The STAR program is California's way of letting some vehicles skip the smog test entirely

If your car is registered in California and you see "STAR" printed on your smog test report or renewal notice, it means your vehicle has been certified as a low-emission vehicle and does not need to take a smog test that year. The state uses this program to reduce testing burden on owners of newer, cleaner cars while still monitoring overall air quality. You still renew your registration normally — you just do not have to pay for or schedule a smog test.

The STAR designation is not something you request or explore for. The California Department of Motor Vehicles assigns it automatically based on your vehicle's model year, emissions history, and test results. If your car qualifies, you will see it noted on your registration renewal paperwork or when you check your registration status online.

Key Takeaways

  • STAR means your vehicle is exempt from smog testing for that registration year, but you still must renew your registration.
  • The program applies mainly to newer vehicles and those with a clean emissions history — typically cars from 2000 and newer in good standing.
  • You cannot request STAR status; the DMV assigns it automatically when your vehicle meets the criteria.
  • If your car fails a smog test, you lose STAR status for the next renewal cycle and must test again.

Which vehicles may have access to for STAR status

Generally, vehicles from model year 2000 and newer can receive STAR status if they have passed their previous smog tests and have no outstanding emissions violations. The exact cutoff year changes slightly — the DMV updates it periodically as older vehicles age out of the program. Diesel vehicles, motorcycles, and vehicles registered in their first year are usually excluded.

Your vehicle also loses STAR status if it failed its last smog test, if you have an outstanding "Smog Check Failure" notice, or if you have not completed required repairs after a test failure. Once you pass a new test, you become may be able to access for STAR again at your next renewal.

How to know if your car has STAR status

When you receive your registration renewal notice in the mail, look for the word "STAR" printed on the form. If it appears, you do not need a smog test that year. You can also check your vehicle's status online through the California DMV website by entering your license plate number and vehicle identification number.

If you are unsure whether your vehicle qualifies or if you do not see STAR on your renewal notice, contact your local smog test station or the DMV directly. They can tell you whether your car is exempt and why, if it is not.

What happens if you lose STAR status

If your vehicle fails a smog test at any point, you will lose STAR status. At your next registration renewal, you will be required to test again. You will also need to complete any repairs that the test identified before you can renew your registration.

Losing STAR status does not mean your vehicle is permanently ineligible. Once you pass a smog test, you become may be able to access for STAR again at the following renewal cycle, assuming your vehicle continues to meet the age and emissions standards.

STAR status and registration renewal

Having STAR status simplifies your renewal process — you renew your registration as usual, but you skip the smog test step. You still pay your registration fees and follow the same renewal timeline. The main difference is that you save the cost of a smog test (typically $30 to $50) and the time it takes to schedule and complete one.

If you move to a different state or your vehicle is registered outside California, STAR status does not transfer. Only California-registered vehicles in the STAR program are exempt from testing.

Why California uses the STAR program

The state created STAR to reduce unnecessary testing while still maintaining air quality standards. Newer vehicles with clean emissions histories pose minimal risk to air quality, so testing them every year uses resources that could go toward vehicles more likely to pollute. The program also rewards owners who maintain their vehicles in good condition.

California still monitors overall vehicle emissions through other methods, including roadside testing and data from vehicles that do test. The STAR program does not mean the state has stopped tracking emissions — it means they are focusing testing resources where they are most needed.

Frequently Asked Questions

Can I renew my registration online if I have STAR status?

Yes. STAR status does not change how you renew — you can renew online, by mail, or in person at the DMV, just as you would without STAR. You straightforward do not need to obtain a smog test first.

What if I think my car should have STAR but it does not?

Check your renewal notice for any notes about why STAR was not assigned. Common reasons include a recent test failure, an outstanding repair requirement, or your vehicle being too old. Contact the DMV or your smog test station to review your vehicle's emissions history.

Do I still need to maintain my vehicle if I have STAR status?

Yes. STAR status is based on your vehicle's current condition and history, but it does not exempt you from maintaining it. If your vehicle develops emissions problems, you may fail a test in the future and lose STAR status.

If I move out of California, does STAR matter?

No. STAR is a California program only. If you register your vehicle in another state, you will follow that state's emissions testing rules instead.