How often must vehicles undergo a Smog Check in California?

In California, vehicles are required to undergo a Smog Check every two years. This biennial requirement applies to most cars and trucks to ensure they are compliant with state emissions standards. The purpose of this regulation is to help reduce air pollution and improve air quality by ensuring that vehicles are operating efficiently and not emitting excess pollutants.

Some exceptions exist, such as for newer vehicles that are not yet due for their initial Smog Check and certain types of vehicles that may be exempt based on age or fuel type, but the general rule remains that a Smog Check is mandated every two years. This policy is part of California's broader efforts to maintain stringent environmental standards and promote public health.