Currently California requires smog checks if your car is newer than 1975 and more than 8 model years old.For example - Monterey County was the last jurisdiction to impose smog checks (and did so just as I left CA in 1988). I never had to smog a car in CA.
Smog Inspections - California DMV
Smog inspections are required when you register or renew registration for a vehicle in California, but there are some exceptions.
