
The Missouri emissions testing program applies to vehicles registered in these four places:
- St. Louis City
- St. Louis County
- Franklin County
- Jefferson County
- St. Charles County
- St. Louis City.
- St. Louis County.
- Franklin County.
- Jefferson County.
- St. Charles County.
What are the emissions testing requirements in Missouri?
The State of Missouri requires emissions testing in the following parts of the state for gasoline vehicles made in the 1996 model year or later, and diesel vehicles made in the 1997 model year or later that weigh less than 8500 lbs: St. Louis City; St. Louis County; Franklin County; Jefferson County; St. Charles County
What counties in Missouri require smog checks?
Jefferson County is one of the counties parts of the St. Louis Metropolitan area which requires smog checks. Missouri-registered drivers with vehicles that require testing, and living in or around the St. Louis area may have to get their vehicles to pass an emissions inspection.
Will removing Missouri counties from emissions inspection program put federal funds at risk?
With just hours left in their 2021 session, Missouri lawmakers passed legislation removing several St. Louis area counties from a federally-mandated emissions inspection program, potentially putting millions of dollars in federal funds at risk.
Which motor vehicles are exempt from the emissions inspection requirement?
The following motor vehicles are exempt from the emissions inspection requirement: New motor vehicles, not previously titled, during the model year of the vehicle and the following year, provided there is no change in ownership. 1995 and older gasoline-powered vehicles 1996 and older diesel-powered vehicles

Do all cars need emissions test in Missouri?
Missouri law requires all motor vehicles to pass a vehicle safety inspection performed by an authorized Missouri inspection station, unless exempt as detailed below. The renewal notice you receive from the Department of Revenue will assist you in determining if your vehicle needs to have a safety inspection.
What year vehicles are exempt from emissions in Missouri?
The Missouri measure also exempts all vehicles 26-years old and older from emissions inspections. The 26-year rolling emissions test exemption will replace current law which only exempts vehicles manufactured prior to the 1971 model year.
Did Missouri do away with emissions testing?
JEFFERSON CITY, MO, JUNE 8, 2022 - Beginning July 1, owners of vehicles registered in Franklin County no longer need an emissions test to register their vehicles. The Missouri Air Conservation Commission adopted an amendment to the state regulation in January 2022.
Does St Louis County require emissions?
Louis, and the counties of St. Charles, St. Louis and Jefferson are still subject to emissions inspection requirements.
How do I get a Missouri emissions waiver?
Vehicle owners must fill out and submit a notarized Out of Area Waiver Request to the Department of Natural Resources, at PO Box 176 Jefferson City Missouri 65102 to apply and be considered for the exemption.
Will car pass inspection with check engine light on in Missouri?
The inspector mechanic will plug a computer device into the OBDII data port of a vehicle and test the emissions system. If a certain number of monitors have run, and if the “Check Engine Light” is not illuminated, the vehicle will pass the Missouri emissions inspection.
What year cars need inspection in Missouri?
Your vehicle will need to be inspected once every two years by an authorized service provider. If your car or truck has a model year that is even, it will need to be inspected during even years. In turn, if your vehicle model is odd, you have to get your vehicle inspected during odd years.
How often do I need an emissions test in Missouri?
once every two yearsIn Missouri, most vehicles are required to undergo a safety inspection once every two years unless the vehicle is within its first 5 model years or meets another exemption rule. Residents living in certain areas are also required to get smog and emissions testing in addition to the safety inspection.
How much does a Missouri emissions test cost?
$24The emissions test is $24 and the safety inspection is $12. Send an email to report a station that charged more than this.
Does St Charles County require emissions testing?
Unless exempt, your vehicle must pass a safety inspection once every two years. Residents living in certain areas, including St. Charles County, must also pass a smog or emissions test in addition to the safety inspection.
Does Jefferson County require emissions?
Emissions testing of gas‑ and diesel‑powered vehicles is required when registering or selling vehicles in Boulder, Broomfield, Denver, Douglas, and Jefferson counties, and in portions of Adams, Arapahoe, Larimer, and Weld counties, as shown in the Air Care Colorado program area maps.
Will a cracked windshield pass inspection in Missouri?
Any cracks, chips or areas of discoloration that are located within an area four inches above the bottom of the windshield and within the swipe of the windshield wipers in the driver's view are not permitted.
Does my car need safety and emissions this year Missouri?
In Missouri, most vehicles are required to undergo a safety inspection once every two years unless the vehicle is within its first 5 model years or meets another exemption rule. Residents living in certain areas are also required to get smog and emissions testing in addition to the safety inspection.
What year cars need inspection in Missouri?
Your vehicle will need to be inspected once every two years by an authorized service provider. If your car or truck has a model year that is even, it will need to be inspected during even years. In turn, if your vehicle model is odd, you have to get your vehicle inspected during odd years.
Is a catalytic converter required in Missouri?
Do I need a catalytic converter in Missouri? Yes. According to Missouri's Code of State Regulations, all vehicles 1981 or newer must have their OEM catalytic converter or an EPA-approved replacement.
