Price
Call for price
Hours
Open 7 days a week
Station type
Test Only
Appointments
Walk-ins welcome
Hours
- Monday
- 8:30 AM – 5:30 PM
- Tuesday
- 8:30 AM – 5:30 PM
- Wednesday
- 8:30 AM – 5:30 PM
- Thursday
- 8:30 AM – 5:30 PM
- Friday
- 8:30 AM – 5 PM
- Saturday
- 9 AM – 4 PM
- Sunday
- 10 AM – 3 PM
Good to know
Languages
English
Payment
Cash, Credit Card
What to expect at Smog Star Express
Smog Star Express is licensed by the Bureau of Automotive Repair as a Test Only smog station in Walnut Creek. It runs the inspection and issues the certificate but does no repairs. 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?
- Smog Star Express 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.
1611 Newell Avenue, Walnut Creek, CA 94596
Get directions →Hours
- Monday
- 8:30 AM – 5:30 PM
- Tuesday
- 8:30 AM – 5:30 PM
- Wednesday
- 8:30 AM – 5:30 PM
- Thursday
- 8:30 AM – 5:30 PM
- Friday
- 8:30 AM – 5 PM
- Saturday
- 9 AM – 4 PM
- Sunday
- 10 AM – 3 PM
Other stations near Smog Star Express
N Service Auto Repair & Service
1145 Bont Lane
Walnut Creek Honda
1707 North Main Street
Walnut Creek Ford
1800 N Main St
Lithia Pre-Owned Center Of Walnut Creek
1840 N Main St
Toyota Walnut Creek
2100 North Broadway
Nearby cities in Contra Costa County
Questions about Smog Star Express
Smog Star Express is open Monday 8:30 AM to 5:30 PM; Tuesday 8:30 AM to 5:30 PM; Wednesday 8:30 AM to 5:30 PM; Thursday 8:30 AM to 5:30 PM; Friday 8:30 AM to 5 PM; Saturday 9 AM to 4 PM; Sunday 10 AM to 3 PM. Hours can change on holidays, so call ahead if you are cutting it close.
Smog Star Express accepts Cash, Credit Card.
Smog Star Express has held a BAR smog license since 2026. 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) 938-3315 for a quote.
Smog Star Express does not take online bookings here, but walk-ins are welcome. Call (925) 938-3315 to check the wait.
Staff at Smog Star Express speak English.
The closest alternatives in Walnut Creek are N Service Auto Repair & Service (0.5 mi) and Walnut Creek Honda (0.7 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