More Frequently Asked Questions

Q: For how long is a Smog Check certificate valid?

A: Section 44015 (e) of the California Health and Safety Code states that a Smog Check certificate of compliance or non-compliance is valid for 90 days.

Q: Who is responsible for obtaining a Smog Check when a vehicle is sold?

A: Section 24007 (b)(2) of the Vehicle Code states it is the responsibility of the seller to provide a valid smog certificate at the time of delivery of the vehicle. There is no provision in the law to sell a vehicle "as is."

Q: I recently smogged my vehicle; now I'm selling it. Do I need to smog it again?

A: According to Section 4000.1 (d)(1) of the California Vehicle Code, a car which has had a Smog Check and received a certificate of compliance in connection with an annual registration does not need to be smogged again when sold if the sale date is within 60 days of the registration renewal date.

Q: I bought a car but did not get a smog certificate. Now I need expensive repairs in order to register the vehicle. What should I do?

A: Contact the seller to see whether that person will work with you on repairs. If they are not willing to help you resolve the problem, your option is to pay for the repairs yourself and then attempt to recover those costs in court.

Q: I have a motor home. Is it safe to smog it on the dynamometer? What should I do?

A: Any vehicle with a Gross Vehicle Weight Rating (GVWR; fully loaded weight) of 8500 pounds or more is excused from dynamometer testing. Your Smog Check technician will be able to give any such vehicle the two-speed idle test. Some motorhomes with a GVWR of less than 8500 pounds still may not be safe for dynamometer testing. If your Smog Check technician decides he or she cannot safely test your motorhome on the dynamometer, they should write that on your invoice. Then, call the Referee Scheduling Center at 800-622-7733 and make an appointment at the nearest Consumer Assistance and Referee Center. Bring your invoice. The referee will be able to give you the two-speed idle test.

Q: What Vehicle model years are required to get a biennial smog check?

A: The 1976 model year is the earliest model year vehicle required to participate in the biennial Smog Check Program. Vehicles six years old and newer are not required to participate in the biennial Smog Check Program.

Q: I have a vehicle that is six model years old or newer. My DMV registration renewal notice says it must have Smog Check, but I thought it was exempt from the biennial Smog Check requirement.

A: A vehicle is excused from Smog Check until it is seven model years old. DMV computers are designed to recognize the exemption and process your renewal accordingly. Go back the DMV to resolve this problem. If you are unable to resolve the problem with DMV, the State Referee can help. Call the Referee Scheduling Center at 800-622-7733 and make an appointment at the nearest Referee facility. Note: A Smog Check certificate of compliance is required upon transfer of ownership for vehicles that are older than four model years.

Q: I'm planning to register my vehicle as non-operational this time around. Do I still need a Smog Check?

A: No, the Smog Check is only for operational vehicles. However, if you miss your biennial Smog Check while the vehicle is non-operational, you will be required to get a smog inspection prior to bringing the vehicle back to operational status.

Q: Why is my car being tested on new smog equipment?

A: The new equipment and the new test, which is performed under simulated driving conditions, is required by state law in the state's smoggiest regions (Enhanced Areas) in order to meet federal clean air standards. The new equipment tests for oxides of nitrogen (NOx), an important smog-causing compound. The old equipment did not test for NOx.

Q: What is an Enhanced Area?

A: An Enhanced Area is one which has been designated by the U.S. Environmental Protection Agency as an area which does not meet federal health standards for ozone.

Q: Why are Smog Check stations using the new equipment to conduct the old two-speed idle test?

A: Not all vehicles are compatible with the new dynamometer. Vehicles with full-time four wheel drive, with non-disengageable traction control, or with a Gross Vehicle Weight Rating of greater than 8,500 pounds do not go on the dynamometer.

Q: What is a Gold Shield Station

A: Gold Shield stations are licensed Smog Check test-and-repair stations that meet high performance standards and are certified by the state to guarantee their emissions-related repairs on Gross Polluters (but not limited too), the small percentage of vehicles that pollute the most.

Inadequate Repairs Cost the Consumer. Many vehicles that fail their Smog Check at Gross Polluter levels are not adequately repaired and require further repairs. Since a Gross Polluter must be repaired at a test-and-repair facility and certified at a separate Test-Only Station, inadequate repairs can cause these vehicles to go back and forth, or "ping-pong," between these different facilities, costing consumers time and money.

Help for the Consumer. The Gold Shield program combats "ping-ponging" by helping consumers identify Smog Check stations that guarantee Gross Polluters will be repaired right the first time or further repairs will be made at no cost.

The Consumer's Responsibility. When a Gross Polluter is brought into a Gold Shield station, the technician examines the vehicle and recommends necessary emissions-related repairs. If the vehicle owner does not agree to have these repairs made, the station will not be held responsible for any additional repairs that may be needed to certify the vehicle and bring it into compliance with state vehicle emissions requirements.