Auto Smog Center

Yes. Auto Smog Center Llc 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.

Auto Smog Center Llc is open Monday 8:30 AM to 6 PM; Tuesday 8:30 AM to 6 PM; Wednesday 8:30 AM to 6 PM; Thursday 8:30 AM to 6 PM; Friday 8:30 AM to 6 PM; Saturday 8:30 AM to 6 PM. Closed Sunday. Hours can change on holidays, so call ahead if you are cutting it close.

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

Auto Smog Center Llc accepts Cash, Credit Card.

Auto Smog Center Llc has held a BAR smog license since 2026. You can verify the license status at bar.ca.gov.

Auto Smog Center Llc 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) 674-8444 for a quote.

Auto Smog Center Llc does not take online bookings here, but walk-ins are welcome. Call (925) 674-8444 to check the wait.

Staff at Auto Smog Center Llc 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.

Auto Smog Center Llc 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 (0.2 mi) and Four Corners Union (0.2 mi). Both are listed further up this page with their ratings and hours.