South Gate Smog is a test-only facility that also offers auto registration services. The on-site garage provides smog tests that are performed on a first-come, first-served basis. Tests take roughly 10 minutes and results can be electronically submitted to the DMV instantly upon request. A small waiting area is available for customers with magazines to help pass the time. All makes and models of vehicles can be tested on-site. The business also offers title services, transfers and plate renewals. Walk-ins are accepted for registration services.