How Long is a Smog Certificate Good For in California?

A California smog certificate is good for 90 days from the day of your test.

What that means for you

• Renewing registration? Renew within 90 days of your smog check.
• Selling a car? The sale needs to go through within 90 days of the test.
• Bringing a car from out of state? Register it within 90 days.

What if it expires?

There’s no grace period. If 90 days pass, you’ll need a new smog check. So don’t test too early.

Do I get a paper certificate?

Your results go straight to the DMV electronically, so there’s nothing to mail. We’ll give you a printed report for your records.

Recently had repairs?

If your check engine light was just cleared or your battery was replaced, drive normally for a few days before testing. That gives your car’s computer time to finish its self-checks.

What we test

Gas and hybrid cars 2000 and newer, diesel cars and pickups 1998 and newer, and RVs under 12,000 lbs. We’re a non-STAR, test-only station.