5,000 miles or less per year.
6. Vehicles registered as a Replica Vehicle.

For more information visit:
Visit http://www.dmvnv.com/emission.htm for more information.


NEW HAMPSHIRE

New Hampshire requires all automobiles and light-duty trucks whose model year is 20 years old and newer must pass an OBD emission system inspection.

Diesel Vehicles:
Model year 1997 and newer diesel vehicles with a GVWR of 8,500 lbs or less must undergo emissions testing.

Exemptions:
1. Pre-1996 model year vehicles
2. Vehicles with a GVWR of more than 8,500 lbs
3. Vehicles 20 model years old or older

For more information visit: http://www.nh.gov/safety/divisions/dmv/registration/inspections-emissions/


NEW JERSEY

New Jersey requires emissions testing every two years.

Diesel Vehicles:
Light duty (8,500 lbs or less) diesel powered vehicles model year 1997 and later are required to undergo diesel emissions testing. 

Exemptions:
1. New vehicles for the newest five (5) model years
2. Vehicles model year 1995 & older with a GVWR 8,500 pounds or less.
3. Vehicles model year 2013 & older with a GVWR 14,001 pounds or more.
2. Vehicles registered as “historic vehicles”
3. Approved Collector Vehicles which are less than 25 years old
4. 100% Electric vehicles

For more information visit: http://www.state.nj.us/mvc/Inspections/VehiclesExempt.htm


NEW MEXICO

New Mexico requires emissions testing at the time of registration for vehicles registering in Bernalillo County. All 1983 and newer motor vehicles up to 10,000 lbs GVW must pass an emission test every two years and at change of ownership.

Diesel Vehicles:
No Required Emission Test

Exemptions:
1. New vehicles for four years following initial registration from the date of manufacturer's certificate of origin (MCO).
2. Electric Vehicles.
2.  Vehicles that are 35 years old or older.
3. Vehicles with a GVWR of more than 10,000 lbs.
4.  Vehicles that are used for legally sanctioned competition
5. Vehicles that are not operated on public streets and highways.

For more information visit: http://www.mvd.newmexico.gov/Vehicles/Pages/Emissions-Testing.aspx


NEW YORK

New York requires annual emissions testing in conjunction with the state’s annual safety inspection. Vehicles that weight 8,500 lbs or less which are model year 1996 or newer must undergo an OBD-II inspection. Vehicles manufactured prior to 1996 are subject to a low enhanced inspection. 

Diesel Vehicles:
Diesel-powered vehicles that that are 1997 or newer and that have a GVRW less than 8,501 pounds are subject to annual emissions inspection.

Exemptions:
1. New vehicles for the newest two (2) model years
2. Vehicles that are 26 model year old or older
3. Electric
3. Vehicles registered with historical plates

For more information visit: https://dmv.ny.gov/inspection/inspection-requirements


NORTH CAROLINA

North Carolina requires OBD emissions inspections annually in 48 counties. The inspections are performed in conjunction with the state’s safety inspections and must be performed prior to a vehicle’s registration or registration renewal.

Diesel Vehicles:
Diesel vehicles are not tested for emissions.

Exemptions:
1. Current model year vehicles
2. Pre-1996 model year vehicles
3. Vehicles that are 35 model years old or older
4. Vehicles with a GVWR of 8500 pounds and greater

For more information visit: http://www.ncdot.org/dmv/vehicle/registration/inspection/ and http://www.ncdot.gov/dmv/vehicle/title/vehicles/


NORTH DAKOTA

None.


OHIO

Ohio requires emissions tests for vehicles every other year in Cuyahoga, Geauga, Lake, Lorain, Medina, Portage, and Summit counties (Cleveland Metropolitan area). Even model year vehicles must be tested during even-numbered years and odd model year vehicles must be tested during the odd-numbered years.

Diesel Vehicles:
All diesel-fueled vehicles equaling 10,000 pounds gross vehicle weight rating (GVWR) or less must be tested.

