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Vehicle inspection in the United States

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Vehicle inspection laws by state:
  Periodic safety inspection required
  VIN inspection required upon sale or transfer
  Safety inspection required when registering a vehicle from another jurisdiction
  Emissions testing required in some areas
  Emissions testing required in all areas
  No inspection required
Striped: Both safety and emissions testing required

In the United States, vehicle safety inspection and emissions inspection are governed by each state individually. Fifteen states have a periodic (annual or biennial) safety inspection program, while Maryland requires a safety inspection and Alabama requires a VIN inspection on sale or transfer of vehicles which were previously registered in another state. An additional 16 states require periodic emissions inspections.

In 1977, the federal Clean Air Act was amended by Congress to require states to implement vehicle emissions inspection programs, known as I/M programs (for Inspection and Maintenance), in all major metropolitan areas whose air quality failed to meet certain federal standards. New York's program started in 1982, California's program (Smog Check) started in 1984, and Illinois's program started in 1986. The Clean Air Act of 1990 required some states to enact vehicle emissions inspection programs. States impacted were those in metropolitan areas where air quality did not meet federal standards.[1] Some states, including Kentucky and Minnesota, have discontinued their testing programs in recent years with approval from the federal government. [citation needed]

List of jurisdictions

[edit]

Require periodic vehicle safety inspections

[edit]
PennDOT-issued sign at an auto garage in New Castle, Pennsylvania stating that it does vehicle inspections for cars.
  • Connecticut – not for passenger vehicles, but annually for certain commercial vehicles, trucks, grey market, salvage, and several types of trailers.[2]
  • Delaware – annually or biennially, new cars are exempt from inspection for the first seven years provided the car remains with the same owner.
  • District of Columbia—biennially for publicly owned vehicles only,[3] the requirement for safety inspection for privately owned cars ended October 1, 2009.[4]
  • Hawaii – annually, with the following exceptions: Brand new vehicles receive an inspection valid for two years. Emergency vehicles, school vehicles, rental cars, and vehicles used in public transportation must be inspected every six months. Sticker placed on rear bumper to right on license plate.
  • Louisiana – annually. However, as of September 2012, people in most jurisdictions have the option of getting a sticker good for two years, rather than one, by paying double the usual fee.[5] In most of south Louisiana, inspection stickers are commonly referred to as "Brake Tags"; they are placed on the inside of the windshield, in the lower left corner of the windshield (on the driver's side). Colors change every year.
  • Maine – annually. Color of sticker changes annually. School buses are inspected every six months. Vehicles registered as Antique Autos are exempt. Sticker placed in top center of windshield behind rear view mirror or lower left-hand corner of windshield.[6][7]
  • Maryland – when registering vehicles from another state.[8] When a used vehicle is purchased.[9]
  • Massachusetts – annually.[10] Stickers are placed in the lower right corner of the windshield.
