How often do you need a smog check?

Most vehicles in California are required to pass a Smog Check every two years for registration renewal. Your DMV Registration Renewal Notice will indicate if your vehicle needs a Smog Check. You may take your vehicle to any Smog Check station, unless it requires a Smog Check at a STAR station.

Every two years after the first 7 years of the vehicle's life. Exceptions are electric vehicles, motorcycles, natural gas vehicles, diesel vehicles 1997 and older and regular gas vehicles 1975 and older.