Price
Call for price
Hours
Open Mon–Sat
Station type
Test Only
Appointments
Walk-ins welcome
Hours
- Monday
- 8:30 AM – 6 PM
- Tuesday
- 8:30 AM – 6 PM
- Wednesday
- 8:30 AM – 6 PM
- Thursday
- 8:30 AM – 6 PM
- Friday
- 8:30 AM – 6 PM
- Saturday
- 8:30 AM – 6 PM
- Sunday
- Closed
Good to know
Languages
English
Payment
Cash, Credit Card
What to expect at Auto Smog Center
Auto Smog Center is licensed by the Bureau of Automotive Repair as a Test Only smog station in Concord. It runs the inspection and issues the certificate but does no repairs. It is not STAR certified, so if your DMV renewal notice says "STAR Station Required" you will need a different station.
Walk-ins are welcome. Most smog checks take 15 to 30 minutes, and most visits are closer to 20.
What to bring
Your registration or DMV renewal notice
It says whether the car needs a STAR station.
The car, with the check engine light off
On a 2000-or-newer car, a lit check engine light fails the test on its own.
A way to pay
The $8.25 state certificate is paid on top of the test when the car passes, unless the station's price or coupon includes it.
What if I fail?
- Auto Smog Center doesn't do repairs, so the car goes to a repair shop and comes back for the retest.
- Each station sets its own retest price, so ask before the first test.
- BAR's Consumer Assistance Program pays up to $1,450 toward emissions repairs for income-eligible owners.
2241 Monument Boulevard, Suite U, Concord, CA 94520
Get directions →Hours
- Monday
- 8:30 AM – 6 PM
- Tuesday
- 8:30 AM – 6 PM
- Wednesday
- 8:30 AM – 6 PM
- Thursday
- 8:30 AM – 6 PM
- Friday
- 8:30 AM – 6 PM
- Saturday
- 8:30 AM – 6 PM
- Sunday
- Closed
Other stations near Auto Smog Center
Four Corners Union
2025 Monument Blvd
Concord Smog Tune & Brakes
2510 Monument Blvd
Bay Area Smog
2575 Monument Blvd #f
Faster Auto Repair
2655 Monument Blvd #j
Auto Electric And Fuel
2655 Monument Blvd #b
Nearby cities in Contra Costa County
Questions about Auto Smog Center
Auto Smog Center 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.
Auto Smog Center accepts Cash, Credit Card.
Auto Smog Center has held a BAR smog license since 2026. You can verify the license status at bar.ca.gov.
Auto Smog Center 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 does not take online bookings here, but walk-ins are welcome. Call (925) 674-8444 to check the wait.
Staff at Auto Smog Center speak English.
The closest alternatives in Concord are Four Corners Union (0.2 mi) and Concord Smog Tune & Brakes (0.2 mi). Both are listed further up this page with their ratings and hours.
How we get this data: BAR licenses and STAR status, Google hours and ratings, coupons published by the station.
Verify this station’s license and STAR standing at bar.ca.gov.
Own this shop? Add photos
BAR field office: Hercules • Licensed since 2026