Price
Call for price
Hours
Open Mon–Fri
Station type
Test & Repair
Smog Masters is a STAR certified test-and-repair smog check station at 443 South 9th St, Modesto, CA 95351. Open Mon–Fri, 8 AM–5 PM.
Hours
- Monday
- 8 AM – 5 PM
- Tuesday
- 8 AM – 5 PM
- Wednesday
- 8 AM – 5 PM
- Thursday
- 8 AM – 5 PM
- Friday
- 8 AM – 5 PM
- Saturday
- Closed
- Sunday
- Closed
Hours from public business listings. Call to confirm before you go.
What to expect at Smog Masters
Smog Masters 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.
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 Masters can diagnose and repair the problem in the same shop, then retest the car.
- BAR's Consumer Assistance Program pays up to $1,450 toward emissions repairs for income-eligible owners.
Been to Smog Masters?
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443 South 9th St, Modesto, CA 95351
Get directions →Hours
- Monday
- 8 AM – 5 PM
- Tuesday
- 8 AM – 5 PM
- Wednesday
- 8 AM – 5 PM
- Thursday
- 8 AM – 5 PM
- Friday
- 8 AM – 5 PM
- Saturday
- Closed
- Sunday
- Closed
Hours from public business listings. Call to confirm before you go.
Also listed on
Other stations near Smog Masters
Sam's Complete Auto
819 S 9th St Ste C
The Smog Shop
125 Burney St
Green Auto Repair
829 5th Street
Bobbys Smog
1515 Yosemite Blvd #b
A-1 Tony Hernandez Smog
431 West Hatch Rd
Speedy Smog
402 Downey Avenue
Nearby cities in Stanislaus County
Questions about Smog Masters
Smog Masters is open Monday 8 AM to 5 PM; Tuesday 8 AM to 5 PM; Wednesday 8 AM to 5 PM; Thursday 8 AM to 5 PM; Friday 8 AM to 5 PM. Closed Saturday and Sunday.
Verify this station’s license and STAR standing at bar.ca.gov.
Listing updated October 4, 2026.
Own this shop? Add photos
BAR field office: Fresno • Licensed since 2013