FAQ Updated 2026-10-30
California Smog Check FAQ
A California smog check costs about $67 on average plus an $8.25 certificate fee, takes about 30 minutes and is good for 90 days.
Finding a Smog Check Station
Where can I get a smog check near me?
Go to any station licensed by the Bureau of Automotive Repair (BAR) to do Smog Checks. Use our station finder to see licensed stations close to you. Pick a test only, test and repair or STAR station based on what your car needs.
Where can I get a smog inspection?
You can get one at any BAR licensed Smog Check station. BAR also runs an Auto Shop Locator on bar.ca.gov. Call ahead to make sure the station can test your type of car.
Where can I get my car emissions tested in California?
Emissions testing in California is done through the Smog Check program at BAR licensed stations. Search our county lists or the near me finder for a station. Bring your DMV renewal notice if you have it.
Do Jiffy Lube, Valvoline, Costco or Walmart do smog checks?
It depends on the individual location. Only a shop with a BAR Smog Check station license can inspect your car, and many stores and chains do not have one. Search the station finder or call the location and ask if it is licensed for Smog Check.
Do AAA, Firestone, Midas or Les Schwab do smog checks?
Some locations might, but a brand name does not tell you. Each station needs its own BAR license to do a Smog Check. Call first and ask if they are licensed and if they can test your car.
What is a smog station?
A smog station is a shop licensed by BAR to do Smog Check inspections. There are test only, test and repair, repair only and STAR types. BAR counted 6,811 licensed smog stations of all types in September 2026.
How can I tell if a smog station is legit?
Check that the station holds a current BAR license on BAR's license lookup. Make sure it gives you a written estimate before it starts. If anything feels wrong, read our page on illegal smog check stations.
Should I pick a test only or a test and repair station?
Either one can give you a certificate if your car passes. A test only station cannot do emissions repairs, so you would go elsewhere if you fail. A test and repair station can test and fix, which saves a trip.
Do I need an appointment for a smog check?
Each station sets its own policy, so call ahead. Some take walk ins and some book by appointment. Ask about the price and the wait at the same time.
Are smog places open on Sundays?
What if a smog station says it cannot test my car?
A station may not have the equipment for your car, or it may decide the car is unsafe. Call another station first and ask if it can inspect your type of vehicle. If the station says the car is unsafe, the Smog Check Referee can help.
What if the station cannot test my car because of an address change?
DMV may not have updated your address or program area yet. Call the DCA Consumer Information Center at (800) 952-5210 for help.
Where can I get a smog certification?
You get a smog certificate at a licensed Smog Check station after your car passes. The station sends it to DMV electronically. It is good for 90 days.
Smog Check Price and Fees
How much does a smog check cost in California?
The statewide average price BAR reports was $67.20 for 2025, and it was about $69.66 in September 2026. Prices are reported by inspectors averages, and every station sets its own. You also pay the $8.25 state certificate fee if your car passes.
How much should a CA smog test cost?
Averages in 2025 ran from about $58 to about $73 depending on station type. They were $58.21 at non STAR test only stations and $72.64 at non STAR test and repair stations. Compare estimates before you choose.
Why do smog check prices vary so much?
BAR does not regulate inspection prices, so each station picks its own. Station type, car age and location all play a part. Shopping around can save you money.
Where is the cheapest smog check near me?
How much is a smog check in Los Angeles or San Diego?
BAR publishes a statewide average, not a price for each city, and stations set their own prices. The average was $67.20 in 2025. Call a few stations near you to compare.
What is the $8.25 smog certificate fee?
It is the state fee for the smog certificate. You pay it at the station only when your car passes. The station charges the same amount it pays the state, and it is posted separately from the inspection price.
Do I have to pay the certificate fee if my car fails?
No. The $8.25 fee is charged only on a passing certificate. You still owe the station for the inspection itself.
Does the station have to give me an estimate?
Yes. The station must give you an estimate, and you must authorize it before the inspection starts. This also applies to a pretest.
How much does a STAR smog check cost?
The 2025 average was $60.85 at STAR test only stations and $69.22 at STAR test and repair stations. Stations still set their own prices. Ask for the total before you agree.
Does a smog check cost more for an older car?
On average, yes. In 2025 the average was $64.40 on newer cars tested with the on board diagnostic system and $70.00 on cars tested with the older tailpipe system. Individual stations vary.
Are smog checks free in California?
No. Stations charge for the inspection, and you pay a $8.25 certificate fee if you pass. Help exists for repairs through the Consumer Assistance Program, but not for the inspection itself.
How much does it cost to fix a car that fails smog?
BAR data shows the average reported emissions repair was $756.68 in 2025. About 39 percent of repairs cost more than $650 and averaged $1,525. Your cost depends on the car and the problem.
STAR and Test Only Stations
What is a STAR smog check station?
A STAR station meets higher BAR performance standards. It can test all vehicles, including high polluters and directed vehicles. Your DMV renewal notice says if you must use one.