Exemptions:
1. New vehicles for the newest four (4) model years
2. Vehicles that are 26 model year old or older
3. Vehicles with a GVWR of more than 10,000 lbs
4. Vehicles registered as “historical” or “collector” vehicles
5. Recreational vehicles and motor homes
6. Parade and exhibition vehicles
7. Electric vehicles (one-time verification inspection required)

For more information visit: http://www.epa.state.oh.us/dapc/mobile.aspx


OKLAHOMA

None.


OREGON

Oregon’s Department of Environmental Quality requires emissions testing in the Portland and Medford metropolitan areas prior to registration and as a part of the registration renewal process.  

Diesel Vehicles:
Diesel vehicles in the metropolitan areas of Portland and Medford with a GVWR of 8,500 lbs or less are required to undergo emissions testing, but are provided with the same exemptions provided to gasoline powered vehicles in those areas.

Exemptions:
1. Pre-1975 model year vehicles (Portland)
2. Vehicles that are 21 model year old or older (Medford)

For more information visit:
http://www.oregon.gov/deq/Vehicle-Inspection/Pages/Portland-Required-to-Test.aspx


PENNSYLVANIA

Pennsylvania requires emissions inspections annually the counties of Allegheny, Beaver, Berks, Blair, Bucks, Cambria, Centre, Chester, Cumberland, Dauphin, Delaware, Erie, Lackawanna, Lancaster, Lebanon, Lehigh, Luzerne, Lycoming, Mercer, Montgomery, Northampton, Philadelphia, Washington, Westmoreland and York. The emissions inspection is to be completed before or with the annual safety inspection.   

Diesel Vehicles:
Diesel vehicles are not tested for emissions.

Exemptions:
1. New vehicles with less than 5,000 miles on the odometer is exempt for one year after the first registration.  
2. Pre-1975 model year vehicles
3. Vehicles with a GVWR of more than 9,000 lbs
4.  Vehicles registered as classics, antiques, collectibles, street rods, and specially constructed.

For more information visit:
http://www.drivecleanpa.state.pa.us/default.htm


RHODE ISLAND

Rhode Island requires biennial emissions inspections to be conducted in conjunction with safety inspections.   

Diesel Vehicles:
Diesel vehicles with a GVWR of 8500lbs or less are required to be tested for Safety and Emissions. Vehicles 1997 and newer may be tested at any Authorized Safety and Emissions Inspection Station. Vehicles 1996 and older must pass a diesel opacity test at one of the Diesel Opacity Stations. Heavy duty diesel powered vehicles (weighing over 8500 pounds) must be inspected annually at an "A" Class inspection station.

Exemptions:
1. New vehicles for first (2) model years or 24,000 miles, whichever comes first
2.  Vehicles registered as antiques
3.  Motor vehicles 25 years old or older must undergo inspection for safety and emissions, but are not failed if they do not pass emissions standards
4.  Vehicles insured as classic vehicles.
5.  Vehicles manufactured as kit cars may receive an alternate type of inspection.

For more information visit:
http://www.riinspection.org/overview.htm 


SOUTH CAROLINA

None.


SOUTH DAKOTA

None.


TENNESSEE

Annual emissions inspections must be passed prior to registration and registration renewal in the counties of Hamilton, Davidson, Rutherford, Sumner, Williamson and Wilson and in the city of Memphis.   

Diesel Vehicles:
Diesel vehicles are treated the same as gasoline powered vehicles for emission inspection purposes.

Exemptions:
1. Pre-1975 model year vehicles
2. Vehicles with a GVWR of more than 10,500 lbs
3. Vehicles with antique registration and plates

For more information visit: http://www.tn.gov/environment/topic/apc-vehicle-inspection-program 


TEXAS

Annual emissions inspections must be passed prior to registration and registration renewal in the counties of Brazoria, Fort Bend, Galveston, Harris, Montgomery, Collin, Dallas, Denton, Ellis, Johnson, Kaufman, Parker, Rockwall, Tarrant, Travis, Williamson and El Paso.

Diesel Vehicles:
Diesel vehicles are not tested for emissions.