Missouri Vehicle Inspection Exemptions
You may be exempt from the Missouri safety inspection if your vehicle: 1. Is 5 model years old or newer. 2. Weighs 26,000 lbs. or more AND is regis...
MO Safety & Emissions Inspection Fees
Motor vehicle inspection fees in Missouri vary between stations, but state law caps how much may be charged. All fees include one free retest shoul...
MO Out-Of-State Vehicle Inspection Extension
If your vehicle is located out of state when your registration renewal date and mandatory inspection arrives, you will be granted an extension, pro...
Failed Missouri Vehicle Inspections & Waivers
If a vehicle fails an inspection, you will need to get the vehicle repaired and retested before you can register it. You can get your vehicle repai...
What year does Missouri require emissions testing?
The State of Missouri requires emissions testing in the following parts of the state for gasoline vehicles made in the 1996 model year or later, and diesel vehicles made in the 1997 model year or later that weigh less than 8500 lbs:
Which county in Missouri requires smog?
Jefferson County is one of the counties parts of the St. Louis Metropolitan area which requires smog checks. Missouri-registered drivers with vehicles that require testing, and living in or around the St. Louis area may have to get their vehicles to pass an emissions inspection.
What is an OBDII test in Missouri?
On-Board Diagnostic Tests: Missouri’s Gateway Vehicle Inspection Program will administer an ODBII test on most motor vehicles made in the 2000 or newer model years. The OBDII system installed in U.S. manufactured vehicles made in the 1996 and newer model years is a mechanical issue early-warning system. The system records the vehicle’s performance by administering a specific kind of test referred to as a “Monitor”. Certain monitors test a vehicle’s primary emissions components and subsystems. While the key is in the ignition and the engine is off, a test technician will make sure the vehicle’s DLC (Data Link Connector) works properly. Then, the test technician hooks an emissions diagnostic tool up to your vehicle’s DLC using a cable to allow the technician’s diagnostic tool to communicate with the vehicle’s OBD II system. The Missouri GVIP test technician can check your vehicle’s engine and emissions systems, and see if any monitors state a “Not Ready” status. The test personnel can complete the test in around 2 minutes.
How much does a smog check cost in Missouri?
The Missouri smog check fee is $24 and the safety inspection fee is $12. The first retest done within 20 business days of the initial smog check is free.
How long do you have to be out of the area to get a vehicle emission test in Missouri?
Vehicle owners who live in one of the “covered” locations in the State of Missouri requiring vehicle emissions testing and who are out of the area for at least 24 months prior to their testing deadline can apply for an Out of Area Waiver.
Where is the smog check station in Missouri?
Smog Check Stations in O’Fallon, Missouri. The city of O’Fallon, in Saint Charles County, Missouri, part of Saint Louis, Missouri metropolitan area has a population of 80,000. Missouri-registered drivers with vehicles that require testing, and living in and around St. Louis may have to get their vehicles to pass an emissions inspection.
When to get your vehicle tested in Missouri?
Missouri vehicle owners may want to get their vehicles tested as soon as they receive their first testing notice. Allow extra time to get any needed repairs done before your registration expires. Also, if a vehicle owner plans to be out of town during the date when their registration expires, planning early will give owners time to meet the deadline. Here are some tips to keep in mind to ensure passing a Missouri vehicle emissions test:
How to get exemption from Missouri emissions testing?
Request for exemption from Missouri emissions testing if you meet the city and mileage requirements. Submit to the Department of Natural Resources.
What county is MO vehicle inspection?
Additionally, your car must pass emissions inspections if you live in the city of (334) 517-2800 or one of the following counties: St. Louis. St. Charles.
How many miles does a new vehicle have to have to pass a smog test?
For residents of counties that do require smog tests, emissions inspection exemptions may include the following: A brand new vehicle within its first model year (exempt during its current year and the following year), with an odometer reading of less than 6,000 miles.
How old is a vehicle inspection certificate in Missouri?
The seller of a vehicle in Missouri is required to supply the buyer with: A safety inspection certificate less than 60 days old. An emissions inspection certificate less than 60 days old, if you live in a county that requires smog testing.
What happens if a vehicle fails an inspection in Missouri?
If a vehicle fails an inspection, you will need to get the vehicle repaired and retested before you can register it. You can get your vehicle repaired at any mechanic, but you may want to use a Missouri Recognized Repair Technician ( MRRT) if you think you may need an inspection waiver due to extensive repairs.
How long does it take to renew a vehicle registration in Missouri?
You want to renew your MO registration and your renewal notice indicates that you must complete a vehicle safety and/or emissions inspection (these can be completed no earlier than 60 days before you renew your registration). You recently sold or intend to sell a vehicle (i.e. the vehicle will undergo a title change).
How long does it take to register a car in Missouri?
New residents in Missouri have 30 days to register a vehicle —and in order to do so, you must have proof of a current vehicle inspection. All vehicles are required to have a safety inspection before they can be registered. in addition to the safety inspection, some counties require residents to have their cars pass an emissions inspections.
