California
San Mateo

21ST Avenue Smog Test Only

Smog inspection station
Opens at 10:30 AM
3.9 (53 reviews)
71 21st Ave Suite B, San Mateo, CA 94403
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About

21ST Avenue Smog Test Only is a provider of smog check services in San Mateo, California. They specialize in emissions testing and vehicle inspections to ensure your car meets state standards. As a smog check station, they focus on accurate testing and emissions-related repairs. Their facility is dedicated to helping vehicle owners comply with California regulations. Located on 71 21st Ave Suite B, they serve drivers within the San Mateo area. The business offers diagnostics and repairs for emissions problems such as catalytic converter and oxygen sensor issues, making sure vehicles are road-ready. Their services are essential for vehicle owners needing to pass emissions tests or fix emissions-related problems in San Mateo, California.

smog check vehicle inspection OBD testing San Mateo California emissions testing vehicle emissions

Services Offered

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

What Customers Say

Review Summary

No online reviews exist for this business currently. Services include vehicle emissions checks, smog testing, and related diagnostics. Contact them for service information.

71 21st Ave Suite B, San Mateo, CA 94403 +1 650-350-1922
Hours Closed
Mon 10:30 am–5 pm
Tue 10:30 am–5 pm
Wed • 10:30 am–5 pm
Thu 10:30 am–5 pm
Fri 10:30 am–5 pm
Sat Closed
Sun Closed
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Frequently Asked Questions

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

21ST Avenue Smog Test Only is located at 71 21st Ave Suite B, San Mateo, California. You can visit during their operating hours listed on their website or contact them for exact details.
They offer smog check services, vehicle inspections, OBD-II diagnostics, check engine light diagnosis, and emissions-related repairs such as catalytic converter and oxygen sensor replacement.
Yes, 21ST Avenue Smog Test Only provides emissions testing and smog check services in San Mateo, California, to help vehicles meet state emissions standards.
Their hours are Monday, Tuesday, Wednesday, and Thursday from 10:30 am to 5 pm. They are closed on Sundays and Saturdays.
You can contact 21ST Avenue Smog Test Only by phone at +1 650-350-1922 for questions or to schedule an appointment.
Scheduling an appointment can help reduce wait times. It is recommended to call ahead, especially during peak hours or busy days.
Service typically takes about 30 minutes to an hour depending on the vehicle and service needed. Contact the station for specific time estimates.
Customers rate 21ST Avenue Smog Test Only highly with a 3.9-star average based on 53 reviews. Drivers often mention quick service and professional staff. For the latest feedback, check recent reviews on Google or other review platforms.

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Making the Most of Your Visit to 21ST Avenue Smog Test Only

Choosing the right emissions testing or smog check station in San Mateo, California can save you time, reduce stress, and help ensure your vehicle passes its inspection on the first try. 21ST Avenue Smog Test Only 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 San Mateo, confirm what applies to you before heading to 21ST Avenue Smog Test Only. 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. 21ST Avenue Smog Test Only currently has 53 reviews, which can provide insights into service quality, wait times, and professionalism.

"Clear communication and preparation make your smog check easier. Ask 21ST Avenue Smog Test Only about wait times, retest policies, or emissions repair services if you have concerns."

Visit Checklist

  • 1
    Verify Certification

    Ensure 21ST Avenue Smog Test Only is an active, licensed smog check station in California.

  • 2
    Check Reviews

    Read recent customer feedback from other San Mateo 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.