California
Concord

Clayton-Treat Automotive

Smog inspection station
Opens at 9:00 AM
4.4 (93 reviews)
4300 Clayton Rd, Concord, CA 94521
Call Now Visit Website

About

Clayton-Treat Automotive is a provider of emissions testing and smog check services in Concord, California. They offer thorough smog check tests for various vehicle types. Customers appreciate their fast and professional service, often highlighting the ease of process and friendly staff. The shop is known for its reliable testing experience and helpful approach in assisting customers with emissions-related concerns. Located conveniently, they serve residents needing regular vehicle inspections or emissions repairs. Their focus is on ensuring vehicles meet emission standards efficiently while delivering good customer service.

smog check vehicle inspection OBD testing Concord California emissions testing vehicle diagnostics

Services Offered

smog check
Vehicle Inspection
OBD-II Diagnostics
Check Engine Light Diagnosis
Emissions-related repairs

What Customers Say

Review Summary

Customers generally find Clayton-Treat Automotive helpful and efficient for their emissions testing needs. Many mention the quick service and professional staff, though some note that wait times can vary during busy hours. Pricing is viewed as fair, and repeat customers appreciate their honesty and thorough diagnostics. Despite minor differences in service style, most reviews reflect a positive experience with the smog check process and staff helpfulness. Overall, reviews suggest trustworthiness and consistent performance for vehicle emissions testing in Concord.

4300 Clayton Rd, Concord, CA 94521 +1 925-682-4300 Visit Website
Hours Closed
Mon 9 am–5 pm
Tue 9 am–5 pm
Wed • 9 am–5 pm
Thu 9 am–4:30 pm
Fri 9 am–5 pm
Sat 9 am–5 pm
Sun Closed
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Frequently Asked Questions

Discover quick and comprehensive answers to common questions about our platform, listings, and services.

Clayton-Treat Automotive is located at 4300 Clayton Rd, Concord, California. They are easily accessible for residents and nearby vehicle owners.
They provide smog check, vehicle inspection, OBD-II diagnostics, check engine light diagnosis, and emissions-related repairs in Concord, California.
Yes, Clayton-Treat Automotive offers emissions testing and smog checks as part of their services in Concord, California to ensure your vehicle meets state standards.
Their hours are Monday through Saturday from 9 am to 5 pm, with Thursday closing at 4:30 pm. They are closed on Sundays.
You can contact Clayton-Treat Automotive by phone at +1 925-682-4300 or visit their website at www.claytontreatauto.com for more information.
No appointment is necessary for many of their services, though during peak times you might experience wait times. Walk-ins are welcome.
Service times vary but typically smog checks and diagnostics are completed within 30 minutes to an hour, depending on the vehicle's condition.
Customers generally describe Clayton-Treat Automotive as friendly and professional, noting their honesty and efficiency during testing and repairs.

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Making the Most of Your Visit to Clayton-Treat Automotive

Choosing the right emissions testing or smog check station in Concord, California can save you time, reduce stress, and help ensure your vehicle passes its inspection on the first try. Clayton-Treat Automotive is one of the licensed smog check locations in the area, and preparing properly before your visit can make the process smoother.

Understanding California Smog Check Requirements

Emissions testing and smog check rules in California vary by vehicle type, registration ZIP code, and model year. Since requirements can differ even within Concord, confirm what applies to you before heading to Clayton-Treat Automotive. Our California emissions testing guide outlines current 2025 rules, exemptions, and testing intervals.

Before Your Smog Check

To help make your emissions test quick and successful, consider preparing the following:

  • Confirm your registration address requires testing.
  • Ensure your check engine light is off and no recent codes have been cleared.
  • Warm up your vehicle by driving 10 to 15 minutes before testing.
  • Bring your registration or renewal notice and a valid photo ID.

Why Reviews Matter

Customer experiences can vary, so reading feedback from other drivers can help you understand what to expect. Clayton-Treat Automotive currently has 93 reviews, which can provide insights into service quality, wait times, and professionalism.

"Clear communication and preparation make your smog check easier. Ask Clayton-Treat Automotive about wait times, retest policies, or emissions repair services if you have concerns."

Visit Checklist

  • 1
    Verify Certification

    Ensure Clayton-Treat Automotive is an active, licensed smog check station in California.

  • 2
    Check Reviews

    Read recent customer feedback from other Concord drivers to understand typical wait times and service quality.

  • 3
    Confirm Services

    Call ahead to confirm the types of smog checks and emissions tests offered and whether appointments are required.

  • 4
    Bring Required Documents

    Have your registration or renewal notice, ID, and any required paperwork ready when visiting the station.

  • 5
    Ask About Retest Policies

    Some stations offer discounted or free retests if your vehicle fails. Ask for details up front.

* This guide is for informational purposes only. Always confirm emissions testing requirements and smog check policies with your local California authorities.