Exemptions:
1. New vehicles for the newest two (2) model years
2. Vehicles with antique registration and plates
3. Vehicles 25 years old or older

For more information visit: https://www.dps.texas.gov/RSD/VI/consumerinfo/emissionTesting.htm


UTAH

All vehicles registered in Davis, Salt Lake, Utah and Weber counties with model years less than six years old are required to have an emission test once every two years. Vehicles in this category that have even-numbered model years must have an emission test in even-numbered years, and vehicles that have odd-numbered model years must have an emission test in odd-numbered years. Vehicles with model years six years old and older (to 1967) must have an emission test every year.

Cache County vehicles with model years six years old and greater that have even-numbered model years, must have an emission test in even number years, and vehicles with odd-numbered model years must have an emission test in odd-numbered years. Vehicles with model years 1968 or older do not require an emission test.

Diesel Vehicles:
Diesel vehicles are treated the same as gasoline powered vehicles for emission inspection purposes except emissions tests are not required for diesel vehicles registered in Utah county.

Exemptions:
1. New Vehicles
2. Pre-1968 model year vehicles
3. Vehicles registered as "vintage vehicles" or "custom"

For more information visit:
http://dmv.utah.gov/register/inspections


VERMONT

On-board diagnostic systems (OBD) on 1996 and newer vehicles are checked as part of Vermont’s annual vehicle safety inspection.

Diesel Vehicles:
Diesel vehicles with a GVWR of 8,500 lbs or less with a model year of 1997 or newer are required to undergo emissions testing.

Exemptions:
1. Pre-1996 model year vehicles
2. Vehicles with a GVWR of more than 8,500 lbs

For more information visit:
https://www.dmv.virginia.gov/vehicles/#emissions.asp


VIRGINIA

Annual emissions inspections are required for vehicles registered in the counties of Arlington, Fairfax, Loudoun, Prince William, and Stafford and cities of Alexandria, Fairfax, Falls Church, Manassas, and Manassas Park and must be passed prior to vehicle registration and registration renewal.

Diesel Vehicles:
All 1997 model year and newer diesel powered vehicles with a gross vehicle weight rating up to and including 8,500 pounds are required to undergo emissions inspections.

Exemptions:
1. New vehicles being titled for the first time for the first two years of registration
2. A vehicle with a model year of 25 years old or older
3. Vehicles with a GVWR of more than 10,000 lbs
4. Electric or other clean vehicles

For more information visit:
https://www.dmv.virginia.gov/vehicles/#emissions.asp


WASHINGTON

Washington requires emissions testing in the year that a vehicle license is to expire (every other year) in certain zip codes within Clark, Snohomish, Spokane, King and Pierce counties. A test is also required for a transfer of ownership of a vehicle, unless the vehicle was tested within 365 days of the transfer.

Diesel Vehicles:
All diesel-powered passenger vehicles weighing less than 6,001 pounds and all diesel vehicles model year 2007 and newer, regardless of weight are exempt from emissions inspections.

Exemptions:
1.  Motor vehicles that are less than five years old or more than twenty-five years old.
2. 2009 and newer models.
3. Hybrid Vehicles (specifically Toyota Prius and Honda Insight)
4. Street rod vehicles.
5. Vehicles with CARB (California Air Resources Board) Certification 

For more information visit:
http://www.emissiontestwa.com/e/faq.aspx


WEST VIRGINIA

None.


WISCONSIN

Emissions inspections are required for vehicles registered in Kenosha, Milwaukee, Ozaukee, Racine, Sheboygan, Washington and Waukesha counties of Wisconsin every other year at the time of license plate renewal. Vehicles more than five model years old require inspection within 45 days following registration by a new owner.

Diesel Vehicles:
All 2007 model year and newer diesel powered vehicles with a GVWR of up to 14,000 lbs are required to undergo emissions inspections.

Exemptions:
1. Vehicles manufactured before 1996.
2. Vehicles manufactured after 1996 that are not OBDII-compliant (must be verified at a test station).
3. A motor vehicle of a model year of 2006 or earlier that has a GVWR exceeding 8,500 pounds, and a motor vehicle of a model year of 2007 or later that has a GVWR exceeding 14,000 pounds
4.  Vehicles with a registered gross weight over 14,000 lbs.
5.  Vehicles registered as special design vehicles, Medal of Honor, and apportioned plates.
6. Electric vehicles

For more information visit:
http://www.wisconsinvip.org/WivipPublic/


WYOMING

None.


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