Missouri Safety and Emissions Inspections in 2024

Effective August 28, 2019, requirements for Missouri safety and emissions inspections have changed. Prior to August 28, 2019, with several exceptions, Missouri law required that cars and light trucks registered in Missouri undergo bi-annual safety and emissions inspections. Even year vehicles were inspected in even years, and odd year vehicles were inspected in odd years This has changed. Now, with a few exceptions, Missouri safety inspections are not required until a vehicle is more than 10 years old, or the vehicle’s odometer has exceeded 150,000 miles.

Safety Inspections in Missouri

What the inspection covers:

The safety inspection insures that vehicles on Missouri roads meet a minimum standard of safety. Items checked include lighting, mirrors, glass, brakes, windshield wipers, suspension, and steering components.

How much the inspection costs:

The state mandated maximum fee for a safety inspection is $12. If a vehicle fails an inspection and the owner elects to correct the failed item, he or she may perform the repairs themselves or have the repairs performed by an individual or shop. Regardless of where the vehicle is repaired, the owner has 20 working days to submit the vehicle for a free re-inspection. After 20 working days, the owner may be required to pay for another inspection. On a re-inspection, only items that failed the initial inspection may be re-check by an inspector/mechanic.

10-Year Safety Inspection Requirement

If a vehicle is less than 10 years old, a Missouri safety inspection is generally not required for a license renewal. (For example, a 2010 model year vehicle will not require a safety inspection until 2022.) Once a vehicle has surpassed 150,000 miles, a safety inspection will be required every tow years, regardless of model year.

The transfer of a vehicle’s title also triggers the requirement for a safety inspection.

Emissions Inspection

St. Louis area emissions requirements:

Cars and light trucks that are registered in the City of St. Louis, St. Louis County, St. Charles County, and Franklin County that are from the 1996 model year, or newer, are also required to undergo a bi-annual emissions inspection for which the maximum fee is $24.

What the emissions test covers:

The emissions test in Missouri consists of a test of a vehicle’s OBDII emissions system. 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. The part about having monitors run is very important; if the monitors have not run because the battery has recently been disconnected or if stored codes have been cleared, the vehicle will not pass the emissions inspection.

What to do after a failed emissions test in Missouri:

The owner of a vehicle that has failed an emissions inspection may repair the vehicle him or herself or have it repaired by a repair shop or individual. Also, the motorist has 20 working days to get a free emissions re-inspection. The transfer of a title also triggers the requirement for an emissions inspection.

MO License Plates Requirements

The easiest way to renew License Plates is to take your required inspections, along with proof of insurance and two years worth of personal property tax receipts to a Missouri fee office. For more information about Missouri safety and emissions inspections, please either give us a call at 314-800-8619 or check out one of the links that we have provided. Thanks again.