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Plain-English answers to every California smog check question
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The Inspection, Step by Step
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Can I get a smog check without DMV notice?
Yes — any vehicle can be smog tested.
Do I need an appointment for smog check?
Walk-ins are welcome at most stations.
Does the shop send results to DMV automatically?
Yes — electronic transmission goes to BAR, then DMV.
How long does a smog check take?
A smog check typically takes 20-30 minutes for a standard vehicle.
How long should I drive my car before smog?
Drive 100-150 miles minimum after a battery disconnect.
My battery died — can I still pass smog?
Likely not — the monitors were reset.
What are OBD readiness monitors?
They are system self-tests for emissions components.
What should I bring to a smog check?
Bring your DMV renewal notice if available.
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