Diaz Smog

Smog inspection station
Opens at 8:30 AM
4.7 (95 reviews)
1347 N Mt Vernon Ave, Colton, CA 92324

About

Diaz Smog is a well-known provider of smog check and emissions testing services in Colton, California. They offer thorough vehicle inspections and specialized diagnostics to ensure compliance with state regulations. Customers have consistently praised their quick, friendly, and professional service, making each visit efficient and straightforward. The staff is knowledgeable and helpful in explaining vehicle issues and repair options related to emissions. Their focus on emissions testing and vehicle safety makes them a trusted choice in the community. The shop’s clean environment and attentive service contribute to a positive experience for all customers seeking smog check and emissions repairs.

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Services Offered

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

What Customers Say

Review Summary

Customers appreciate the quick and friendly service at Diaz Smog, with many noting how efficient their visits are. The staff is often described as professional and helpful, offering clear explanations and guidance throughout the process. Some reviews mention that wait times can vary during busy periods, but overall, the experienced team provides reliable testing and friendly customer care. Pricing is viewed as fair given the quality of service and thorough emissions testing conducted. Repeat customers highlight the consistency and honesty of the staff, making Diaz Smog a preferred choice for smog checks in Colton. Minor feedback about service style may vary, but most experiences are positive and recommendable.

Hours Closed
Mon 8:30 am–6 pm
Tue 8:30 am–6 pm
Wed 8:30 am–6 pm
Thu 8:30 am–6 pm
Fri 8:30 am–6 pm
Sat 8:30 am–4 pm
Sun Closed

Frequently Asked Questions

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

Diaz Smog is located at 1347 N Mt Vernon Ave in Colton, California. It is a convenient location for residents seeking emissions tests and vehicle inspections.
The shop offers smog check services, vehicle inspections, OBD-II diagnostics, check engine light diagnosis, and emissions repairs such as catalytic converter replacement and exhaust work.
Yes, Diaz Smog provides emissions testing and smog check services in Colton, California, specializing in helping vehicles meet state compliance and repair emissions issues.
Diaz Smog operates Monday to Saturday from 8:30 am to 6 pm, and on Saturday from 8:30 am to 4 pm. They are closed on Sundays.
You can contact Diaz Smog at plus one 909-514-0905 for appointments, inquiries, or details about their services in Colton, California.
It is recommended to call ahead for an appointment, especially during peak times, to ensure faster service and to reserve your spot for smog check or diagnostics.
Service at Diaz Smog typically takes about 20 to 30 minutes for a smog check, with additional time for diagnostics or repairs if needed.
Customers say Diaz Smog offers fast, friendly, and efficient service with knowledgeable staff. Many appreciate their honesty, quick turnaround, and helpful guidance on emissions issues.

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Making the Most of Your Visit to Diaz Smog

Choosing the right emissions testing or smog check station in Colton, California can save you time, reduce stress, and help ensure your vehicle passes its inspection on the first try. Diaz Smog 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 Colton, confirm what applies to you before heading to Diaz Smog. 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. Diaz Smog currently has 95 reviews, which can provide insights into service quality, wait times, and professionalism.

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

Visit Checklist

  • 1
    Verify Certification

    Ensure Diaz Smog is an active, licensed smog check station in California.

  • 2
    Check Reviews

    Read recent customer feedback from other Colton 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.