Missouri requires most vehicles to pass safety inspections every two years, while emissions testing is required only in St. Louis-area counties. Newer vehicles under 10 years old or with fewer than 150,000 miles are exempt from safety inspections, but once your car reaches either milestone, you’ll need biennial inspections that check brakes, lights, tires, and other critical safety components.
Understanding these inspection requirements becomes especially important if you’ve been in an accident. Insurance companies often examine whether vehicles involved in crashes had current inspections or known safety defects when determining fault and compensation.
In this definitive 2026 guide to Missouri car inspection laws by Beck & Beck Missouri Car Accident Lawyers, we detail everything drivers need to know about current state regulations and requirements.
What Are Missouri Car Inspection Requirements
Missouri requires two types of vehicle inspections to keep your car legal on the road. Safety inspections verify that your car’s critical components function properly and do not pose a risk to you or others.
Emissions inspections test your vehicle’s exhaust to ensure it doesn’t emit excessive pollution into the air. Not every Missouri driver needs an emissions test, but everyone with a qualifying vehicle needs a safety inspection.
Which Vehicles Need a Safety Inspection
Most cars, trucks, and motorcycles registered in Missouri must pass a safety inspection every two years. Your vehicle receives a free pass for the first 10 model years or 150,000 miles, whichever comes first.
Once your car loses its exemption, you’ll need to have it inspected in the correct year for your model year. This system helps spread out the workload for inspection stations across the state.
Which Counties Require an Emissions Test
Only five specific areas in Missouri require emissions testing along with your safety inspection:
- St. Louis City: All vehicles registered in the city limits.
- St. Louis County: Includes suburbs and unincorporated areas.
- St. Charles County: Covers areas like St. Peters and O’Fallon.
- Franklin County: Includes Union and other rural communities.
- Jefferson County: Covers Festus, Crystal City, and surrounding areas.
If you live anywhere else in Missouri, you only need the safety inspection.
How Often Do Inspections Happen
Missouri uses an even-odd year system that makes it easy to remember when your inspection is due. Vehicles with even model years get inspected in even calendar years, while odd model year vehicles get inspected in odd calendar years.
For example, if you drive a 2018 Honda, you’ll need inspections in 2028, 2030, 2032, and so on. If you have a 2019 Toyota, your inspections will be due in 2029, 2031, 2033, and beyond.
What Does My Car Need to Pass Inspection
Safety inspections focus on the parts of your car that keep you safe on the road. The inspector will check your brakes, lights, tires, windshield, mirrors, horn, and seat belts to ensure everything works properly.
Emissions testing uses special equipment to measure the gases coming from your exhaust pipe. Your car must meet Missouri’s standards for carbon monoxide, hydrocarbons, and nitrogen oxides to pass the test.
Missouri Car Inspection Exemptions
Missouri law exempts certain vehicles from the inspection requirement. These exemptions recognize that some vehicles pose less risk or have special circumstances that make regular inspections unnecessary.
Ten-Year and 150,000 Mile Exemption
New and newer vehicles don’t need safety inspections for their first decade on the road. Your car stays exempt as long as it’s under 10 model years old and has fewer than 150,000 miles on the odometer.
This exemption assumes that newer, lower-mileage vehicles are less likely to have safety issues. Once your car hits either the 10-year mark or 150,000 miles, it enters the biennial inspection cycle.
Historic and Low Speed Vehicles
Some specialty vehicles are permanently exempt from safety inspections. Historic vehicles displaying official historic license plates don’t require regular inspections because they’re typically driven very little and maintained by enthusiasts.
Low-speed vehicles that meet Missouri’s specific definitions are also exempt from the inspection requirement. These vehicles typically can’t travel fast enough to pose the same safety risks as regular cars and trucks.
Trailers and Special Registrations
Several other vehicle types avoid the inspection requirement based on their use or registration status:
- All trailers: Whether for boats, cargo, or travel, no trailers need safety inspections.
- Heavy commercial trucks: Vehicles over 26,000 pounds with short-term registrations are exempt.
- Interstate commerce vehicles: Trucks registered with the Missouri DOT for interstate hauling.
