Skip the auto shop - Our mechanics make house calls

How to Become a Certified Mobile Vehicle Inspector (State Car Inspector Certified) in Missouri

How to Become a Certified Mobile Vehicle Inspector

The state of Missouri requires all motor vehicles to pass a vehicle safety inspection, except in a few specific exemptions. Inspection certifications are awarded by the state, and can offer those seeking an automotive technician job an excellent way to build their resume.

Missouri motor vehicle inspection licensing

There are two types of state vehicle inspection licenses in Missouri: a permit to inspect only motorcycles, and a permit to inspect only motor vehicles. In order to inspect both vehicles and motorcycles, a mechanic must meet the qualifications listed below, and pass two separate examinations – one for each license.

In order to qualify as an inspector/mechanic within the state of Missouri, an automotive service technician must have at least one of the following:

  • One year of practical experience in an auto technician job

  • A degree or certificate of completion from an auto mechanic school or vocational program

Inspector/mechanics must be at least 17 years old, and must pass a written exam that covers all the contents of the inspection manuall. In order to pass the exam, the student must score at least an 80%.

There is no charge to receive an inspector’s permit, and permits are valid for a three-year period. If the inspector’s permit expires, the mechanic must retake the exam to qualify for a new permit. Additionally, state law allows the State Patrol to retest an inspector at any time, for any reason; if the inspector does not pass the exam during a random retesting, their permit will be suspended for at least 30 days. They must then attempt to pass the exam again, and may not perform inspections until they do.

Exams are given in various locations on Tuesdays, Wednesdays, and Thursdays.

To be scheduled for an exam, a mechanic must submit an official Inspector/Mechanic Application to the Missouri State Highway Patrol.

Missouri vehicle inspection requirements

The following exemptions are the only scenarios in which a vehicle does not have to be safety inspected in the state of Missouri:

  • During the first five years from the date the vehicle’s manufacturing. This exemption does not apply to emissions testing.

  • Vehicles registered for more than 26,000 pounds, and for a period of less than 12 months, such as a quarterly registered vehicle.

  • Vehicles engaged in interstate commerce and registered with the Missouri Department of Transportation.

  • Vehicles that have historic plates.

  • Vehicles with salvage titles.

  • Vehicles sold from one dealer to another dealer.

Safety inspections are also accompanied by emissions tests in St. Louis County, St. Louis City, St. Charles County, Franklin County, and Jefferson County. There are many exemptions for emissions tests that can be found at the Department of Revenue’s website. Finally, all commercial vehicles must be inspected according to both Missouri state law, and the FCSMA regulations.

Annual vehicle inspection report for commercial vehicles in Missouri

The following systems or vehicle components must be inspected to declare a commercial vehicle safe, according to the FMCSA’s Annual Vehicle Inspection Report, used by all Missouri automotive tech jobs:

  • Wheels and Rims
  • Brake System
  • Exhaust System
  • Safe Loading
  • Suspension
  • Windshields
  • Fuel System
  • Lighting Devices
  • Coupling Devices
  • Wipers
  • Frame
  • Tires

If you’re already a certified mechanic and you’re interested in working with YourMechanic, submit an online application for an opportunity to become a mobile mechanic.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.


Post a question and get free advice from our certified mechanics.


More related articles

P3427 OBD-II Trouble Code: Cylinder 4 Deactivation/Intake Valve Control Circuit Low
What the P3427 code means When starting, and when the vehicle is operating under heavy weight, the engine will operate in V8 mode. But when driving conditions are light, the engine...
P0608 OBD-II Trouble Code: Control Module VSS Output "A" Malfunction
P0608 means there is an malfunction in the vehicle speed sensor A control module often due too faulty speed sensor or shorted electrical wiring.
P0684 OBD-II Trouble Code: Glow Plug Control Module to PCM Communication Circuit Range/Performance
P0684 code means there is a failing connection within the Glow Plug Control Module often due too corroded wires and solenoid failures.

Related questions

Q: Advice on how to become a mechanic

I learned from my grandfather who was a mechanic. I started when I was 14, but he wouldn't teach me anything, he'd only let me watch. Over time I practiced and figured things out myself. Today, you can learn a...

Q: Advice on working as a mechanic

I'm kind of unique because I learned from my grandfather, who was a mechanic at the corner of Texaco gas station in New York when I was a kid. So I learned hands-on from my grandfather. He wouldn't teach me...

Q: Mechanic as a career?

If you're interested in cars, you might want to train to become a mechanic. The guys at YourMechanic were telling me that, for qualified mechanics, pay rates start at $40 an hour. Of course, you are not a qualified mechanic...