Working Hours
  • Mon 8:00AM - 5:00PM
    Tue 8:00AM - 5:00PM
  • Wed 8:00AM - 5:00PM
    Thu 8:00AM - 5:00PM
  • Fri 8:00AM - 5:00PM
    Sat Closed
  • Sun Closed
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636-441-8121 | 4600 Central School Rd Saint Charles, MO 63304

Smog Check: Testing and Repairs

Smog Checks in Saint Charles

*Please bring your DMV renewal notice indicating a Smog Check is required with you and your Smog Check certificate will be electronically sent to the DMV.

Why Choose Kar Tech in Saint Charles for Your Smog Testing and Repair

  • Specialized smog check service station in Saint Charles
  • Smog test and repair options to minimize cost and maximize convenience
  • Smog failure diagnosis with onsite repair and smog retesting
  • State-of-the-art automotive smog repair systems and tools
  • We participate in the California State Free Smog Testing Program
  • Ask about smog repair discounts and coupons

Saint Charles's Trusted Source for Smog Testing and Repair

Ask any car or truck owner in Saint Charles who they recommend for smog testing and repair, and they will tell you Kar Tech.

Since 1990, the pro mechanics at Kar Tech have provided quick smog testing and cost-effective smog repairs when needed. Start a maintenance service plan with us that can help prevent high-cost repairs to your emission system. We are professional, honest, and friendly. For five star, cost conscious smog testing and repair services call Kar Tech at 636-441-8121 to schedule an appointment today or stop by our location at 4600 Central School Rd in Saint Charles, MO, 63304.

What Does Kar Tech Do During a Smog Check?

We inspect your car or truck's emissions-control equipment to measure the number of pollutants your vehicle is emitting.

First, Kar Tech will analyze your car or truck's OBD computer system, emissions-control system, and check engine light codes for standard warnings that your emissions system is no longer functioning properly.

Next, we will inspect your car or truck's gas cap, ignition timing, exhaust gas recirculation system, fuel, and evaporative system.

Finally, we will perform a Tailpipe Emissions Inspection which measures the type and quantity of any pollutant emitted from your vehicle's tailpipe.

Did You Pass Your Smog Test?

Great! If your vehicle passes a smog check, Kar Tech will provide you a vehicle inspection report showing your vehicle's results and will electronically send the smog certificate to DMV.

Discover More About Exhaust Repair Services At Kar Tech in Saint Charles

Undercar Services: Maintenance
Auto Electronics Repair
Inspections & Emissions


What Our Customers Are Saying

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Always good work and fair prices. I have a Tahoe that I purchased new that now has 340,000 miles, and a bunch of Jeeps with 240,000 miles apiece, I credit Kar Tech for giving me the ability to keep my autos on the road so long.

, 05/19/2020

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Knowledgeable, Efficient, and Honest! Kar Tech diagnosed the problem, called me with an estimate, and completed the repair - at a very reasonable price!! I highly recommend this place!

, 05/19/2020

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Great people who have gone above and beyond to get my truck on the road. Honest and very fair. I couldn't ask for anything to have gone better.

, 05/19/2020

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I have used Kar Tech for the last 10 years with 3 different vehicles. I feel so safe and comfortable taking my car to them. I get honest feedback. The prices are great and the service is awesome. They always get me in quick and are great at explaining everything to me. I appreciate having them as my go-to more than they know. Thank you!

, 05/19/2020

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Nice family owned business who knows what their doing!

, 05/19/2020

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Friendly service and great prices. This has been my only mechanic for 15 years at least and will only go to them!

, 05/19/2020
  • ASE Master Technician
  • NAPA AutoCare Center
  • IDENTIFIX
  • Jasper
  • MITCHELL 1
  • Draeger
  • Motorcraft
  • Car Care Aware
  • Call Us For Service: 636-441-8121