Failed a Smog Check

What Happens If You Fail a Smog Check in California?

A failed smog check delays your registration, but it doesn't mean starting over. Here's exactly what happens next.

Right after a failed test

We'll walk you through exactly what needs attention and point you toward next steps so you know what to fix before coming back for a retest. You'll leave with a clear picture of what failed and why, not just a pass/fail slip.

Your registration and the failed test

DMV won't renew your registration on a failed smog certificate. You'll need a passing result before the renewal can go through, so it's worth getting repairs scheduled promptly if you're close to your registration deadline.

Getting repairs done

We can point you toward what needs attention, but repairs themselves are handled by a mechanic. Once repairs are complete, you're ready for a retest.

The retest

Car wouldn't pass the first time? No worries. We provide a free retest within 30 days for 1996 and newer vehicles. If your vehicle was flagged as a gross polluter specifically, see our gross polluter retest guide — that category has its own testing requirements.

If you're outside the retest window

Outside the free-retest period, a new full smog check applies. That's another reason to move on repairs promptly after a failed test rather than letting the window lapse.