  • Missouri – biennially, based on the vehicle's model year. Odd-numbered model year renews in odd-numbered year, even-numbered model year renews in even-numbered year. Effective August 28, 2019, motor vehicles for the first ten years following the model year of manufacture and having less than 150,000 miles on the odometer are exempt from the safety inspection requirement.[11] Vehicles displaying historical plates are completely exempt from inspection.[12]
  • New Hampshire – annually, except the first inspection of a new vehicle or upon an ownership transfer is adjusted to expire in the month of the registrant's birthday and is therefore valid for 4 to 15 months.[13] Sticker placed in lower driver corner of the windshield.[14]
  • New Jersey – annually for commercial vehicles (including taxis, limousines, jitneys, and buses), effective January 1, 2010. Passenger vehicles are exempt from safety inspections, effective August 1, 2010.[15]
  • New York – annually. Color of sticker changes annually. Newly registered vehicles with a current inspection sticker from another state are exempt until the out-of-state sticker expires or for one year after registration in New York, whichever is sooner. Vehicles registered as farm vehicles are exempt. Stickers are placed on the lower left corner of windshield.
  • North Carolina – annually until the vehicle is 30 years of age, at which point inspections are no longer required.
  • Pennsylvania[16] – annually for most vehicles; every six months for school vehicles (including school buses and school vans), motor coaches, mass transit buses, etc. Stickers are placed on the lower driver's side corner of the windshield. Vehicles bearing antique vehicle license plates are exempt from inspection, but vehicles bearing classic or collectible license plates are subject to inspection. Trailers in excess of 3,000 pounds (1,400 kg) GVW are also inspected annually as are motorcycles.
  • Rhode Island – biennially; newly registered vehicles are exempt from the inspection requirement for two years from the date of purchase. Vehicles registered as antiques are subject to safety inspection, but are exempt from emissions testing. Stickers are placed on lower-right corner of windshield.
  • Texas – new vehicles are sold with an inspection decal which expires two years after the sale of the vehicle. Annually thereafter and for Motorcycles. The inspection decal is placed in the lower left corner of the windshield near the registration decal. As of March 1, 2015, the inspection decal was eliminated and proof of inspection will be required to renew the registration. Any vehicle registered as antique 25 years or older does not need safety inspection. Beginning January 1, 2025, safety inspections will no longer be required.[17]
  • Vermont – annually; inspections are due at the end of even-numbered months only. Inspections performed in an odd-numbered month will receive a sticker for the next even-numbered month (e.g., a car inspected in November 2011 will receive a sticker good until December 31, 2012). Inspection stickers are placed on the lower left of windshield[18]
  • Virginia[19] – annually.[20] Newly registered vehicles with a valid inspection from another state are not exempt from inspection until the out-of-state inspection expires. As soon as a vehicle is registered in Virginia, that vehicle must have a Virginia safety inspection. Primarily yellow; background color of year digits changes annually. Placed in the lower left part of the windshield (lower center windshield before January 1, 2018). Beginning January 2019 the color of Virginia's inspection stickers changed from yellow to blue.[21]
  • West Virginia[22] – Biennially as of 1/1/2024;[23] color of sticker changes biennially; sticker placed in lower left corner of windshield.