Why do I need a STAR smog check?
Your car was sent to STAR either because it fits a profile of cars more likely to fail or because it was picked at random. BAR randomly directs 2 percent of enhanced area cars each year. Only a STAR station or a Referee can certify directed vehicles.
How do I know if I need a STAR station?
Read your DMV registration renewal notice. If it says Smog Certification Required at a STAR station, you must use one. If it says only Smog Certification Required, any licensed smog station works.
What does test only mean at a smog station?
A test only station does Smog Check inspections but no emissions repairs. It may only do free minor fixes such as a hose it disconnected or a safety issue. It cannot send you to a repair shop it has a financial stake in.
What is the difference between STAR and a regular smog station?
STAR stations must meet higher performance standards and can test every vehicle. Regular stations cannot certify directed vehicles or gross polluters. STAR can be test only or test and repair.
Are all smog stations STAR certified?
No. In 2025 BAR counted 3,597 STAR stations out of 7,329 licensed stations. The rest are non STAR test only, test and repair, dealer, fleet, Referee and repair only stations.
What cars get sent to a STAR station?
BAR directs most 1999 and older cars, plus newer cars the model says are more likely to fail next time. It also sends a random 2 percent sample. The message shows on your DMV renewal notice.
What is a gross polluter?
A gross polluter is a car whose exhaust is far above the normal fail limit. Once repaired, it must be tested at a STAR station or by a Referee. A gross polluter that is not a fleet car may still qualify for CAP or a waiver.
Can I look up a station's STAR score?
Yes. BAR posts a public STAR Report Card at bar.ca.gov/star/report. You can search by station or by inspector license number.
What replaced the Gold Shield program?
STAR replaced Gold Shield. Gold Shield ended on December 31, 2012, and STAR began on January 1, 2013.
Can an inspector be STAR certified?
No. STAR certification is for stations, not for individual inspectors. A station's score depends on how its inspections hold up in follow up results.
Passing, Failing and Repairs
How do I pass a California smog check?
Fix a lit check engine light before you go. If you recently disconnected or replaced the battery, drive a week or two so the readiness monitors reset. Restore any modified engine software to factory settings or a CARB approved version.
Will my car pass smog with the check engine light on?
No. BAR says a vehicle will not pass a Smog Check with the check engine light on. Repair the cause first, then test again.
Can I clear the code right before the test to pass?
Clearing codes does not help. It resets the readiness monitors, so the car will likely show as not ready. On 2010 and newer cars, a stored permanent code can still fail you until the car completes 15 warm up cycles and 200 miles.
How long do I drive after a battery change or code reset?
BAR says to drive a week or two. Two weeks is the time in which most properly working vehicles set the monitors they need. Normal mixed driving works best.
What happens if my car fails the Smog Check?
You get a vehicle inspection report listing the reasons. Fix the problem, then retest. If your renewal notice names STAR, the retest must be at a STAR station. Help is available through CAP, retirement, a waiver or the Referee.
What makes a car fail smog in California?
The most common causes are a lit check engine light, readiness monitors that are not set, and modified engine software. Parts that are missing, damaged or not California legal can fail too. Older cars with worn parts fail more often.
What percent of cars fail smog in California?
BAR data shows 8.51 percent of initial tests failed in 2025. The rate was 7.78 percent for 2000 and newer cars and 17.88 percent for 1999 and older cars. The older the car, the higher the failure rate.
Can I pass emissions with the evap monitor not ready?
Right now, yes on 2000 and newer gasoline cars, because the evaporative monitor is the one monitor that may be incomplete. BAR adopted a rule effective October 1, 2025 that requires all monitors to be complete. BAR says the current pass rules stay in place and changes will be phased in with notice.
How many readiness monitors can be incomplete?
For gasoline cars, 1996 to 1999 models may have any one incomplete, and 2000 and newer may have only the evaporative monitor incomplete. Diesels from 1998 to 2006 may have none. Newer diesels may miss the particulate filter and NMHC catalyst monitors.
Can my car fail smog with no check engine light?
Yes. Not ready monitors, a stored permanent code, modified software, or failed visual and functional checks can all fail a car. Readiness problems caused about 53 percent of failures on newer cars in 2025.
What does a modified software result mean?
It means the engine software has been changed in a way that is not approved. Since July 19, 2021, that fails the Smog Check. Restore factory software or use a version with a CARB Executive Order.
Can I pass smog with a catalytic converter that is going bad?
No. A failing or wrong converter will show up as a fault or fail the inspection. Repair it first. If cost is a problem, check the Consumer Assistance Program and the repair cost waiver.
Do aftermarket parts like a cold air intake, headers or a cat back pass smog?
Only if the parts are legal in California. The Smog Check confirms aftermarket parts meet California requirements. Check with CARB's aftermarket parts program before you buy.
Will a high flow catalytic converter pass smog?
