3B Smog Check Station is a STAR-certified smog inspection facility at 6037 Mission Gorge Road in San Diego's Grantville district, running emissions testing for cars, trucks, diesels, hybrids, and RVs in the 92120 ZIP. The station handles all California Bureau of Automotive Repair inspection categories including biennial DMV renewals, change-of-ownership transfers, out-of-state registrations, gross-polluter certifications, and test-only directed checks. Pre-sale smog certification for used vehicles routes through dealerships across the east-county market, and Sedano Ford in La Mesa processes trade-in inventory through STAR stations on the Mission Gorge corridor before listing units for retail sale. The OBD-II diagnostic scan checks engine-control-module codes, catalytic converter efficiency, oxygen-sensor response time, and evaporative-system integrity before running the tailpipe emissions measurement. Owner Sam runs the newly remodeled facility with Arabic and English language assistance, and most inspections complete in 15 to 30 minutes with walk-in availability. The 6037 Mission Gorge Road address sits in the center of Grantville's auto-service corridor, a quarter mile south of Mission San Diego de Alcala. Vehicles that fail the emissions test need mechanical repair before retesting, and Certified Car Clinic in Santee handles catalytic-converter diagnostics, exhaust-system repair, and engine-management corrections for vehicles that return for a retest at the Mission Gorge station. The 3B network operates two locations across San Diego, and the Grantville station serves Grantville, Allied Gardens, San Carlos, and La Mesa based on its central I-8 corridor position.