Require inspection only prior to sale or transfer of ownership

[edit]
  • Alabama[24] VIN only
  • Maryland[25] safety

Require safety inspection only when bringing vehicle from another jurisdiction

[edit]

Require periodic vehicle emissions inspections

[edit]
Vehicle emissions inspection station in Wisconsin
  • Arizona – biennially, in Phoenix and Tucson metro areas only, depending on age and type of vehicle.[28]
  • California – biennially for all vehicles from out-of-state, regardless of age; and all vehicles made after 1975 which are more than six years old in all or some zip codes in 41 out of 58 counties.[29]
  • Colorado – biennially, except for vehicles seven years old and newer. Required in Boulder, Broomfield, Denver, Douglas, and Jefferson Counties, and parts of Adams, Arapahoe, Larimer, and Weld Counties.[30]
  • Connecticut – biennially.[31]
  • Delaware – annually or biennially. Older cars registered as antiques are exempt from emissions testing.
  • District of Columbia – biennially.[32]
  • Georgia – annually for gasoline-powered cars or light-duty trucks (8,500 pounds GVWR or less), required only in the 13 metro Atlanta counties (Cherokee, Clayton, Cobb, Coweta, DeKalb, Douglas, Fayette, Forsyth, Fulton, Gwinnett, Henry, Paulding and Rockdale). The three most recent model year vehicles and those that are 25 model years or older are exempt from emissions testing, as well as all motorcycles, recreational vehicles (RVs), motor homes and diesel-powered vehicles.[33]
  • Idaho – no longer required as of July 2023.[34]
  • Illinois – biennially after the vehicle is four years old. Required only in the Chicago metropolitan area and eastern suburbs of St. Louis, Missouri.[35]
  • Indiana – biennially, required in Lake County and Porter County (Chicago metropolitan area)/Northwest Indiana only.
  • Louisiana – annually, only in the Baton Rouge metropolitan area parishes of Ascension, East Baton Rouge, Iberville, Livingston, and West Baton Rouge. Cars registered in these five parishes must be inspected in one of the five parishes; cars from outside those parishes (excluding the cities of New Orleans, Kenner and Westwego) may be inspected in the Baton Rouge area.
  • Maine – annually, only in Cumberland County.[36] Also required by ordinance in Sanford, Maine but unenforced as many go to other towns to get inspected car and police cannot arrest or decline registration or inspection of Sanford car as its not mentioned in state law[clarification needed] .
  • Maryland – biennially, required in 13 (out of 23) counties and the independent city of Baltimore.[37] The most recent two model years of vehicles are exempt from emissions testing.[38]
  • Massachusetts – annually, as of 2008. Vehicles less than 15 years old must pass an OBD-2 scan for emissions system compliance. Vehicles over 15 years old receive a visual check and must not 'produce visible smoke'. Prior to 2008, an emissions inspection was required biennially based on the vehicle's model year (odd-numbered model years were inspected in odd-numbered years, even-numbered model years were inspected in even-numbered years). Also in 2008, the tailpipe test for 1995 model year and older vehicles was discontinued.[39]
  • Missouri – biennially, based on the vehicle's model year, required only in St. Louis City, St. Louis County, St. Charles County, Franklin County, and Jefferson County.[12]
  • Nevada – required only in the urban areas of Clark County (Las Vegas) and Washoe County (Reno) for most vehicles. New vehicles in their first or second years of registration, hybrid vehicles five model years old or less, diesel vehicles with a gross vehicle weight of 14,000 lb. or more, 1967 or older vehicles, motorcycles/mopeds, and certain other vehicles are exempt.[40]
  • New Hampshire – annually, except the first inspection of a new vehicle or upon an ownership transfer is adjusted to expire in the month of the registrant's birthday and is therefore valid for 4 to 15 months. Emissions inspection is required only for model year 1996 and newer vehicles that are less than 20 years old.[41]
  • New Jersey – biennially. Effective January 1, 2010, commercial vehicles (including taxis, limousines, jitneys, and buses) are subject to an annual inspection. Effective August 1, 2010, new non-commercial vehicles are exempt for the first five years. Used non-commercial vehicles are also exempt for the first five model years, as indicated on the New Car Dealer inspection decal. Used non-commercial vehicles originally purchased outside of New Jersey will receive a decal valid for five years from the model year of the vehicle. Effective August 1, 2010, vehicles exempt from inspection include motorcycles, non-commercial diesel vehicles between 8,500 pounds (3,900 kg) and 10,000 pounds (4,500 kg) GVWR or older than model year 1997 and under 10,000 pounds (4,500 kg) GVWR, diesel trucks between 10,000 pounds (4,500 kg) and 18,000 pounds (8,200 kg) GVWR (subject to self-inspection), farm vehicles, collector vehicles, historic vehicles, trailers, and mopeds.[15] Effective May 2016, cars 1995 and older are no longer subject to emissions inspection.[42] Sticker is placed on the lower left corner of windshield.
