3 Reasons Your Car Didn’t Pass A SMOG Test (And How Much It Might Cost To Fix)

Cars

SMOG checks or emission tests exist due to the U.S. Environmental Protection Agency’s (EPA) regulation on passenger vehicles. Each state sets limits of nitrogen oxides (NOx) from emitting past certain levels out of your vehicle. However, requirements, frequency, and circumstances for SMOG testing vary wildly between states. For example, Alaska doesn’t require emissions tests, but on the other end of the spectrum, California, has one of the most stringent SMOG requirements of any state. Colorado has several RapidScreen roadside testing
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