Only if it is the correct, California legal converter for your car. Wrong or aftermarket converters are a known cause of failures. Some models, such as the 2000 to 2007 Honda Accord SULEV, need the original equipment converter.
Do I need to retest at the same station?
No. You can retest at any licensed station. The exception is when your renewal notice says STAR, in which case the certifying retest must be at a STAR station.
How many times can I fail a smog check?
BAR's guidance describes repairing the car and retesting without naming a retest limit. If you spend at least $650 on emissions repairs and still fail, you may qualify for a repair cost waiver from the Referee.
What is an emissions warranty and can it cover my repair?
California certified cars must have a smog failure fixed free in the first 3 years or 50,000 miles. High priced parts get 7 years or 70,000 miles. Federal coverage runs 2 years or 24,000 miles, and 8 years or 80,000 miles for the catalytic converter and engine computer.
Does an oil change help me pass smog?
It can help a little. The Referee program says there is no guaranteed method, but regular maintenance such as oil changes helps your car run smoothly and improves your chances.
Can a loose gas cap fail a smog check?
On 1976 to 1995 cars, the test checks the fuel cap and the fuel vapor system, so a bad cap can fail. On newer cars, vapor system faults often set the check engine light, which fails.
What can I do if I cannot afford the repairs?
You have four options. CAP repair aid pays up to $1,450 on 1996 and newer cars if you qualify by income. CAP retirement pays $1,350 to $2,000 for the car. A repair cost waiver is possible after $650 in repairs, and the Referee can help with disputes.
What is the smog repair cost waiver?
It postpones your smog requirement for up to two years if you spend at least $650 on emissions repairs and diagnosis and the car still fails. You get one waiver per vehicle per owner. The Referee issues it.
Do I need to pass emissions to register my car?
If your DMV renewal notice says smog certification is required, yes. The passing certificate goes to DMV electronically. You can test up to 90 days before it is due.
How do I know if my car will pass smog?
Make sure the check engine light is off, the battery has not been disconnected for at least a week or two, and the software is stock. A pretest at a station can flag problems before the official inspection. The station must give you an estimate first.
I want my car to fail smog so I can retire it. How does that work?
You do not need to fail on purpose. The Vehicle Retirement Program pays $1,350 if your car failed its most recent check, with no income test. It pays $1,500 if you qualify by income and the car had any smog test within 180 days.
Why won't my car pass emissions?
Read the vehicle inspection report, which lists the exact reasons. The usual causes are a check engine light, monitors not ready, modified software or worn parts. Ask the station to explain the report.
Does a failed smog check show up in my record?
Yes. BAR keeps inspection history that anyone can look up by plate or VIN at bar.ca.gov/inspection. Results show from midnight the day after the test.
Smog Certificates and Inspection History
How long is a smog check good for in California?
A passing smog certificate is valid for 90 days. The station sends it to DMV electronically. After 90 days you would need a new one.
How long is a smog certificate good for when selling a car?
For a private sale it must be within the last 90 days. If a dealer sells the car, the dealer's certificate is valid for two years or until the car is sold and registered, whichever comes first.
How do I check if DMV received my smog certificate?
The station sends it to DMV electronically, so you do not mail anything. You can look up your car's inspection history at bar.ca.gov/inspection. Results show from midnight the day after the test.
How can I check my car's smog history for free?
Go to BAR's inspection history page at bar.ca.gov/inspection and search by license plate or VIN. It is free. It is also useful when you buy a used car.
How can I check my car's emissions status?
Your DMV registration renewal notice says if a smog certification is due. For past results, search the car's history at bar.ca.gov/inspection. A new passing result shows by midnight of the next day.
What does a smog certificate look like?
The certificate is electronic and goes straight to DMV. What you hold is the vehicle inspection report. It shows pass or fail, the reasons and any open safety recalls. Keep a copy.
How do I read a smog check vehicle inspection report?
The report states the inspection results and whether the car passed or failed. It also lists any open safety recalls for the vehicle. If you have questions, ask the station to walk you through it.
Do I need a paper smog certificate?
No. The certificate goes to DMV electronically, so you do not carry one to the counter. Keep your vehicle inspection report for your records. Give the buyer a copy if you are selling.
Can one smog check cover both a sale and my renewal?
Often yes. A car that got a certificate at a change of ownership or initial registration in the past six months does not need the biennial check. The certificate itself is valid for 90 days.
What if my smog check expires before I can use it?
You will need a new inspection. A certificate is good for 90 days only. Plan the test so you finish your DMV or sale paperwork inside that time.
Diesel Smog Checks and Clean Truck Check
Do diesel cars and trucks need a smog check in California?
Yes, for diesels from model year 1998 and newer with a gross weight of 14,000 pounds or less. Diesels from 1997 and older do not. Heavier diesels fall under CARB's Clean Truck Check instead.
What year diesel is smog exempt in California?
Diesels from model year 1997 and older are exempt, and so are diesels over 14,000 pounds. There are no model year exceptions for newer diesels. They get neither the 4 year sale exemption nor the 8 year renewal exemption.
