Midnight Smog is a licensed test-only smog check inspection facility in San Marcos, California, serving San Marcos, Vista, Carlsbad, Oceanside, and the greater North County area. We are open late, seven days a week, to make the process convenient for working drivers who can’t take time off during normal business hours. Our station is equipped to test most vehicles — including gasoline vehicles 2000 and newer vehicles smog tests, 1999 and older vehicle smog checks, hybrid smog checks, out-of-state vehicle smog checks, and DMV-required renewal smogs — Your smog testing results are transmitted directly to the DMV so you can complete your registration without delay. As a smog check test-only station, our job is to provide an accurate, compliant inspection with no repair sales pressure. If your vehicle does not pass on the first attempt, we offer a free retest. Our goal is simple: fast service, fair pricing, and a clean professional bay that keeps you on the road, legal, and moving forward with your busy schedule. If you need a smog check near me, an affordable smog check, a smog check coupon, a dmv smog check, or a smog inspection we can help.