STAR stations are certified smog check locations run by the Bureau of Automotive Repair

A STAR station is a smog check testing location certified by California's Bureau of Automotive Repair (BAR). These stations perform the official emissions test your vehicle needs to pass in order to renew your registration in most California counties. STAR stands for "Smog Check Test and Repair," though not all STAR stations offer repair services — many test only.

STAR stations are privately owned businesses — repair shops, service stations, and independent testing facilities — that have met BAR's training and equipment standards. When you visit a STAR station, you're working with a certified technician who uses state-approved testing equipment. The test itself is the same whether you go to a STAR station or a non-certified station, but STAR stations are the only ones allowed to issue the official smog check certificate that the DMV accepts.

Finding a STAR station near you requires using the official BAR locator tool rather than a general search engine, because Google Maps and similar services do not reliably list all certified locations or keep their information current.

Key Takeaways

  • The official BAR STAR station locator at bar.ca.gov is the most reliable way to find certified testing locations near your address, sorted by distance.
  • STAR stations charge a set fee for smog checks — typically between $30 and $50 depending on your vehicle type — and this price is regulated by the state.
  • You will need your vehicle registration, proof of current insurance, and your vehicle keys to complete a smog check at any STAR station.
  • If your vehicle fails the smog check, you have 30 days to make repairs and return to any STAR station for a retest at no additional fee.

How to locate STAR stations using the official BAR tool

Go to the Bureau of Automotive Repair website at bar.ca.gov and select "Find a STAR Station" from the main menu. You will see a search box where you can enter your city, ZIP code, or county. The tool will display all certified STAR stations in that area, sorted by distance from your location.

Each listing shows the station's name, address, phone number, and hours of operation. Some listings also indicate whether the station performs repairs in addition to testing. You can call ahead to confirm they are open and to ask about wait times, though most STAR stations accept walk-ins during their posted hours.

The BAR locator updates regularly as stations gain or lose certification, so it is more current than third-party directories. If you search and find no results in your when ready area, expand your search radius — many people find a STAR station within 5 to 10 miles of their home.

What documents and information you need to bring

Bring your vehicle registration card (the wallet-sized document from the DMV, not the renewal notice) and proof of current insurance. The technician will verify that your vehicle is registered and insured before testing. You will also need your vehicle keys so the technician can start the engine and operate the vehicle during the test.

If your vehicle has had recent repairs or modifications, bring documentation of that work. Some repairs — such as a new catalytic converter or oxygen sensor replacement — may be relevant to your test results, and the technician may ask about them.

You do not need to make an appointment at most STAR stations, but calling ahead to ask about current wait times can save you a trip during busy hours. Weekend mornings and weekday evenings tend to be busier than weekday afternoons.

Understanding STAR station fees and what they cover

STAR station fees are set by the state and do not vary between locations. As of 2024, the standard smog check fee is $30.25 for most vehicles, though the exact amount depends on your vehicle's model year and type. Diesel vehicles, motorcycles, and vehicles over 30 years old may have different fees. The station will tell you the exact fee before the test begins.

This fee covers the emissions test itself and the official smog check certificate if your vehicle passes. If your vehicle fails, the fee does not cover repairs — those are charged separately by the station if you choose to have them done there. However, if you fail and return within 30 days for a retest after repairs elsewhere, the retest is free at any STAR station.

Some STAR stations charge additional fees for services beyond the basic test, such as pre-inspection consultations or diagnostic work. Ask about these before you agree to any service beyond the standard smog check.

What happens during a STAR station smog check

The test typically takes 15 to 30 minutes. The technician will connect your vehicle to a dynamometer (a machine that measures emissions as your engine runs under load) or perform a static test depending on your vehicle's age and type. You will wait in the station while the test runs.

The technician will provide you with a printed smog check certificate when ready after the test, whether you pass or fail. If you pass, this certificate is valid for 30 days and can be presented to the DMV when you renew your registration. If you fail, the certificate will list the specific emissions standards your vehicle did not meet, which helps you understand what repairs may be needed.

The results are also reported electronically to the state's smog check database, so the DMV will see your test results when you submit your registration renewal.

What to do if your vehicle fails the smog check

A failed smog check does not prevent you from driving your vehicle — it only prevents you from renewing your registration until you pass. You have 30 days from the test date to make repairs and return for a retest. The retest is free if you return to any STAR station within that 30-day window, even if you go to a different station than the first one.

The station that tested your vehicle can provide repair recommendations, but you are not required to have repairs done there. You can take your vehicle to any mechanic, including a dealer or independent shop. Some repair shops specialize in smog-related work and may charge less than a full-service station.

Common repairs for failed smog checks include replacing the oxygen sensor, catalytic converter, or air filter, or addressing issues with the fuel system. The cost varies widely depending on what needs to be fixed. After repairs, return to any STAR station with your vehicle and your original failed certificate to request the retest.

STAR stations versus non-certified smog check locations

California allows both STAR stations and non-STAR stations to perform smog checks, but only STAR stations can issue the official certificate that the DMV accepts for registration renewal. Non-certified stations may offer lower prices, but their test results cannot be submitted to the DMV.

STAR stations are required to meet specific equipment and training standards set by the Bureau of Automotive Repair. This standardization means the test you receive at one STAR station will be consistent with the test at another STAR station. Non-certified stations are not subject to the same oversight, which is why the state only recognizes STAR results.

If you have already had a smog check at a non-STAR station, you will need to have the test repeated at a STAR station before you can renew your registration. The fee for the STAR test is separate and cannot be waived.

Frequently Asked Questions

Can I get a smog check certificate without visiting a station in person?

No. California law requires an in-person emissions test performed by a certified technician using state-approved equipment. Remote or mail-in smog checks are not valid. You must bring your vehicle to a STAR station for the test.

How long is a smog check certificate good for?

A passing smog check certificate is valid for 30 days from the test date. You must submit it to the DMV or use it to renew your registration within that 30-day window. After 30 days, the certificate expires and you will need a new test.

What if I move to a different county after my smog check?

Your smog check certificate remains valid in any California county as long as it is still within the 30-day window. You can renew your registration in your new county using the same certificate. However, if you move to a county that does not require smog checks, you will not need the certificate for that renewal.

Do I need a smog check if my vehicle is brand new?

New vehicles are exempt from smog checks for the first four model years. After that, they are subject to the same smog check requirements as older vehicles. Check your vehicle's registration documents or the DMV website to confirm whether your vehicle requires a smog check for your specific renewal.

What happens if I fail the smog check twice?

You can retest as many times as needed within the 30-day window, and each retest is free. If you cannot pass within 30 days, you will need to wait until the next registration renewal cycle to try again. Some vehicles may need more extensive repairs than others, and a mechanic specializing in emissions issues can help diagnose persistent problems.