Price
Call for price
Hours
Open Mon–Sat
Station type
Test & Repair
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 – 5:30 PM
- Saturday
- 9 AM – 3:30 PM
- Sunday
- Closed
Good to know
Languages
English
Payment
Cash, Credit Card
What to expect at Smog Dynamics
Smog Dynamics is licensed by the Bureau of Automotive Repair as a Test & Repair smog station in Modesto, 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?
- Smog Dynamics 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.
830 Kansas Ave C3, Modesto, CA 95351
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 – 5:30 PM
- Saturday
- 9 AM – 3:30 PM
- Sunday
- Closed
Also listed on
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Kruse Lucas Imports
525 Tully Rd
Performance Smog
1404 Carpenter Road Suite A
Green Auto Repair
829 5th Street
Stanislaus Smog & Repair
1400 North 9th Street
Midas Auto Center 1635
338 Mchenry Avenue
Nearby cities in Stanislaus County
Questions about Smog Dynamics
Smog Dynamics 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 5:30 PM; Saturday 9 AM to 3:30 PM. Closed Sunday. Hours can change on holidays, so call ahead if you are cutting it close.
Smog Dynamics accepts Cash, Credit Card.
Smog Dynamics has held a BAR smog license since 2012. You can verify the license status at bar.ca.gov.
Smog Dynamics 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 (209) 529-1975 for a quote.
Smog Dynamics does not take online bookings here, but walk-ins are welcome. Call (209) 529-1975 to check the wait.
Staff at Smog Dynamics speak English.
The closest alternatives in Modesto are Kruse Lucas Imports (0.6 mi) and Performance Smog (0.9 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: Fresno • Licensed since 2012