Top Rated Smog Test Shops Serving Pleasant Hill, CA

If you really care about choosing a quality smog test shop, we’re here for you. Here’s your access to the best smog test shops serving Pleasant Hill including 94523. These smog test experts provide obd-ii (on-board diagnostics) system and catalytic converters, and they also work on compliance certificates, emission testing equipment and smog tests. For 22 years we’ve conducted the most accurate ratings and deepest research of local shops, so you’ll be confident in choosing.

  • Last Updated Mar 04, 2026
  • 8,530 people sourced companies in Auto Smog
    1,449 Verified Auto Smog Customers Surveyed
1,449
8,530
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Delta Transmission

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Delta Transmission has been servicing, repairing, replacing and rebuilding transmissions at its Antioch facility since 1958. In addition to general tr...
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Main Services

Auto Repair
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Auto Transmissions
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Additional Services

Transmission Rebuilds, Differentials & Transfer Cases, Brake Pads & Rotors, Free Diagnoses on Transmissions & Differentials, No Engine Repairs, Drive Shaft Balancing, Shortening & Lengthening, U-Joint Replacement

Coverage Areas

Contra Costa County

Family Owned
Family Owned
Established in 1958
Established in 1958
Free Quotes & Consultations
Free Quotes & Consultations
Free Estimates
Free Estimates
Diamond Certified Video Profile
Auto Repair - Delta Transmission - Contra Costa County
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Chester Kniss, Owner-Delta Transmission
Chester Kniss, Owner
Expert Contributions
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  • 465
  • Rating Surveys
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  • 13
  • Photos
    & Videos
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  • 5
  • Researched Articles
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    1105 Sunset Drive, Antioch, CA 94509
    Hours CLOSED NOW
    License:
    247427
    2 of 3

    Dublin Car Tek

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    Dublin Car Tek is a Dublin-based general repair shop that works on foreign and domestic vehicles for Alameda and Contra Costa County motorists. The co...
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    Main Services

    Auto Repair
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    Additional Services

    Air Conditioning, Brakes, STAR Smog Checks & Repairs, Transmissions, Tune-ups, Heavy-Duty Fleet Services, Tires, Batteries, Radiators, Factory-Recommended Service, Suspension Work, “Check Engine” Light Diagnosis

    Brands

    ACDelco, BMW, Chevron, Mercedes-Benz, Mobil 1, Motorcraft, Valvoline

    Coverage Areas

    Contra Costa County, Alameda County

    Family Owned
    Family Owned
    Established in 1991
    Established in 1991
    Special Discount
    Special Discount
    Residential & Commercial
    Residential & Commercial
    Diamond Certified Video Profile
    Auto Repair - Dublin Car Tek - Contra Costa County
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    Tim Johnson, Owner-Dublin Car Tek
    Tim Johnson, Owner
    Expert Contributions
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    • 611
    • Rating Surveys
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    • 12
    • Photos
      & Videos
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    • 5
    • Researched Articles
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      6008 Dougherty Road, Dublin, CA 94568
      Hours CLOSED NOW
      License:
      177039
      3 of 3

      Letcher Brothers Auto Repair

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      Letcher Brothers Auto Repair services most types of European, Japanese, American and fleet vehicles at its Pinole facility, handling everything from g...
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      Main Services

      Auto Repair
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      Auto Tires, Wheels & Alignment
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      Auto Transmissions
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      Auto Muffler & Brakes
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      Auto Diagnostics
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      Auto Repair - Electrical
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      Additional Services

      Automotive Repair & Maintenance, “Check Engine” Lights, Electrical Work, Air Bags, Transmissions, Suspensions, Anti-Lock Braking Systems (ABS), Alignments, Computer Diagnostics, Tires

      Coverage Areas

      Contra Costa County

      Family Owned
      Family Owned
      Established in 1991
      Established in 1991
      Free Estimates
      Free Estimates
      Appointments Available
      Appointments Available
      Diamond Certified Video Profile
      Auto Repair - Letcher Brothers Auto Repair - Contra Costa County
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      Diamond Certified Company Report
      Mike Letcher, Owner-Letcher Brothers Auto Repair
      Mike Letcher, Owner
      Expert Contributions
      ratings icon
      • 302
      • Rating Surveys
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      • 15
      • Photos
        & Videos
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      • 5
      • Researched Articles
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        636 San Pablo Avenue, Pinole, CA 94564
        Hours CLOSED NOW
        License:
        179974
        Learn how to choose a Auto Smog and more…

        Diamond Certified Smog Test Shops Serve These Pleasant Hill ZIP Codes

        94523

        Diamond Certified Smog Test Shops In Pleasant Hill

        Diamond Certified smog test shops serving Pleasant Hill are rated an average of 4.6 out of 5 stars based on 1654 reviews of 17 rated smog test shops.
        Diamond Certified smog test shops in Pleasant Hill Avg. Star Rating.

          Map of Pleasant Hill, CA

          Pleasant Hill was founded in 1860, and today, your 33,152 neighbors enjoy mud baths, bistro hopping, outdoor sports, paragliding and galleries. Pleasant Hillians use Diamond Certified smog test shops for emission testing equipment, emissions testing, air pollution control, smog check requirements, tailpipe emissions, and more.

          Frequently Asked Questions for Auto Smog in Pleasant Hill, CA
          Q: What are customers of Diamond Certified smog test shops saying about shops in Pleasant Hill, CA?
          A: Verified Delta Transmission Customer, 1 of 465
          "I would most definitely recommend them. They did a great job with me and it was affordable compared with other people. I was very happy with the service. Basically, they got it done." - Conrad P.
          All Survey Responses for Delta Transmission
          Verified Dublin Car Tek Customer, 1 of 611
          "I liked that their mechanics are honest, they don't ever do work that isn't necessary, and they're really good about giving me information when I go in and have my car serviced. Their customer service, especially as a woman going in, because women are taken advantage of a lot and I don't feel that that occurs when I'm there. They're very conscientious. " - Cheryl J.
          All Survey Responses for Dublin Car Tek
          Verified Letcher Brothers Auto Repair Customer, 1 of 302
          "They are pretty straightforward, the prices are reasonable, and they do excellent work. The confidence I have in Letcher Brothers Auto Repair, I love the work that they do and the price. Mike knows both European and American cars." - Brendon D.
          All Survey Responses for Letcher Brothers Auto Repair
          Q: What are some of the most popular brands that Diamond Certified smog test shops use when working with Pleasant Hill residents?
          A: Diamond Certified smog test shops use top-quality brands like Banks Power, Corsa, Dynomax, Hooker Headers and AFE Power.
          Q: What types of compliance certificates do smog test shops offer?
          A: Smog test shops offer two types of smog tests: the traditional two-speed idle test and the newer dynamometer test. The two-speed idle test measures the amount of pollutants released from the vehicle’s tailpipe while the engine is idling at two different speeds. The dynamometer test measures the amount of pollutants released from the vehicle’s tailpipe while the engine is revved up to higher speeds on a treadmill-like device. Both tests measure the amount of pollutants produced by the vehicle and both are required for a smog check.
          Q: Can Diamond Certified smog test shops work with MagnaFlow products and similar items so I can get obd-ii (on-board diagnostics) system in Pleasant Hill?
          A: Yes, Diamond Certified smog test shops in Pleasant Hill can work with MagnaFlow products and similar items to get an OBD-II system.
          Q: What did people search for when they wanted to find the best quality smog test shops in Pleasant Hill?
          A: Vehicle Emissions Standards
          Clean Air Regulations
          Emissions Testing
          Smog Inspection Station
          Emission Control Devices

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