Ez Smog Check is California's online system for scheduling and paying for smog tests

Ez Smog Check is a website and phone system run by the California Bureau of Automotive Repair that lets you schedule a smog inspection appointment and pay the state inspection fee without visiting a physical office. You book a time slot at a participating test station, pay the $9.25 state fee online or by phone, and then show up for your appointment. The test station performs the actual inspection and reports results directly to the state.

The system exists because California requires smog tests for most vehicles every two years (or annually for vehicles older than 1975). Ez Smog Check handles only the scheduling and fee payment — the actual emissions test happens at a Bureau-certified station in your area, and you pay the station separately for their testing service, which typically costs $30 to $80 depending on your vehicle type and the station's rates.

Key Takeaways

  • Ez Smog Check lets you schedule an inspection appointment and pay the $9.25 state fee online at ezsmogcheck.ca.gov or by calling 1-800-622-7733.
  • You must book your appointment before your current smog certificate expires, and the test station will report your results to the state within one business day.
  • The state fee covers only the inspection itself; the test station charges separately for labor and equipment, which varies by location and vehicle type.
  • If your vehicle fails the test, you have 30 days to repair it and request a retest at the same station, usually at no additional state fee.
  • Not all vehicles need smog tests — newer cars, electric vehicles, and some other categories are exempt, and Ez Smog Check will tell you whether your vehicle requires one.

How to schedule an appointment on Ez Smog Check

Go to ezsmogcheck.ca.gov and enter your vehicle's license plate number. The system will show you whether your vehicle needs a smog test and when your current certificate expires. If a test is required, the site displays available test stations near your zip code, along with their hours and the station's testing fee (not the state fee). Select a station and time slot that works for you.

After choosing your appointment, you'll enter your vehicle's Vehicle Identification Number (VIN) and your contact information. The system then asks you to pay the $9.25 state inspection fee using a credit or debit card. You'll receive a confirmation number and appointment details by email. Bring this confirmation to your appointment along with your vehicle registration and proof of insurance.

If you prefer not to use the website, you can call 1-800-622-7733 to schedule and pay by phone. The process takes about 10 minutes either way. The state fee is non-refundable if you miss your appointment, so make sure you can make the time slot you book.

What happens at your smog test appointment

Arrive at the test station a few minutes early with your confirmation number, registration, and proof of insurance. The technician will perform an emissions test on your vehicle — the type of test depends on your vehicle's year and engine type. For most cars, this involves connecting a probe to your tailpipe to measure exhaust emissions. The test usually takes 15 to 30 minutes.

The test station reports your results to the state within one business day. If you pass, the state issues a smog certificate valid for two years (or one year for older vehicles). You don't need to do anything else — the certificate is electronic and tied to your license plate. If you fail, the station gives you a written report showing which emissions standards your vehicle exceeded. You then have 30 days to repair the vehicle and request a retest, usually at the same station.

What to do if your vehicle fails the smog test

A failed test means your vehicle's emissions exceed California standards for at least one pollutant — typically nitrogen oxides, particulate matter, or hydrocarbons. The test report will specify which standard(s) your vehicle failed. You'll need to have the vehicle repaired by a mechanic before retesting.

Common repairs include replacing a faulty oxygen sensor, fixing a vacuum leak, or addressing a check engine light. Repair costs vary widely — from $100 for a sensor replacement to $500 or more for catalytic converter work. After repairs, contact the same test station to schedule a retest within 30 days. Most stations do not charge an additional state fee for a retest within this window, though some may charge a small station fee. If you don't retest within 30 days, you'll need to pay the full $9.25 state fee again and book a new appointment through Ez Smog Check.

Which vehicles need a smog test and which don't

California requires smog tests for most gasoline and diesel vehicles registered in the state. However, several categories are exempt: all-electric vehicles, vehicles newer than the current model year minus 3 years (so in 2024, vehicles 2021 and newer), vehicles with fewer than 6,000 miles on the odometer, and vehicles that have been registered in California for fewer than 18 months. Vehicles registered as classic cars or street rods may also be exempt depending on their registration type.

When you enter your license plate on Ez Smog Check, the system automatically checks whether your vehicle falls into an exempt category. If it does, the site will tell you no test is required. If you're unsure whether your vehicle needs a test, the Ez Smog Check website or phone line can confirm your vehicle's status before you book an appointment.

Understanding the state fee versus the station fee

The $9.25 state inspection fee goes to California and covers the cost of the state's emissions testing program. This fee is the same at every Bureau-certified station. The test station's fee — what you pay the station directly for performing the test — is separate and varies by location, vehicle type, and station. A basic smog test at one station might cost $35, while a more complex test at another station might cost $75.

When you book on Ez Smog Check, the website shows you the station's fee before you confirm your appointment, so you know the total cost upfront. Some stations offer discounts for online booking or for retests. If you're price-sensitive, compare fees across a few stations in your area before booking. The state fee is always $9.25 and is non-refundable, but station fees may vary by promotion or location.

What to bring to your smog test appointment

Bring your Ez Smog Check confirmation number, your vehicle registration, and proof of insurance. The test station will verify these documents before testing. Your vehicle should be in normal operating condition — the engine should start easily and run without stalling. If your vehicle has a check engine light on, some stations will still test it, but the light itself may cause a failure depending on the diagnostic code.

Make sure your vehicle's fuel tank is at least one-quarter full, as some test procedures require the vehicle to run for several minutes. Arrive with enough time to park and walk into the station; the test itself happens indoors at the station's facility. If you're unsure about any requirement, call the test station directly before your appointment — their phone number will be on your Ez Smog Check confirmation.

Frequently Asked Questions

Can I schedule a smog test if my registration is expired?

You can schedule the test through Ez Smog Check, but most stations will not perform the test if your registration is expired. Renew your registration with the DMV first, then book your smog appointment. Some stations may make exceptions if your registration renewal is pending, so call ahead to ask.

What if I miss my Ez Smog Check appointment?

The $9.25 state fee is non-refundable if you miss your appointment. You'll need to pay the fee again and book a new appointment through Ez Smog Check. To avoid this, only book a time slot you're confident you can make, or cancel at least 24 hours in advance if your plans change.

How long does a smog certificate last?

A smog certificate is valid for two years from the test date for most vehicles. Vehicles older than 1975 receive a one-year certificate. The expiration date appears on your electronic certificate, and Ez Smog Check will remind you when it's time to renew.

Can I get a smog test if my vehicle has a check engine light?

Yes, you can schedule and take the test, but a check engine light often results in a test failure because it indicates an emissions-related fault. Have a mechanic diagnose the issue before testing if possible. If you test anyway and fail, you'll need to repair the problem and retest within 30 days.

What if Ez Smog Check shows no available appointments near me?

Expand your search radius to nearby zip codes, or check back in a few days — stations release new appointment slots regularly. You can also call the station directly to ask about walk-in testing or cancellations. If no certified stations are near you, contact the Bureau of Automotive Repair at 1-800-622-7733 for help locating one.