clean air and so do the guys at RB Smog. When we check your emissions we get to use our technologically advanced systems. We are able to hook these systems up to your exhaust and discover the amount and kind of pollutants emitted by your car. If you don’t own a vehicle that’s hybrid, electric, natural gas-powered or manufactured in 1975 or before, we want to see you every two years! Keep your automobile legal and protect California’s crisp air with the smog check at RB Smog in Rancho Bernardo.