Smog Guys

Yes. Smog Guys 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.

No. Smog Guys is licensed as a Test & Repair station. This station can run your smog test and, if the vehicle fails, diagnose and repair it in the same shop.

Smog Guys is open Monday 9 AM to 6 PM; Tuesday 9 AM to 6 PM; Wednesday 9 AM to 6 PM; Thursday 9 AM to 6 PM; Friday 9 AM to 6 PM; Saturday 9 AM to 4 PM. Closed Sunday. Hours can change on holidays, so call ahead if you are cutting it close.

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

Smog Guys accepts Credit Card, Debit Card, NFC/Contactless.

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

Smog Guys has held a BAR smog license since 2023. You can verify the license status at bar.ca.gov.

Smog Guys 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) 676-7664 for a quote.

Smog Guys does not take online bookings here, but walk-ins are welcome. Call (925) 676-7664 to check the wait.

Staff at Smog Guys 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.

Because Smog Guys is a Test & Repair station, it can diagnose and repair the problem in the same shop, then run the free retest within 30 days. If the repair bill is steep, California's Consumer Assistance Program covers up to $1,200 of emissions repairs for qualifying owners.

The closest alternatives in Concord are Hj Smog (0.1 mi) and Bmw Concord & Mini Authorized Service Of Concord (0.1 mi). Both are listed further up this page with their ratings and hours.