101 Express Smog

Yes. 101 Express Smog is STAR certified with the California Bureau of Automotive Repair, so it can test vehicles the DMV directs to a STAR station, including gross polluters.

Yes. 101 Express Smog is licensed as a Test Only smog station. This station performs the smog test and issues the certificate. It does not do repairs, so a failed vehicle has to be fixed elsewhere and brought back.

101 Express Smog is open Monday 9 AM to 5:30 PM; Tuesday 9 AM to 5:30 PM; Wednesday 9 AM to 5:30 PM; Thursday 9 AM to 5:30 PM; Friday 9 AM to 5:30 PM; Saturday 9 AM to 5:30 PM. Closed Sunday. Hours can change on holidays, so call ahead if you are cutting it close.

Yes. 101 Express Smog accepts walk-ins, so you can drive in without booking ahead.

101 Express Smog accepts Cash, Credit Card.

101 Express Smog has held a BAR smog license since 2019. You can verify the license status at bar.ca.gov.

101 Express Smog has not published a price on SmogCheckDeals. The Bureau of Automotive Repair puts the statewide average at $69.16 as of August 2026, about $65 for a 2000-or-newer vehicle and $73 for 1999-or-older, plus the $8.25 certificate fee. Call (707) 664-9600 for a quote.

101 Express Smog does not take online bookings here, but walk-ins are welcome. Call (707) 664-9600 to check the wait.

Staff at 101 Express Smog speak English.

Bring the car, your registration or DMV renewal notice, and a way to pay. Most smog checks take 15 to 30 minutes, and most visits are closer to 20.

101 Express Smog is a Test Only station, so it cannot do the repair. You would have the work done at a repair shop, then come back for the free retest within 30 days. California's Consumer Assistance Program covers up to $1,200 of emissions repairs for qualifying owners.

The closest alternatives in Petaluma are Victory Chevy Cadillac Olds Geo (0.6 mi) and Autoworld (0.6 mi). Both are listed further up this page with their ratings and hours.