Golden Gate Bridge on a clear day

Driving California into a clean future

Now performing CLEAN TRUCK CHECK

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Now performing CLEAN TRUCK CHECK 〰️

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Our Services

SMOG CHECK

Vehicles 2000 & Newer

The California Smog Check OIS (On-Board Diagnostics Inspection System) is primarily used to collect electronic emissions control system data from model year 2000 and newer vehicles. In addition, a comprehensive visual and functional inspection is performed to ensure all vehicles meet California inspection standards.

Black SUV parked on a coastal road with grassy dunes in the background.

Vehicles 1999 and older require an ASM (acceleration simulation mode) inspection, which involves testing a vehicle’s emissions while it is operated on a dynamometer, which simulates real driving conditions. This method provides accurate measurements of pollutants, ensuring that the vehicle meets state emissions standards for improved air quality. As with OIS inspections, a complete visual and functional inspection is performed.

SMOG CHECK

Vehicles 1999 and Older

Red pickup truck towing a large fifth-wheel trailer on a highway in a scenic desert landscape.

SMOG CHECK

Diesel, RV’s and Heavy Duty Vehicles

We offer comprehensive inspections for diesel vehicles, RVs, and heavy-duty vehicles to ensure compliance with California regulations and optimal operational performance. If applicable, the inspection process includes emissions testing and detailed visual inspection of key components. A check engine or OBD systems check is performed to identify any emission control issues, ensuring that your vehicle operates efficiently and adheres to all regulatory standards, contributing to a cleaner environment and enhanced performance.

Two semi-trucks driving on a highway at sunset, with "Clean Truck Check" logo at the top right.

We’re excited to announce that we now offer Clean Truck Check services! Ensure your truck meets environmental standards with our fast, reliable, and professional inspections. Our team is here to help keep your vehicle compliant and road-ready.

Person applying a yellow registration sticker with "CA 20" on a California license plate.

REGISTRATION SERVICE

At Auto Smog, we provide a convenient one-stop solution for vehicle owners to complete their smog checks and registration renewals in a single visit. Our service ensures that your vehicle meets state emissions standards, a key requirement for renewing registration. By streamlining both the testing and registration process, we save you time and hassle—eliminating the need to visit multiple locations or manage complex paperwork. For those who need quick, reliable service, Auto Smog helps you stay compliant with state laws and get back on the road faster.

About
our company

At Auto Smog, we have proudly served our community for over 25 years as a family-owned and operated business, providing fast, reliable, and efficient smog check services. Our team of certified professionals is committed to helping you keep your vehicle compliant with California’s emissions standards while contributing to a cleaner environment. With decades of experience, we’ve built a reputation for exceptional customer service and efficiency, making the smog testing process smooth and hassle-free. In addition to our regular smog check services, we now perform the Clean Truck Check for the California Air Resources Board (CARB), ensuring heavy-duty vehicles meet the latest emissions requirements. Whether you need a biennial smog check, a registration renewal, or a Clean Truck Check, we’re here to ensure your vehicle meets all compliance requirements.

Close-up of a car speedometer with a yellow check engine light illuminated and the needle pointing at 50 mph.

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