- Dealer transfers: When one licensed dealer sells to another licensed dealer.
These exemptions recognize that some vehicles already face federal inspection requirements or have limited public road use.
Selling or Buying a Car in Missouri
Missouri protects car buyers by requiring sellers to prove their vehicles are safe and legal. You can’t just hand over the keys and walk away when money changes hands.
Seller Inspection Certificates
When you sell your car in Missouri, you must provide the buyer with a safety inspection certificate that’s less than 60 days old. This rule applies whether you’re selling privately or you’re a dealer selling to a customer.
The recent inspection proves your car was safe when you sold it. This protects the buyer from unknowingly purchasing a vehicle with dangerous mechanical problems that could cause an accident.
Emissions Certificates in St Louis Area
If you want to sell a car in the St. Louis area, you might need to show a recent emissions certificate. To find out what the rules are in your area, you can call the Missouri Department of Revenue or your local emissions testing program. This requirement depends on where you sell the car, not where the buyer lives.
Even if the buyer plans to register the vehicle outside the emissions area, you still need to provide the certificate if the sale happens in St. Louis City, St. Louis County, St. Charles County, Franklin County, or Jefferson County.
Out-of-State Vehicle or Military
Sometimes your Missouri-registered vehicle might be out of state when its inspection comes due. The state recognizes this and provides a way to obtain additional time.
Extension Requirements and Form 768
Getting an inspection extension requires meeting specific conditions and filing the right paperwork before your registration expires:
- 60-day rule: To request an inspection extension, you may need to demonstrate that your vehicle was kept outside Missouri for a consecutive period.
- Form 768: You need to complete and notarize a General Affidavit explaining the situation.
- Timely filing: The form must be submitted to the Missouri Department of Revenue before your current registration expires.
Military personnel stationed outside Missouri commonly use this extension process. College students and workers on extended out-of-state assignments also qualify if they meet the requirements.
Inspection Timeline After Return
Once you receive an extension and return your vehicle to Missouri, the clock starts ticking quickly. You have exactly 10 days from your return date to complete the required inspection.
This short deadline means you should schedule your inspection appointment before you return to Missouri. Many people get caught off guard by how quickly they need to act after returning to the state.
Fail or Check Engine Light
Failing a vehicle inspection isn’t the end of the world, but you need to understand your options to avoid additional fees. The state provides you with a fair chance to address issues and try again.
Safety Retests and Timelines
If your vehicle fails its safety inspection, you may have a limited period to make repairs and return to the same inspection station for a free retest. This gives you time to shop around for repair quotes and get the work done right.
If you wait more than 20 days or go to a different inspection station, you’ll be charged the full inspection fee again. The 20-day window starts from the date of your failed inspection, not from when you make the repairs.
Emissions Failures and Repairs
An illuminated check engine light automatically fails the emissions test in Missouri. You can’t pass emissions testing with that light on, no matter how clean your exhaust actually runs.
You’ll need to take your vehicle to a mechanic who can diagnose the cause of the check engine light and fix the underlying issue. Only after the light goes off and stays off can you return for a successful emissions retest.
Common Items That Fail
Most inspection failures come from normal wear and tear that many drivers don’t notice in daily driving:
- Brake problems: Worn pads, thin rotors, or brake fluid leaks.
- Light failures: Burned-out headlights, taillights, turn signals, or brake lights.
- Tire issues: Tread depth below 2/32 inch or uneven wear patterns.
- Windshield damage: Cracks or chips that block the driver’s view.
- Safety equipment: Broken horn, damaged mirrors, or non-working seat belts.
Regular maintenance and periodic checks can help you catch these problems before inspection time.
Where to Get a Vehicle Inspection
Finding the right place for your inspection saves time and ensures you get valid certificates that Missouri will accept. Not every auto shop can perform official state inspections.
Missouri Auto Inspection Stations Near You
Only inspection stations licensed by the Missouri State Highway Patrol can perform valid safety inspections. These authorized stations display a large yellow sign with black lettering that’s easy to spot from the road.
