Contra Costa Test Only Smog

No. Contra Costa Test Only Smog is not STAR certified. If your DMV renewal notice says "STAR Station Required," you will need to visit a STAR certified station instead.

Yes. Contra Costa Test Only 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.

Contra Costa Test Only Smog is open Monday 8 AM to 6 PM; Tuesday 8 AM to 6 PM; Wednesday 8 AM to 6 PM; Thursday 8 AM to 6 PM; Friday 8 AM to 6 PM; Saturday 8 AM to 6 PM. Closed Sunday. Hours can change on holidays, so call ahead if you are cutting it close.

Yes. Contra Costa Test Only Smog accepts walk-ins, so you can drive in without booking ahead.

Contra Costa Test Only Smog accepts Cash, Credit Card.

Contra Costa Test Only Smog has held a BAR smog license since 2019. You can verify the license status at bar.ca.gov.

Contra Costa Test Only 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) 374-2993 for a quote.

Contra Costa Test Only Smog does not take online bookings here, but walk-ins are welcome. Call (707) 374-2993 to check the wait.

Staff at Contra Costa Test Only 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.

Contra Costa Test Only 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 Rio Vista are Abel Chevrolet Buick (0.3 mi) and Rio Vista Ford Inc (0.7 mi). Both are listed further up this page with their ratings and hours.