Royal Smog & Mechanic

Welcome to Royal Smog & Mechanic, your premier, full-service automotive care and emissions testing center conveniently located at 3330 Sonoma Blvd UNIT B in Vallejo, CA. Unlike test-only facilities, we offer the ultimate convenience of combining expert mechanical repairs with official smog certification all under one roof. Whether you simply need a rapid smog check for your routine DMV renewal or require advanced diagnostics and engine work to ensure your vehicle is capable of passing smog, our experienced mechanics have you covered. We take the stress out of California's strict environmental standards by providing honest evaluations, transparent pricing, and top-tier repair services to get your car running at its absolute best. Proudly serving the Vallejo community in 2026 and beyond, we are committed to getting your vehicle certified, repaired, and safely back on the road without the usual runaround. Stop by our shop today for comprehensive auto care you can trust!