Areas of the State
All areas of California require Smog Check inspections when a vehicle changes ownership or is registered for the first time in California. Most areas also require testing every two years, at the time of registration renewal. The Smog Check program divides the state into three areas launch x431 v plus, with different requirements for each:
Enhanced Areas: These areas do not meet federal or state air quality standards for ozone and carbon monoxide and are California's smoggiest urbanized areas. Biennial Smog Checks are required here.