You can find nearby stations by searching online for “Missouri auto inspection stations” plus your city name. Many auto repair shops, tire stores, and some gas stations offer inspection services alongside their other automotive work.
St Louis Vehicle Inspection and Emissions
In the St. Louis area, many inspection stations can handle both your safety and emissions tests in one visit. This saves you from making two separate trips and managing two separate appointments.
The Gateway Vehicle Inspection Program website lists all participating emissions testing locations. Calling ahead confirms that a station offers both services and can usually tell you the current wait times.
Costs and Time
Missouri sets maximum fees that inspection stations can charge for safety inspections. Cars and trucks cost up to $12 for a safety inspection, while motorcycles cost up to $10.
Emissions testing in the St. Louis area typically involves a fee. Inspections usually take only a short time, though busy stations may have longer waits during peak periods.
How Inspections Affect Missouri Accident Claims
Keeping your vehicle properly inspected does more than keep you legal. It can also protect your rights if you’re ever hurt in a car accident caused by someone else.
Comparative Fault and Maintenance
Missouri uses pure comparative fault rules in car accident cases. This means if you share any blame for an accident, your compensation gets reduced by your percentage of fault.
If your vehicle had an expired inspection or a known safety defect that contributed to the crash, the other driver’s insurance company will try to shift blame onto you. They’ll argue that your negligence helped cause the accident and try to pay you less money.
Inspection Records as Evidence
Current inspection records prove you’re a responsible vehicle owner who takes safety seriously. We use these records to demonstrate to insurance companies that our clients properly maintained their vehicles and complied with all Missouri laws.
This evidence helps us fight back when insurance companies try to unfairly blame accident victims for crashes they didn’t cause. Having up-to-date inspections strengthens your position and protects your right to full compensation.
Missouri Car Accident Law Firm Assisting Clients Since 1990
If you’ve been hurt in a Missouri car accident, vehicle maintenance issues shouldn’t prevent you from getting the compensation you deserve. Insurance companies often use inspection problems as excuses to deny or reduce valid claims.
At Beck & Beck Missouri Car Accident Lawyers, we represent injured Missourians and fight to protect their rights. Our family-run firm focuses exclusively on Missouri auto accident law and has decades of experience securing compensation for local clients.
We handle every case personally and never treat you like just another number. You’ll work directly with experienced attorneys who understand how insurance companies operate and know how to protect your rights.
Contact us for a free consultation. We’re available 24/7 to help.
Do I Need an Inspection to Get Missouri Tags?
Yes, you must have a current safety inspection certificate to register your vehicle or renew your Missouri license plates, unless your vehicle qualifies for an exemption. The inspection must be completed before you can legally drive with new tags.
What Year Vehicles Are Exempt in Missouri?
Vehicles that are less than 10 model years old and driven fewer than 150,000 miles are exempt from Missouri’s safety inspection requirement. Once your vehicle reaches either milestone, it enters the biennial inspection cycle.
Is Missouri Eliminating Safety Inspections?
No, Missouri has no current plans to eliminate its vehicle safety inspection program. While specific rules and exemptions can change over time, the basic requirement for safety inspections remains in place.
Do Motorcycles Need a Safety Inspection in Missouri?
Yes, motorcycles must follow the same safety inspection rules as cars and trucks in Missouri. They have an initial exemption period, after which they must undergo biennial inspections under Missouri’s even–odd model-year system.
Will a Check Engine Light Fail Emissions?
Yes, if your check engine light is illuminated, your vehicle will automatically fail the emissions test in St. Louis-area counties. You must diagnose and repair the underlying problem before you can pass emissions testing.
How Do Salvage Title Inspections Work in Missouri?
Salvage vehicles need a special inspection by the Missouri State Highway Patrol before they can be titled for road use. This inspection is more thorough than regular safety inspections and ensures the vehicle is safe after being rebuilt from salvage condition.
How Do Inspection Records Affect a Car Accident Claim?
If your vehicle had an expired inspection or a documented safety issue that contributed to an accident, your compensation could be reduced under Missouri’s comparative fault law. Current inspection records help prove you maintained your vehicle responsibly and protect your right to full compensation.
