HAMILTON'S SMOG CHECK

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We are STAR certified
1032 First St. Novato, CA 94945
Mon–Fri: 8:30AM – 5:30PM
415-493-8801
415-378-3252 (Call or Text)
Smog Check Specials
✅ $7.00 Off Coupon
✅ Price Match Guarantee
✅ Free Retest (2000+ Vehicles)
Call for current pricing
With 2 bays, 2 certified technicians on duty, plus 2 advanced OIS systems for 2000+ newer vehicles. we can process up to 3 vehicles simultaneously.
We get you in and out fast.
vehicles 2000 and newer ready in 20 minutes
1996-1999 ready in 25 minutes
1976-1995 ready in about 35-40 minutes
All Vehicles Welcome
We feature a fully operational Dyno lane for 1976–1999 classic models, we offer discounted re-test for 1976-1999 model vehicles.
✅ Gas & Diesel | ✅ Hybrids | ✅ Trucks | ✅ Motorhomes & RVs

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Our services

We save you money by saving you time. We are the best and fastest smog check service in town.

Since 2021, we've been serving the community with efficient smog checks for all types of vehicles, including gasoline, diesel, and hybrid cars, as well as large trucks and RVs. Our certified technicians perform both STAR and non-STAR inspections, ensuring your vehicle meets all state requirements. Simply drive in for a hassle-free inspection, with most vehicles completed in under 30 minutes.

NEW: Now, we are doing smog inspection for_ heavy-duty diesel vehicles over 14,000 GVWR, 2013 and newer.

This is the new test required by CARB for heavy duty diesel trucks periodic testing.

Tips to help you pass a smog check

Preparing your vehicle correctly before a smog check can significantly increase your chances of passing.

For Vehicles 1996 and Newer

These steps help ensure your vehicle's emissions monitors have completed their "readiness" checks.

Complete a Drive Cycle: Over the days leading up to the test, drive your vehicle for approximately 100 miles under varied conditions (city and highway driving).
VERY IMPORTANT: While driving on the highway, keep the speed steady at 55 mph for 5-10 minutes intervals. Repeat that 3-5 times during the days leading to the day of the test.
Monitor the Dashboard Lights: Before arriving at the test station, ensure the Check Engine or Service Engine Soon light is not on while the vehicle is running. If this light is illuminated, it indicates a fault in the emissions control system. The vehicle must be repaired, and a full drive cycle must be completed again before it can pass the test.
Request a Pre-Check: When you arrive at a smog testing location, ask the technician to perform a readiness check first. Many stations, including ours, offer this pre-check service for free, though policies vary, so always confirm there is no charge beforehand.

For Vehicles 1976–1995

Perform Basic Maintenance: Have an oil change performed, replace the air filter and PCV valve before the test.
Consider a Tune-Up: If your vehicle's last tune-up was more than 50,000 miles ago or if it has been sitting in your driveway for a long time, it is highly recommended to schedule another one.
Check Fuel Level: Ensure the gas tank is between 1/2 and 3/4 full. Do not arrive with a nearly empty or completely topped-off tank.
Warm Up the Engine: Drive the vehicle for 30 minutes to an hour immediately before the test to bring the engine and catalytic converter up to optimal operating temperature and keep the vehicle running until it is hooked to the testing machine.
Seek Professional Advice: If you have concerns about your vehicle's readiness, consider having a professional mechanic perform a thorough inspection and any necessary repairs before the official test.

Disclaimer: These are general suggestions intended to improve the probability of passing a smog check. They are not all-inclusive and do not guarantee that your vehicle will pass solely by following them.

About us

We are a small business locally owned and family-operated committed to making your vehicle registration renewal fast and stress-free. We strive to provide a welcoming environment for every client.

Smog Check Assistance: If you require help paying for a smog check, please talk to us. We would be glad to assist in any way we can.
Veteran & Senior Discount/Recognition: If you are a veteran, please let us know when you visit us.
Thank You: We sincerely thank everyone for their continued support.