A Plus Smog

Yes. A Plus 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. A Plus 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.

A Plus Smog is open Monday 9 AM to 5 PM; Tuesday 9 AM to 5 PM; Wednesday 9 AM to 5 PM; Thursday 9 AM to 5 PM; Friday 9 AM to 5 PM; Saturday 10 AM to 3 PM. Closed Sunday. Hours can change on holidays, so call ahead if you are cutting it close.

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

A Plus Smog accepts Cash, Credit Card.

A Plus Smog has held a BAR smog license since 2022. You can verify the license status at bar.ca.gov.

A Plus 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) 652-2406 for a quote.

A Plus Smog does not take online bookings here, but walk-ins are welcome. Call (707) 652-2406 to check the wait.

Staff at A Plus 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.

A Plus 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 Vallejo are A1 Smog (0.2 mi) and Sg Smog Check Center (0.2 mi). Both are listed further up this page with their ratings and hours.