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In-Person Smog Repair Events

If you are a San Joaquin Valley resident and you think your vehicle is in need of smog related repairs, bring it to the next scheduled Tune In & Tune Up in your area for a free emissions test.

If your vehicle fails our emissions test, you get a $500 voucher for emission-related repairs at a local STAR-certified smog shop. The $500 can only be used for diagnostics, smog testing, smog repair work, and certification.

Any data that we collect is only used for internal reporting and is not shared with outside agencies.

Have questions?
Please visit our FAQ page for more details.
Also check out our YouTube videos to see what to expect at an event!

Upcoming Tune In & Tune Up Events:

Event Information:

  • Sat
    28
    Mar
    2026

    Free Smog Repair Event — STOCKTON!

    7:45am – 11:45am San Joaquin County Fairgrounds – Gate #3, 1658 S Airport Way, Stockton, CA 95206

    About the Tune In & Tune Up Event:
    Join us at this free community event!
    Our team will perform an on-site emissions test on your vehicle.
    If it fails, you will receive a $500 voucher for emission-related repairs to use at a local STAR-certified smog shop.
    This event is made possible by the Valley Air District.

    Event Location:
    San Joaquin County Fairgrounds – Gate #3
    1658 S Airport Way
    Stockton, CA 95206

    Please Note:
    ⋅ Gates may open as early as 6:30AM.
    ⋅ Gates close at 11:50AM.
    ⋅ No diesel vehicles, please.
    ⋅ Please expect a 2+ hour wait.

    *Please visit our FAQ page for more information.

    EVENT FLYERS