Smog Express at 355 Broadway in Chula Vista operates as a STAR-designated smog check station on the northern end of the Broadway corridor, processing DMV-required emissions inspections for registration renewals, change-of-ownership transfers, and out-of-state vehicle certifications. The station handles both gasoline and diesel platforms, and drivers whose vehicles need rental transport during an extended repair after a failed inspection coordinate through MC Car Rentals in Chula Vista while the vehicle is at a separate test-and-repair facility. Broadway's 91910 zip code places the station in western Chula Vista's densest smog-check corridor, where proximity to the E Street trolley station and Chula Vista Center Mall generates steady walk-in volume from residents completing DMV errands in the same trip. The inspection menu covers VIN verification alongside standard emissions testing, a dual service that streamlines the process for recently purchased vehicles, and commuters fueling at Mohsen Oil nearby add a smog check to the same Broadway stop. The BAR-97 analyzer measures tailpipe HC, CO, CO2, O2, and NOx concentrations in parts per million while simultaneously running OBD-II readiness-monitor verification across the vehicle's powertrain control module.