Good question! The smog check itself should be about twenty minutes long.
To get a smog test, a requirement in 33 states, you’ll need to head to a certified location approved by your state’s DMV. While there, your car will be checked to ensure it passes all emissions tests.
While this test will only take around twenty minutes, how long you’ll need to be at the smog check will depend on how many cars are in front of you and how busy the shop is. It’s worth calling ahead or making an appointment to cut down on wait time.