What is Clean Truck Check?
Clean Truck Check is CARB's heavy duty smog program. It covers nearly all diesel and alternative fuel vehicles over 14,000 pounds on California roads, including out of state trucks and buses. It was created by SB 210 in 2019.
Which vehicles do not need Clean Truck Check?
Zero emission, emergency, military tactical and historical vehicles are not covered. Out of state motorhomes and very low NOx new engines through 2027 are also left out. California registered motorhomes are covered.
How often does Clean Truck Check testing happen?
Testing is twice a year, tied to your DMV registration month and six months later. Starting in October 2027, vehicles with on board diagnostics test four times a year. Motorhomes and farm vehicles stay on an annual schedule.
How much is the Clean Truck Check fee?
The annual compliance fee is $32.13 for 2026 and $33.12 for 2027. It was $31.18 in 2025. CARB adjusts it each year for California inflation.
When did Clean Truck Check testing start?
Roadside emissions monitoring began in January 2023. Testing requirements took effect October 1, 2024. Every deadline on or after January 1, 2025 needs a passing test.
What does a Clean Truck Check test involve?
Newer diesels from 2013 and alternative fuel engines from 2018 get an on board diagnostics scan. Diesels from 2012 and older get a smoke opacity test plus a visual check. Older alternative fuel engines get a visual check only.
Who can do a Clean Truck Check test?
Only a CARB credentialed tester. Testers take CARB's free online course, score at least 80 percent, and renew every two years.
How do I become a Clean Truck Check tester?
Take CARB's free online course and pass the exam with 80 percent or better. You renew the credential every two years. CARB runs a hotline at (866) 634-3735.
What happens if I miss a Clean Truck Check deadline?
You can face a DMV registration hold. A flagged truck gets a Notice to Submit to Testing and has 30 days to pass. You can submit a passing test up to 90 days before the deadline.
Do out of state trucks need Clean Truck Check?
Yes. The program covers heavy duty diesel and alternative fuel vehicles operating on California roads, including those from other states. Out of state motorhomes are the exception.
What Happens During a Smog Check
How long does a smog check take in California?
About 30 minutes, according to BAR. A thorough inspection often takes 20 minutes or more. Wait time at the station is extra.
What is a smog check?
A Smog Check is a state inspection that tests your car's emissions system. It can include a visual check, a functional check, an on board diagnostics check for most 2000 and newer cars, and a tailpipe test for older cars. BAR runs the program.
What do they check in a smog check?
The inspector looks at emissions parts such as the catalytic converter, EGR, fuel vapor system and sensors. The inspector also checks the check engine light and scans the on board computer. Older cars also get a tailpipe test.
What do I need to bring to a smog check?
Bring your DMV registration renewal notice if you have it, since it helps the station confirm your car's details. You can still test without it. Fix a lit check engine light first.
What should I do before a smog check?
Repair any check engine light. Drive a week or two after a battery change. Return modified software to stock or a CARB approved version. A pretest is also an option.
How does smog testing work for 2000 and newer cars?
The inspector plugs a certified device into the car's computer instead of using a tailpipe probe. It checks the check engine light, the readiness monitors and stored codes. A visual check of emissions parts comes with it.
How does smog testing work for 1999 and older cars?
These cars get a tailpipe test on the BAR-97 system. In enhanced areas most use a dynamometer, which is like a treadmill for the wheels. In basic and change of ownership areas the test is a two speed idle.
What is a pretest?
A pretest is a practice inspection that may show problems before the official one. Stations may offer it, and they must give you an estimate first.
What is a smog inspector?
A smog inspector is a technician licensed by BAR to perform Smog Check inspections. Inspectors log in with a palm scanner. BAR counted 13,110 licensed technicians in 2025.
Should I get an oil change before a smog check?
It is not required. The Referee program says there is no guaranteed way to pass, but regular maintenance helps your car run well. Do not skip the repairs that matter, like a check engine light.
Is a smog test the same as an emissions test?
In California, people use both terms for the Smog Check inspection of your car's emissions system. The official name is Smog Check. It is run by BAR.
What does the visual part of a smog check cover?
The inspector looks at the PCV system, fuel vapor system, catalytic converter, EGR, ignition spark controls, fuel metering, air injection, computers and sensors. The inspector also checks for fuel leaks and visible smoke.
Preguntas en Español
¿Dónde puedo hacer el smog check cerca de mí?
Puede hacerlo en cualquier estación con licencia de BAR (Oficina de Reparación Automotriz). Use nuestro buscador de estaciones para ver las más cercanas. Llame antes para confirmar que prueban su tipo de carro.
¿Cuánto cuesta el smog check en California?
El precio promedio que reporta BAR fue de $67.20 en 2025. Cada estación pone su propio precio, así que compare. Si su carro pasa, también paga $8.25 de cuota estatal por el certificado.
