Vehicles that need a smog check
Gasoline, hybrid, and alternative-fuel vehicles - model year 1976 and newer
Diesel vehicles - model year 1998 and newer
RVs, motorhomes, collector cars, and government vehicles that meet the above criteria also need a Smog Check.
What is the smog check program?
The Smog Check Program is a vehicle inspection and maintenance program designed to improve the air we breathe. The program identifies vehicles with excess emissions so they can be properly repaired or retired. It has greatly reduced air pollution created by millions of cars in California.
What is a STAR station?
The STAR program was created to improve the overall quality of Smog Check inspections and help the state meet required emissions reductions. The program offers certification of Smog Check test-and-repair and test-only stations that must adhere to high inspection-based standards.
How can I help my vehicle pass the smog check?
Performing regular maintenance according to your owner’s manual and not tampering with the emissions-control equipment will help improve your vehicle’s chances of passing a Smog Check. If the “Check Engine” light comes on, get your vehicle repaired as soon as possible—do not wait for the vehicle’s next scheduled Smog Check. A blinking or flashing light indicates a malfunction that should be addressed immediately to avoid serious damage to the vehicle. Check your owner’s manual for any parts or repairs that may be covered under your vehicle manufacturer’s emissions warranty.
What if my vehicle fails the smog check inspection?
The smog check station will provide you with a vehicle inspection report that shows your vehicle’s results and the reason(s) for the failure. If you have questions, ask the station to explain the information on the report. Any needed repairs should be performed by a station licensed to perform smog check repairs. After completing the repairs, have your vehicle retested? The station will provide you a final report once your vehicle passes Smog Check and will electronically send the certificate to DMV.
Smog Resources
What services do STAR stations provide?
STAR stations provide the following services:
Testing and certification of all vehicles subject to Smog Check.
Testing and certification of gross-polluting vehicles.
Testing and certification of directed vehicles, regardless of the station’s program area location.
Testing and certification of vehicles registered in enhanced areas and are intended for sale by a motor vehicle dealer licensed by the Department of Motor Vehicles at the dealer’s premises located in a basic or change of ownership area.
Vehicles that do not need a smog check
Gasoline, hybrid, and alternative-fuel vehicles - eight model years and newer (for vehicle registration renewal only)
Gasoline, hybrid, and alternative-fuel vehicles - four model years and newer (for change of ownership only)
Gasoline, hybrid, and alternative-fuel vehicles - model year 1975 and older
Diesel vehicles - model year 1997 and older
Diesel vehicles - with a gross vehicle weight rating of more than 14,000 pounds
Electric vehicles
Motorcycles