  • New Mexico – biennially, required only for vehicles 1983 and newer registered in, or commuting to Bernalillo County (which includes the state's largest city of Albuquerque).
  • New York – annually. Newly registered vehicles with a current inspection sticker from another state are exempt until the out-of-state sticker expires or for one year after registration in New York, whichever is sooner. Model year 1996 and newer vehicles are subject to an OBD-II emissions inspection, while older cars receive a visual check of emissions components. Until December 31, 2010, vehicles registered in the five boroughs of New York City, as well as on Long Island, in Westchester County or in Rockland County required a tailpipe smog-test if they are not OBD II equipped (they now receive a visual only check of emissions control devices). All OBD II vehicles in those areas (1996 model year or newer, 1997 and newer for diesel) require and OBD II test plus a visual check of emissions components. Any vehicle 26 model years old or more does not require an emissions check of any sort, and vehicles 2 model years old or newer are exempt. Diesel trucks over 8500 lbs. GVWR are required to have a diesel emissions inspection if they are registered in the NYC metropolitan area.
  • North Carolina – annually, required for vehicles in 19 (out of 100) counties, for vehicles newer than 20 years old. Effective November 1, 2008, no inspection decal is issued upon passing. All state inspection records both emissions and safety are now kept via electronic database, and are required for being awarded new license plates, and/or registration. Effective April 1, 2015, vehicles that are within the last three model years (including the current model year) and have fewer than 70,000 miles on the odometer are exempt from emissions inspection.[43]
  • Ohio – currently required only in the Cleveland metropolitan area (Cuyahoga County, Geauga County, Lake County, Lorain County, Medina County, Portage County, and Summit County). Vehicles up to four years old are exempt. Testing is based on an odd-even year system. Cars purchased in 2000 were not required to be tested until 2010, while cars purchased in 2003 had to be tested in 2009. Ohio does not charge a fee for emission testing, due to Ohio's tobacco settlement.
  • Oregon – required only (1975 and newer) in the Portland and Medford metro areas[44]
  • Pennsylvania[16] – annually for most vehicles under 9,000 pounds (4,100 kg) GVW. Required in 25 (out of 67) counties. Diesel-powered vehicles are exempt from emissions inspection.[45]
  • Rhode Island – biennially.
  • Texas – annually for the following counties: Brazoria, Collin, Dallas, Denton, El Paso, Ellis, Fort Bend, Galveston, Harris, Johnson, Kaufman, Montgomery, Parker, Rockwall, Tarrant, Travis, and Williamson. Bexar County will begin requiring emissions tests in 2026.[17] Vehicles more than 2 model years old and up to 24 model years old are subjected to the annual emission tests (pre-OBDII automobiles registered in the Houston Metro area and DFW Metroplex are tested using the accelerated simulation mode while four-wheel drive/all wheel drive automobiles, light trucks, vans, and SUVs over 8500GVW, continue to use the two-speed idle test (Travis/Williamson and El Paso Counties use the TSI test for pre-1996) – anything over 25 model years old – including those registered as an antique or classic, are exempted from emission testing. Motorcycles and diesel vehicles are exempt from any state emissions testing.[46] As of 2021, pre-OBDII emissions testing is obsolete in the State of Texas.
  • 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 and Vehicles with model years six years old and older (to 1967) must have an emission test every year. Emission certificates are not required for vehicles with model years 1967 or older. All vehicles registered in Cache County 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.[47]
  • Vermont – annually, done at time of State Inspection 1996 and new with OBDII, some cars are exempt
  • Virginia – biennially, in conjunction with registration renewal, required only in urban and suburban jurisdictions in Northern Virginia.[48] Newly registered vehicles with a valid inspection from another state are NOT exempt from inspection until the out-of-state inspection expires. A vehicle registered in Virginia must have a Virginia safety inspection.
  • Wisconsin – biennially, required only in Kenosha County, Milwaukee County, Ozaukee County, Racine County, Sheboygan County, Washington County, and Waukesha County. Vehicles manufactured before 1996 are exempt from testing.