¿Qué necesito para hacer el smog check?
Lleve el aviso de renovación del DMV si lo tiene. Repare la luz de revisar motor antes de ir. Si desconectó la batería, maneje una o dos semanas antes de la prueba.
¿Cuánto tiempo sirve un smog check en California?
El certificado es válido por 90 días. La estación lo envía al DMV de forma electrónica. Después de 90 días necesita uno nuevo.
¿Qué pasa si mi carro no pasa el smog check?
Recibirá un reporte con las razones. Repare el carro y vuelva a hacer la prueba. Si su aviso dice estación STAR, debe repetirla en una estación STAR. También existen ayudas como CAP y el Referee.
¿Cómo hago que mi carro pase el smog check?
Repare la luz de revisar motor, porque con ella encendida no pasa. Maneje una o dos semanas después de cambiar o desconectar la batería. Deje el software del motor de fábrica o con aprobación de CARB.
¿Cuánto es el límite de ayuda para reparar mi carro?
El programa CAP paga hasta $1,450 en carros 1996 y más nuevos y hasta $1,100 en carros 1976 a 1995. Debe cumplir el límite de ingresos y esperar la carta de aprobación antes de reparar. Llame al (866) 272-9642.
Who Needs a Smog Check and When
How often is a smog check required in California?
Every two years when you renew your registration in a biennial area. You also need one when you sell most cars and when you register a car in California for the first time. Newer gas cars skip the renewal check for their first eight model years.
Do I need a smog check every year?
No. In biennial areas the renewal check is every other year. Your DMV notice tells you when it is due.
What cars need a smog check in California?
Gasoline, hybrid and alternative fuel vehicles from model year 1976 and newer need one. So do diesels from 1998 and newer that weigh 14,000 pounds or less. RVs, motorhomes, collector cars and government vehicles count if they meet those rules.
How do I know if I need a smog check?
Look at your DMV registration renewal notice. It says Smog Certification Required or Smog Certification Required at a STAR station when one is due. You also need one when you sell or register a car for the first time.
Are smog checks going away in California?
No. BAR keeps updating the program. A new Smog Check Manual became required on July 1, 2026, and a rule requiring all readiness monitors took effect October 1, 2025. Plan on needing the check.
Does an older car need a smog check, like a 1995, 2000 or 2005?
Yes. Any gasoline or hybrid car from model year 1976 forward needs one if it is in an area that requires it and past its first eight model years. That covers every model from 1976 through 2018 at 2026 renewals. Diesels need it from 1998 forward.
Does a new car, like a 2022 or 2023, need a smog check?
Not for renewal. Gas and hybrid cars eight model years old and newer skip the renewal check and pay a smog abatement fee. Add 8 to the model year to find the first check, so a 2022 needs its first in 2030 and a 2023 in 2031.
What year cars do not need a smog check in California?
Gasoline, hybrid and alternative fuel cars from model year 1975 and older are exempt. Diesels from 1997 and older are exempt. Electric vehicles and motorcycles are exempt too.
Do hybrids need a smog check?
Yes. Hybrids follow the gasoline rules. Model year 1976 and newer need one, with the same 8 year renewal and 4 year sale exemptions. Hybrids were added to the program in January 2015.
Do electric cars or Teslas need a smog check?
No. Electric vehicles do not need a Smog Check.
Do motorcycles need a smog check in California?
No. Motorcycles are exempt from Smog Check for now. The law exempts them until the state adopts test procedures for motorcycles.
Do RVs and motorhomes need a smog check?
Yes, if they meet the model year rules. That means gasoline 1976 and newer or diesel 1998 and newer, up to 14,000 pounds. Heavier diesel motorhomes fall under Clean Truck Check.
Is there a military exemption for smog checks?
No. Active duty members and veterans still need a smog check on California registered vehicles. Nonresident active duty personnel who drive in California are covered by a federal rule enforced by each base.
Which California counties require smog checks every two years?
Thirty four counties are biennial across the whole county, including Los Angeles, Orange, Alameda, Santa Clara, Sacramento, San Francisco and Fresno. Six counties are partial and depend on your ZIP code. They are El Dorado, Placer, Riverside, San Bernardino, San Diego and Sonoma.
Does Riverside, San Bernardino or San Diego County need smog checks?
Only for certain ZIP codes. DMV lists the ZIPs in each partial county, so check your ZIP against that list or read your renewal notice. If your notice says smog is required, you need it.
Which California counties do not require a smog check?
DMV lists 34 whole counties and 6 partial counties for the every other year check. Counties on neither list are not covered by that rule as DMV publishes it. A check at a sale or a first registration is a separate rule, and your renewal notice always has the final word.
Does Catalina Island need a smog check?
No. Avalon on Catalina Island, ZIP code 90704, is exempt by law. It is the only exempt ZIP in Los Angeles County.
What is the difference between enhanced, basic and change of ownership areas?
