Price
Call for price
Hours
Open 7 days a week
Station type
Test & Repair
Appointments
Walk-ins welcome
Hours
- Monday
- 9:30 AM – 7 PM
- Tuesday
- 9:30 AM – 7 PM
- Wednesday
- 9:30 AM – 7 PM
- Thursday
- 9:30 AM – 7 PM
- Friday
- 9:30 AM – 7 PM
- Saturday
- 9:30 AM – 5 PM
- Sunday
- 11 AM – 3 PM
Good to know
Languages
English
Payment
Cash, Credit Card
What to expect at Cartech
Cartech is licensed by the Bureau of Automotive Repair as a Test & Repair smog station in Lafayette, so it can run the inspection and, if your car fails, diagnose and fix it in the same shop. It is STAR certified, so it can test vehicles the DMV directs to a STAR station, including gross polluters.
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?
- Cartech can diagnose and repair the problem in the same shop, then retest the car.
- 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.
3356 Mount Diablo Blvd, Lafayette, CA 94549
Get directions →Hours
- Monday
- 9:30 AM – 7 PM
- Tuesday
- 9:30 AM – 7 PM
- Wednesday
- 9:30 AM – 7 PM
- Thursday
- 9:30 AM – 7 PM
- Friday
- 9:30 AM – 7 PM
- Saturday
- 9:30 AM – 5 PM
- Sunday
- 11 AM – 3 PM
Also listed on
Other stations near Cartech
Nearby cities in Contra Costa County
Questions about Cartech
Cartech is open Monday 9:30 AM to 7 PM; Tuesday 9:30 AM to 7 PM; Wednesday 9:30 AM to 7 PM; Thursday 9:30 AM to 7 PM; Friday 9:30 AM to 7 PM; Saturday 9:30 AM to 5 PM; Sunday 11 AM to 3 PM. Hours can change on holidays, so call ahead if you are cutting it close.
Cartech accepts Cash, Credit Card.
Cartech has held a BAR smog license since 2015. You can verify the license status at bar.ca.gov.
Cartech 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) 385-7116 for a quote.
Cartech does not take online bookings here, but walk-ins are welcome. Call (925) 385-7116 to check the wait.
Staff at Cartech speak English.
The closest alternative in Lafayette is California Smog (0.6 mi). It is listed further up this page with its rating 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 2015