Require VIN inspection

[edit]
  • California – Required when registering an out-of-state vehicle
  • Colorado – Required when registering an out-of-state vehicle
  • Connecticut – Required when registering an out-of-state vehicle
  • Delaware - Required when registering an out-of-state vehicle
  • Florida – Required when registering an out-of-state vehicle
  • Idaho – Required when registering an out-of-state vehicle[49]
  • Illinois – The main VIN tag is inspected at emissions testing stations. If the VIN tag is not acceptable or is missing, the vehicle is "rejected" for emissions testing.[50] Emissions testing is required biennially only for vehicles registered in specific counties and zip codes (see above).
  • Indiana – required when registering an out of state vehicle
  • Kansas – Required when registering an out-of-state vehicle
  • Kentucky – Required when registering an out-of-state vehicle
  • Maine – Required to match VIN with registration as part of the annual safety inspection.[51] A tracing verification of the VIN is not part of the inspection.
  • Missouri – Required when registering an out-of-state vehicle
  • Montana - Required when titling a vehicle with no title but a clean VIN report. Only to verify the VIN matches the bill of sale for vehicles with no title.
  • Nebraska – Required when registering an out-of-state, rebuilt, or salvage title vehicle
  • Nevada – Required when registering an out-of-state vehicle for the first time in the state [52]
  • New Mexico – Required when registering an out-of-state vehicle
  • Ohio – Required when registering an out-of-state vehicle
  • Oklahoma – Required when registering an out-of-state vehicle
  • Oregon – Required when registering an out-of-state or new-to-Oregon vehicle.[53]
  • Pennsylvania – Required as part of the annual safety inspection. The inspection procedure only requires checking the main VIN tag.[54] A tracing or visual verification of the VIN by an inspection mechanic or notary is also required when registering an out-of-state vehicle.
  • Rhode Island – Required when registering an out-of-state vehicle
  • Tennessee - Required when registering vehicles with salvage titles that have been declared rebuilt.[55]
  • Texas – Required when registering an out-of-state vehicle; however, the VIN is inspected as part of the required safety inspection, so no additional effort is required.
  • Utah - Required when registering an out-of-state vehicle[56]
  • Vermont – Required when registering out-of-state vehicle[57]
  • Washington – Required only when registering an out-of-state vehicle for the first time in the state,[58] or for rebuilt vehicles[59]
  • Wyoming – Required when registering an out-of-state vehicle

No safety, emissions, or VIN inspections

[edit]
  • Alaska[60]
  • Arkansas
  • Iowa
  • Michigan
  • Minnesota
  • Mississippi
  • North Dakota
  • South Carolina
  • South Dakota
  • Washington

Non-commercial vehicles

[edit]
State Periodic safety inspections Periodic emissions inspections
Alabama no no
Alaska no no
Arizona no biennially for Phoenix and Tucson metros
Arkansas no no
California no biennially for cars from out-of-state or in-state cars 7 or more years old in all or some zip codes in 41 of 58 counties
Colorado no biennially in all or parts of 9 out of 64 counties, except for vehicles 7 model years old and newer
Connecticut no biennially
Delaware biennially biennially
District of Columbia no biennially
Florida no no
Georgia no annually for Atlanta metro
Hawaii annually no
Idaho no no – (since July 1, 2023[61])
Illinois no biennially for Chicago and St. Louis metros (1996 model year and newer)
Indiana no biennially for Lake and Porter counties
Iowa no no
Kansas no no
Kentucky no no
Louisiana annually[a 1]/biennially annually for Baton Rouge metro
Maine annually annually (for Cumberland County only)
Maryland no biennially for 13 of 23 counties and Baltimore
Massachusetts annually annually
Michigan no no
Minnesota no no
Mississippi no no
Missouri biennially biennially for St. Louis metro
Montana no no
Nebraska no no
Nevada no annually for urban areas of Clark and Washoe counties for most vehicles
New Hampshire annually annually (Models less than 20 years old)
New Jersey no exempt for first five years, then biennially
New Mexico no biennially for Bernalillo county only
New York annually annually
North Carolina annually annually for 19/100 counties
North Dakota no no
Ohio no odd/even for Cleveland metro
Oklahoma no no
Oregon no yes for Portland and Medford metros
Pennsylvania annually annually in 25 of 67 counties
Rhode Island biennially biennially
South Carolina no no
South Dakota no no
Tennessee no no – (since February 5, 2022[62])
Texas annually (As of January 1, 2025, vehicle safety inspections are no longer required for non-commercial vehicles) annually for large urban areas

Bexar County (San Antonio) emissions testing beginning on November 1, 2026

Utah no yes for four most populated counties
Vermont annually annually
Virginia annually biennially for urban and suburban northern Virginia
Washington no no – (since Jan 1, 2020 [63])
West Virginia biennially no
Wisconsin no biennially for select counties
Wyoming no no
  1. ^ New Orleans requires a "brake tag". In addition to the state requirements, if the vehicle is registered in New Orleans, the brakes must be tested annually with a short stop test.

