Working Hours
  • Mon 7:30AM - 5:00PM
    Tue 7:30AM - 5:00PM
  • Wed 7:30AM - 5:00PM
    Thu 7:30AM - 5:00PM
  • Fri 7:30AM - 5:00PM
    Sat Closed
  • Sun Closed
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815-399-2886 | 3427 E State St Rockford, IL 61108

Smog Check: Testing and Repairs

Smog Checks in Rockford

*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 TJ's Auto Center Inc in Rockford for Your Smog Testing and Repair

  • Specialized smog check service station in Rockford
  • 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

Rockford's Trusted Source for Smog Testing and Repair

Ask any car or truck owner in Rockford who they recommend for smog testing and repair, and they will tell you TJ's Auto Center Inc.

Since 1984, the pro mechanics at TJ's Auto Center Inc 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 TJ's Auto Center Inc at 815-399-2886 to schedule an appointment today or stop by our location at 3427 E State St in Rockford, IL, 61108.

What Does TJ's Auto Center Inc 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, TJ's Auto Center Inc 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, TJ's Auto Center Inc 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 TJ's Auto Center Inc in Rockford

Undercar Services: Maintenance
Auto Electronics Repair
4X4 Services


What Our Customers Are Saying

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The business always does a great job and takes care of him. They are very polite.

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We brought an older Buick my son drives...it needed a new sensor..we called at 9am; it was towed in and fixed by 3!

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Dependable, caring. We have confidence in the work TJ's does with our family's vehicles.

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Going to Tjs is a real delight. I have been a regular customer since I moved to Rockford 4 years ago. You can't go wrong at Tj's!!

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I always trust the advice and service I receive.

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As always, no complaints on my visit. All my questions were answered in detail.

  • ACDelco
  • ASE (Automotive Service Excellence)
  • Rockford IL
  • Wix
  • Walker
  • Champion
  • Moog
  • Gates
  • Monroe
  • TECH-NET Professional Auto Service - Trans
  • Car Care Aware
  • Call Us For Service: 815-399-2886