The Smog King is a Star Certified smog testing station located in Fairfield California. The Smog King does smog tests for any car from Hybrid to Diesel fueled engines and ensures our customers that they will pass their annual inspections. The Smog King is open every day through out the week Monday to Sunday and will serve any car with no appointment needed. The Smog King also offers affordable testing and will price match any competitor. Servicing Fairfield California since 2014.