Missouri Vehicle Safety Inspection: Requirements, Fees, and Penalties

A Missouri vehicle safety inspection is a biennial check run through the Missouri State Highway Patrol’s Motor Vehicle Inspection program, required for most registered vehicles unless yours is within ten years of its model year and has fewer than 150,000 miles on the odometer. The fee is capped at $12 for a passenger car, the certificate is good for 60 days when you apply for registration, and the check covers 15 categories of components from brakes to window tint.

Whether Your Vehicle Needs One

The exemption that covers most newer cars has two conditions, and both have to be true at once. Your vehicle is exempt during the ten-year period following its model year of manufacture, and it must also have fewer than 150,000 miles on the odometer.¹ Miss either one and you need an inspection. A 2018 model with 160,000 miles needs one even though it’s inside the ten-year window; a 2014 with 80,000 miles needs one because the window has closed.

Several categories skip the program entirely:

Vehicles displaying official historic license plates.
Boat trailers, cargo trailers, and travel trailers.
Dealer-to-dealer transfers between licensed dealers.

Salvage or rebuilt vehicles work the opposite way. They must pass a safety inspection immediately after being rebuilt, no matter their age or mileage, and the newer-vehicle exemption doesn’t reach them.¹

When Your Inspection Is Due

Missouri stages inspections across two-year cycles. Even-numbered model years get inspected in even-numbered calendar years, and odd-numbered model years in odd-numbered calendar years.¹ A 2016 model is due in 2026, 2028, and so on. A 2017 model is due in 2027 and 2029.

Timing within the year matters too. The inspection cannot happen more than 60 days before you apply for registration, so an early trip to the shop just means the certificate expires unused. One narrow exception helps buyers: if a dealer had a valid inspection done within 60 days of selling you the vehicle, you can use that certificate for up to 90 days from the inspection date when you register or transfer it.¹

What the Inspector Checks

The Highway Patrol’s Motor Vehicle Inspection Regulations Manual lists 15 categories a certified technician has to evaluate.² The check is visual and mechanical; there’s no engine diagnostic scan and no road test.

Brakes, including stopping power, pedal reserve, master cylinder, pads, drums, discs, hoses, lines, and the parking brake. Air brake systems get pressure and leakage checks.
Headlights, taillights, turn signals, and brake lights, along with the high-beam indicator.
Steering and suspension components: wheel free play, power steering fluid, wheel bearings, tie rod ends, ball joints, springs, shocks, and stabilizer bars.
Tires and wheels. Tread depth must be at least 2/32 of an inch, with no bulges, cuts, or separations, and no mismatched types.
Exhaust system, examined for leaks and secure attachment.
Glass and windshield. Cracks in the driver’s vision area can fail the vehicle, and the driver’s side window must open and close.
Windshield wipers, horn, and mirrors.
Fuel system, including tank, lines, filler tube, and gas cap.
Seat belt assemblies.
Air pollution control devices: PCV valve, catalytic converter, EGR system, evaporative emissions system, and oxygen sensors.

Window Tint

Tint fails more people than worn brakes do. Missouri prohibits aftermarket tint on the windshield except for the strip along the top that manufacturers normally tint at the factory.³ The front side windows immediately to the driver’s left and right must let at least 35% of light through, with a 3% tolerance, and reflectance on those windows can’t exceed 35%. Rear side windows and the back windshield have no specific tint restriction under state law. Front windows that fail need the film removed or replaced before re-inspection.

Fees and What to Bring

Stations set their own prices, but state law caps the fee at $12 for a standard passenger vehicle and $10 for a motorcycle.⁴ Most charge the maximum.

Bring proof of ownership, meaning your title or most recent registration receipt, so the technician can verify the VIN and enter the correct data into the state system. Only authorized stations can issue a valid certificate, and you’ll recognize them by the official yellow inspection sign posted on the building.⁵

If Your Vehicle Fails

A failed vehicle gets a written rejection listing every component that didn’t pass. You then have 20 consecutive days, excluding Saturdays, Sundays, and holidays, to make repairs and return for a free re-inspection.⁴ Roughly four calendar weeks, depending on which holidays fall inside the window.

The free re-inspection only applies if you return to the same station that did the original check, and the technician verifies just the listed defects. Go somewhere else, or return after 20 days, and you pay the full fee again and the whole vehicle gets evaluated from scratch. Any repair shop can do the actual fix.

Using the Certificate to Register

A passing certificate is valid for 60 days from the date it was issued, and you must submit it to the Department of Revenue within that window when you apply for registration.⁶ Get inspected on January 15 and the certificate expires March 16. Miss the window and you need a fresh inspection.

You can renew online, where stations often transmit the inspection result electronically, or in person at a local Department of Revenue license office. Either way, you’ll also need proof of insurance and personal property tax receipts for the county where the vehicle is assessed.

Emissions Testing Is Separate

The safety inspection and the emissions test are two different requirements. The Gateway Vehicle Inspection Program requires vehicles registered in the city of St. Louis and in Jefferson, St. Charles, and St. Louis counties to pass an emissions test on top of the safety inspection.⁷ If you live outside those areas, the safety inspection is all you need.

The emissions test checks the onboard diagnostic system and tailpipe output at an authorized emissions station. Some stations handle both checks; plan for two appointments if yours doesn’t.

Penalties for Driving Without One

Operating a vehicle without a current inspection certificate when one is required is a misdemeanor under Missouri law.⁸ A conviction goes on your criminal record. The Highway Patrol has motor vehicle inspectors with authority to issue citations for inspection violations specifically, separate from regular patrol officers. You also can’t register or renew your plates without a valid certificate, so letting the inspection slide can pile an unregistered-vehicle charge on top of the misdemeanor.

If You’re Out of State When It Comes Due

Missouri lets you register your vehicle with the Department of Revenue without the inspection if you’re temporarily living in another state when it’s due. You then have to get the vehicle inspected within ten days of returning to Missouri, with the clock starting the moment you’re back.⁹

1
Missouri Revisor of Statutes. Missouri Revised Statutes 307.350 – Motor Vehicles, Biennial Inspection Required, Exceptions
2
Missouri State Highway Patrol. Missouri Vehicle Safety Inspection Regulations Manual
3
Missouri Revisor of Statutes. Missouri Code 307.173 – Tinted Windows
4
Missouri Revisor of Statutes. Missouri Revised Statutes 307.365 – Inspection Station Permit Not Transferable
5
Missouri State Highway Patrol. Motor Vehicle Inspection
6
Missouri Revisor of Statutes. Motor Vehicle Registration Renewal
7
Gateway Vehicle Inspection Program. Gateway Vehicle Inspection Program
8
Missouri Revisor of Statutes. Missouri Code 307.390 – Penalty for Violation
9
Missouri State Highway Patrol. Motor Vehicle Inspection FAQs