See also

[edit]

References

[edit]

Car Inspection Requirements By State

[edit]
  1. ^ "What To Expect At Your Next Auto Inspection". CARCHEX. November 11, 2014. Retrieved July 27, 2015.
  2. ^ "CT.GOV".
  3. ^ "Vehicle Inspection". Dmv.dc.gov. Retrieved December 22, 2013.
  4. ^ Craig, Tim (September 15, 2009). ""D.C. Ending Safety Checks On Private Cars ," The Washington Post, September 15, 2009". Washingtonpost.com. Retrieved November 13, 2011.
  5. ^ "2-year vehicle inspection option takes effect today". Nola.com / The Times-Picayune / New Orleans Net LLC. Archived from the original on April 11, 2013. Retrieved February 20, 2013.
  6. ^ "Title 29-A, §1758: Issuance of sticker; placement on vehicle". legislature.Maine.gov. Retrieved November 15, 2017.
  7. ^ "State Police: Vehicle Inspections & Crashes: Motor Vehicle Investigations". Maine.gov. Retrieved November 13, 2011.
  8. ^ "New to Maryland Titling and Registering Your Vehicle Information". Retrieved September 18, 2020.
  9. ^ "Maryland Vehicle Safety Inspection". Retrieved September 18, 2020.
  10. ^ "Massachusetts Vehicle Check". Mavehiclecheck.com. Retrieved November 13, 2011.
  11. ^ "Motor Vehicle – Additional Resource Help". Retrieved January 25, 2015.
  12. ^ a b "Motor Vehicle – Additional Help Resource". Dor.mo.gov. January 1, 2010. Retrieved November 13, 2011.
  13. ^ "Saf-C 3200". Retrieved January 25, 2015.
  14. ^ "NH DMV Announces Changes to Inspection Program | Division of Motor Vehicles | NH Department of Safety". www.nh.gov. Retrieved October 2, 2017.
  15. ^ a b "State of New Jersey – Motor Vehicle Commission". State.nj.us. Retrieved November 13, 2011.
  16. ^ a b "PENNDOT Driver and Vehicle Services – Vehicle Safety Inspections". Dmv.state.pa.us. Retrieved November 13, 2011.
  17. ^ a b Chandler, Ryan (July 2, 2024). "Mandatory Texas vehicle safety inspections end in six months". KXAN. Retrieved July 4, 2024.
  18. ^ "Vt. DMV rolling out new inspection sticker system". March 16, 2022.
  19. ^ "Commonwealth of Virginia Department of Motor Vehicles". Dmv.state.va.us. May 14, 2007. Retrieved November 13, 2011.
  20. ^ "Virginia State Police – Safety Division". www.vsp.state.va.us. Retrieved November 15, 2017.
  21. ^ "Virginia State Police roll out changes to 2019 inspection stickers". January 22, 2019.
  22. ^ "Vehicle Inspection". Transportation.wv.gov. Retrieved September 27, 2016.
  23. ^ "Vehicle Inspection".
  24. ^ "Motor Vehicle Division – Registration FAQs". Ador.alabama.gov. Retrieved November 13, 2011.
  25. ^ "Vehicle Safety Inspection". Mva.maryland.gov. Retrieved November 13, 2011.
  26. ^ "Nebraska Department of Motor Vehicles". Dmv.state.ne.us. August 19, 2010. Retrieved November 13, 2011.
  27. ^ "VEHICLE INSPECTIONS Henderson County". Hendersonky.us. Retrieved January 6, 2021.
  28. ^ "Arizona Vehicle Emissions Program". Myazcar.com. Retrieved November 13, 2011.
  29. ^ "Smog Information". Dmv.ca.gov. Retrieved November 13, 2011.
  30. ^ "Automobile Inspection Program frequently requested information – Department of Public Health and Environment". www.Colorado.gov. Retrieved November 15, 2017.
  31. ^ "CT Emissions Testing". Ctemissions.com. March 17, 2003. Retrieved November 13, 2011.
  32. ^ "District of Columbia: Department of Motor Vehicles – Services – Inspections". Dmv.dc.gov. October 1, 2009. Archived from the original on December 7, 2011. Retrieved November 13, 2011.