Enhanced areas have the toughest air quality problems, test every two years and send older cars through a dynamometer test. Basic areas also test every two years with a simpler tailpipe test. Change of ownership areas only require a check on a sale or first registration.
What if I live in one area but garage my car in another?
The program area follows your DMV registration ZIP code. A car registered in an enhanced area but kept in a basic area still gets the enhanced inspection.
How early can I get a smog check before my registration is due?
Up to 90 days before it is required. The certificate is good for 90 days, so the timing works.
Can I get a smog check without my renewal notice?
Yes. BAR says to bring the notice if you have it because it helps the station verify your car.
When did smog checks start in California?
BAR launched the Smog Check program in 1984. It grew out of a 1982 law that created the Motor Vehicle Inspection Program.
Exemptions, Abatement and Transfer Fees
What is the smog abatement fee in California?
It is a yearly fee you pay with your DMV registration instead of a renewal smog check on a newer gas or hybrid car. It is $20 a year for model years 1 to 6 and $25 a year for years 7 and 8. DMV lists it on your renewal bill.
How much is the smog abatement fee?
It is $20 per year in the first six model years and $25 per year in years 7 and 8. Over eight years that adds up to $170. DMV also lists a separate $8 alternative fuel and technology fee.
When will my car need its first smog check?
Add 8 to the model year. A 2020 model needs its first renewal smog check in 2028. Diesels do not get this exemption.
When does the smog exempt year change?
It moves forward one model year each calendar year. A car is exempt at renewal until eight model years have passed. The 2018 model needs its first check at 2026 renewals, and the 2019 model at 2027 renewals.
Where does the smog abatement fee money go?
An $8 add on from a 2008 law is split between two state funds, $4 each. One funds air quality improvement. The other funds alternative fuel and vehicle technology. That add on ends on July 1, 2035.
What is the smog transfer fee?
It is an $8 fee you pay DMV on a sale of a gas or hybrid car four model years old or newer. You pay it instead of getting a smog check. Diesels do not qualify.
Do diesel vehicles get the 4 year or 8 year smog exemption?
No. BAR says there are no model year exceptions for diesel vehicles. A diesel from 1998 or newer needs a check at renewal and at sale.
Can a new car still be sent for a smog check?
Yes in a few cases. BAR can require one if remote sensing shows a likely fail or tampering, if the car is registering from out of state or specially constructed, or if it was randomly selected.
Are collector cars exempt from smog?
Not automatically. BAR says collector cars need a smog check if they meet the model year rules. Gas cars from 1975 and older are exempt, as they are for everyone.
Is a 1976 car exempt from smog?
No. 1976 is the first model year that needs one. Gas cars from 1975 and older are exempt.
Are trailers and two stroke engines exempt from smog?
Yes. DMV lists trailers as not needing a smog inspection. Engines with two cylinders or fewer and two stroke engines are exempt too. Rotary engines are not exempt.
Why did I get a smog abatement fee instead of a smog check?
Your car is within its first eight model years, so California collects the fee in place of the renewal check. That is the rule for gas, hybrid and alternative fuel cars. Your first check comes at model year plus 8.
Smog Technician Careers
How do I get a smog technician license in California?
You apply through BAR, which licenses smog inspectors and repair technicians. Start on the licensing pages of bar.ca.gov. BAR also offers help with licensing for military members, spouses and veterans.
How many smog technicians are there in California?
BAR counted 13,110 licensed technicians in 2025. Of those, 8,148 held an inspector license only and 4,962 held both inspector and repair licenses. About 9,982 actually performed a test.
Do I need a license to work at a smog station?
Yes. Only a licensed inspector can perform Smog Check inspections, and the station needs a BAR license too. Inspectors sign in with a palm scanner.
Smog Check Basics
What is smog certification?
It is the passing result a licensed station sends to DMV after your car passes the Smog Check. The certificate is valid for 90 days. You need it for renewal, sale or first registration when the rules call for it.
How do I get a smog check?
Find a BAR licensed station, get a written estimate and have the inspection done. If you pass, the station sends the certificate to DMV. Then finish your registration, sale or transfer within 90 days.
What is the Bureau of Automotive Repair?
BAR is the California agency that runs the Smog Check program. It sits in the Department of Consumer Affairs and was created in 1972. It licenses smog stations and technicians and handles complaints.
How many smog checks happen in California each year?
BAR counted 11.28 million initial Smog Check tests in 2025. All tests, including retests, reached 12.2 million. About 8.5 percent of the initial tests failed.
How many smog stations are there in California?
BAR counted 6,811 licensed smog stations of all types in September 2026. That is down from 8,831 in 2019. About 3,597 of the 2025 stations were STAR.
How do I file a complaint about a smog station?
File it with BAR at bar.ca.gov/complaint. BAR mediates complaints and can open an investigation. Final citations and disciplinary actions are posted on bar.ca.gov.
CAP Repair Help and Vehicle Retirement
What is the Consumer Assistance Program (CAP)?
