Every California smog check term and question, plainly defined

How long should I drive my car before smog?

Drive 100-150 miles minimum after a battery disconnect.

Per BAR Smog Check Program standards.

This entry also has a full Q&A treatment: smoganswers.com/q/how-long-should-i-drive-my-car-before-smog/

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Last reviewed 2026-05-25 · Cal Smog Network canonical answer library