Smog Star Express

Yes. Smog Star Express 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. Smog Star Express 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.

Smog Star Express is open Monday 8 AM to 7 PM; Tuesday 8 AM to 7 PM; Wednesday 8 AM to 7 PM; Thursday 8 AM to 7 PM; Friday 8 AM to 7 PM; Saturday 8 AM to 6 PM; Sunday 9 AM to 5 PM. Hours can change on holidays, so call ahead if you are cutting it close.

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

Smog Star Express accepts Credit Card, Debit Card, NFC/Contactless.

Google lists the following accessibility features at Smog Star Express: wheelchair accessible entrance, wheelchair accessible parking.

Smog Star Express has held a BAR smog license since 2014. You can verify the license status at bar.ca.gov.

Smog Star Express 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 (925) 356-6858 for a quote.

Smog Star Express does not take online bookings here, but walk-ins are welcome. Call (925) 356-6858 to check the wait.

Staff at Smog Star Express 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.

Smog Star Express 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 Concord are Concord Smog Tune & Brakes (0.1 mi) and Faster Auto Repair (0.2 mi). Both are listed further up this page with their ratings and hours.