CAP is a BAR program that helps pay for emissions repairs on a car that failed its biennial smog check. It also pays you to retire a car. You must meet income and vehicle rules.
How much does CAP pay for smog repairs?
Up to $1,450 for 1996 and newer cars and up to $1,100 for 1976 to 1995 cars. You pay a 20 percent copay up to the cap point. Amounts rose on January 1, 2025.
Will California give me $1,200 if my car fails smog?
That was the old limit. It rose to $1,450 for 1996 and newer cars on January 1, 2025, and to $1,100 for 1976 to 1995 cars. You must qualify by income and wait for approval before repairs.
Who qualifies for CAP repair assistance?
You must be the registered owner with the title in your name, and your household income must be at or below 225 percent of the federal poverty level. In 2026 that is $35,910 for one person and $74,250 for a family of four. The car must have failed a biennial check.
What repairs does CAP not cover?
CAP does not cover body work, brakes, completing OBD drive cycles, mufflers, tailpipes, tires, water pumps, radiators or air conditioning. It also leaves out knock sensors on 2004 and older Nissans.
Can I start repairs before CAP approves me?
No. BAR will not pay for repairs you start before the eligibility letter arrives. Repairs must be done at a STAR test and repair station.
How do I apply for CAP?
Apply online at bar.ca.gov/caponline, by mail, or by phone at (866) 272-9642. Phone hours are Monday to Friday, 8:30 to 4:30.
Is there a free smog voucher program in California?
CAP does not give free inspections, but it helps pay for repairs after a failed check. It can also pay you to retire a car. Both need eligibility approval.
How much does California pay to retire a car?
The state pays $1,350 with no income test if your car failed its most recent smog check. It pays $2,000 if you also meet the income limit. It pays $1,500 if you meet the income limit and had any smog test in the last 180 days.
What condition must my car be in for retirement?
It must run under its own power, weigh 10,000 pounds or less, and have continuous registration with no lapse over 120 days in the past two years. It must have doors, a hood, a windshield, a bumper, exhaust and lights. You can retire one car per 12 months as the sole owner.
Can I retire a car that passed smog?
Yes, if you qualify by income. BAR pays $1,500 to income eligible owners whose car had any smog test, pass or fail, within 180 days.
Fraud and Illegal Smog Checks
What is a hot smog?
A hot smog is slang for a pass certificate given without a real inspection or with a trick to make the car pass. It is fraud. BAR treats fraud as grounds for formal discipline, including license revocation.
Is a hot smog illegal?
Yes. It is fraud, and a station that does it can lose its license. BAR can file an accusation through the Attorney General. Remedial training is not available for fraud.
How do illegal smog checks work?
A dishonest station enters false results or tricks the equipment so a car appears to pass. That is fraud. BAR's 2024 equipment rule requires devices to capture location data and spot OBD simulators.
How can I tell if a smog station is illegal?
Warning signs include a guaranteed pass, no real inspection or no written estimate. Check the station's license and enforcement record on bar.ca.gov. Read more on our illegal smog check stations page.
How does BAR catch fraud?
BAR reviews smog data, the STAR scoring system, and location and simulator detection on the inspection devices. From 2016 to 2025 it sent 1,534 smog data cases to the Attorney General. Those led to 1,356 license revocations.
How can I report an illegal smog check station?
File a complaint with BAR at bar.ca.gov/complaint. BAR mediates complaints and can open an investigation. Final citations and disciplinary actions are posted on bar.ca.gov.
How can I look up a station's enforcement history?
BAR posts citations and disciplinary actions at bar.ca.gov/enforcement. You can also check a license on the BAR license lookup.
Can I buy a fake smog certificate?
No. Every certificate goes from a licensed station to DMV electronically, and a fake or fraudulent one is illegal. Do not risk it. A legal path exists even for a car that cannot pass, such as CAP, a waiver or retirement.
How do I pass smog illegally or cheat a smog test?
We do not help with that. Cheating is fraud, and BAR names practices like clean piping and clean plugging as behaviors it penalizes. If your car will not pass, use a legal option such as repairs, CAP, a repair cost waiver, or retirement.
Can I pass smog with a catalytic converter delete or catless downpipe?
No. The inspection checks the catalytic converter, and the Smog Check also confirms aftermarket parts meet California rules. A car with a missing or converter that is not California legal should be repaired, not tested again as is.
Will an EGR delete or a deleted diesel pass smog?
No. The inspector checks emissions parts such as the EGR, and diesels from 1998 and newer have no model year exemption. Modified software also fails. The legal fix is to restore the parts and software.
The Smog Check Referee and Waivers
What is the Smog Check Referee?
The Referee is a state program run by the Foundation for California Community Colleges under a BAR contract. It handles disputes, repair cost waivers, engine swaps, kit cars, gray market cars and parts that are no longer made. Referees do not do repairs.
Can I get a smog waiver in California?