  33. ^ "Georgia Clean Air Force". Cleanairforce.com. Retrieved January 29, 2015.
  34. ^ "Treasure Valley Vehicle Emissions Testing". deq.idaho.gov. Retrieved May 30, 2013.
  35. ^ "Air Team – Illinois Vehicle Emission Test Program". Epa.state.il.us. May 26, 2011. Retrieved November 13, 2011.
  36. ^ "Enhanced Vehicle Inspection & Maintenance". Maine Department of Environmental Protection.
  37. ^ "VEIP General Requirements". Mva.maryland.gov. Retrieved November 13, 2011.
  38. ^ "General Requirements". Mva.maryland.gov. Retrieved November 13, 2011.
  39. ^ "Information for Motorists: Basic Inspection Information". massvehiclecheck.state.ma.us. Retrieved June 5, 2015.
  40. ^ "Nevada Emissions Control Program". www.dmvnv.com. Retrieved November 15, 2017.
  41. ^ "Saf-C 3200". Gencourt.state.nh.us. Retrieved November 13, 2011.
  42. ^ "Big change coming for those who fail N.J. inspection for emissions". NJ.com. April 14, 2016. Retrieved November 15, 2017.
  43. ^ "Official NCDMV: Vehicle Emission Inspection". NCDOT. Retrieved July 14, 2020.
  44. ^ "Oregon DEQ: Air Quality Vehicle Inspection Program". Department of Environmental Quality. Retrieved May 14, 2016.
  45. ^ (PA DEP I/M – Drive Clean Pennsylvania Program Maps
  46. ^ "Texas Department of Public Safety – Inspection Criteria for the Annual SAFETY Inspection". www.txdps.state.tx.us. Retrieved November 15, 2017.
  47. ^ "Utah Vehicle Inspections". Dmv.utah.gov. December 29, 2015. Retrieved August 20, 2016.
  48. ^ Emissions Inspections, Virginia (U.S.A.) Department of Motor Vehicles
  49. ^ "Idaho Transportation Department". Archived from the original on May 25, 2016. Retrieved May 25, 2016.
  50. ^ "Vehicle Emissions Testing FAQs – Illinois AirTeam". Illinois AirTeam. October 13, 2016. Retrieved May 21, 2022.
  51. ^ "Archived copy" (PDF). Archived from the original (PDF) on February 21, 2017. Retrieved February 21, 2017.{{cite web}}: CS1 maint: archived copy as title (link)
  52. ^ "Nevada DMV New Resident Guide". www.dmvnv.com. Retrieved November 15, 2017.
  53. ^ "Oregon Department of Transportation : Vehicle Identification Number (VIN) Inspections : Oregon Driver & Motor Vehicle Services : State of Oregon". www.Oregon.gov. Retrieved November 15, 2017.
  54. ^ Pennsylvania inspection procedure Retrieved 2014-04-09
  55. ^ "Tennessee VIN Inspections Guide".
  56. ^ "Inspections". Archived from the original on December 2, 2021. Retrieved December 25, 2014.
  57. ^ "Vehicle Identification Number (VIN) – Department of Motor Vehicles". dmv.Vermont.gov. Retrieved November 15, 2017.
  58. ^ "WA State Licensing: Title and registration fees". Dol.wa.gov. Retrieved November 13, 2011.
  59. ^ "Vehicle Identification Inspections – Washington State Patrol". Wsp.wa.gov. December 21, 2010. Retrieved November 13, 2011.
  60. ^ "Alaska Emission Inspections and Requirements Information". Emissions.org. Retrieved April 16, 2018.
  61. ^ "Vehicle Emissions | Idaho Department of Environmental Quality". deq.idaho.gov. Retrieved January 14, 2024.
  62. ^ "Davidson County Vehicle Inspection Program | Nashville.gov". nashville.gov. Retrieved January 15, 2024.
  63. ^ "Washington State Department of Ecology – Emission checks ended". ecology.wa.gov. Retrieved January 3, 2020.
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