Yes. If you spend at least $650 on emissions repairs and diagnosis at licensed smog repair stations and still fail, you can apply to the Referee for a repair cost waiver. Smog test fees do not count.
How much do I have to spend to get a smog waiver?
At least $650 on emissions repairs and diagnosis. CAP repairs count. Smog inspection fees do not.
How long does a smog waiver last?
It postpones the requirement for up to two years. You get one waiver per vehicle per owner. The car must be fixed by the next biennial check or a sale.
When can't I get a repair cost waiver?
Not for tampered cars, for sales, or for the first registration of an out of state vehicle and similar cases. A visible smoke failure gets a waiver only for owners who qualify as low or moderate income.
How do I book a Smog Check Referee appointment?
Call 1-800-622-7733. Everyone starts with a virtual appointment, and the call comes from a blocked number. If you miss the call or no show, your file is locked for 60 days.
How soon will I hear back from the Referee?
The document review takes about 3 to 5 business days. After that, an onsite visit follows if needed. Onsite payment is by Visa or Mastercard only.
What if I disagree with my smog check result?
Make an appointment with the Smog Check Referee. Disputes are a big part of its work, with 5,475 in 2025. The Referee can give a second look at the car.
How do I pass smog after an engine swap?
Engine changes go through the Referee. It handled 970 of them in 2025. Call 1-800-622-7733 to start.
Do I need the Referee every time for a specially constructed car?
No. After a full Referee pass, you get a BAR Referee label. Regular stations can test the car from then on.
Is there an economic hardship extension for smog checks?
State law allows one for low income owners. It is rare, though. The Referee issued only 2 in 2025.
Buying, Selling and Transferring a Car
Do I need a smog check to sell my car in California?
Yes in most cases. The seller must get a valid smog certification and give the buyer a copy of the vehicle inspection report. Exceptions include gas or hybrid cars four model years old or newer, certain family transfers and cars from 1975 and older.
Who pays for the smog check when selling a car?
The seller. The seller must provide a valid smog certification at sale. The buyer asks for the report.
Can I sell my car in California without a smog certificate?
Only if an exception applies. The main ones are a gas or hybrid car four model years old or newer, a transfer between close family members, and a car from 1975 or older. Otherwise the seller must provide a certificate.
Can I sell a car that will not pass smog?
The seller must provide a valid certification, so the car has to be repaired first. If the cost is too high, look at CAP repair aid or retire the car through CAP retirement.
Do I need a smog check to transfer a title?
In most sales, yes. The exceptions include a transfer within the 90 day life of a certificate, transfers between close family, gas cars four model years or newer (pay $8) and adding an owner to a title.
Do family transfers need a smog check?
A transfer between spouse, parent, grandparent, sibling, child or grandchild does not. A family member who bought the car for you without titling it in their own name first does trigger one.
Do dealerships do smog checks?
A dealer is responsible for the smog check on the cars it sells. A car bought from a dealer must have passed within the past two years. The dealer's certificate is valid for two years or until the car is sold and registered.
What if the seller did not give me a smog check?
For a private sale, the car must have passed in the last 90 days, so ask the seller for the report. You can also check the history at bar.ca.gov/inspection. Do not complete the deal until you see it.
How can I check a used car's smog history before I buy?
Search the plate or VIN at bar.ca.gov/inspection. It shows past inspection results. Ask the seller for the current vehicle inspection report too.
How long do I have to transfer a car after buying it?
Buyers have 10 days to transfer ownership after a private purchase. Sellers have 5 days to report the sale to DMV.
Do I need a smog check if I add someone to my title?
No. Adding an owner to the title is one of the transfers that does not need a smog check.
Does a diesel need a smog check when sold even if it is new?
Yes. Diesels are carved out of the four model year sale exemption. A 1998 or newer diesel up to 14,000 pounds needs one at sale.
Moving to California and Imported Cars
Do I need a smog check to register an out of state car in California?
Yes. A smog check is required to register a vehicle in California for the first time, including cars bought or previously registered in another state. Even exempt age cars must test on initial registration.
Will my out of state car pass California smog?
It can if it meets California standards and its aftermarket parts are California legal. The check confirms the parts. Many cars sold in other states are built to the same standards.
What is the 49 state car rule?
A car that is less than 2 years old with fewer than 7,500 miles at purchase cannot be brought in or registered unless it was built to California standards or qualifies for an exemption. Forms like REG 256F list the exemptions.
Can I get a repair waiver on an out of state car?
No. A repair cost waiver is not available on initial registration of an out of state, direct import, engine changed, alternative fuel or specially constructed vehicle.
How do I register an imported car in California?
Registration fees are due within 20 days of the car entering California. A car with no federal certification and US emissions labels gets a NON USA title brand. A gray market car may need the Smog Check Referee.
Do military members moving to California need a smog check?
Yes for California registration, because there is no military exemption. Nonresident active duty personnel who drive in California are covered by a federal rule that each base enforces, usually with a passing report for a base sticker.