Price
Call for price
Hours
Open Mon–Sat
Station type
Test Only
Speedy Smog is a test-only smog check station at 402 Downey Avenue, Modesto, CA 95354. Open Mon–Sat.
Hours
- Monday
- 10 AM – 5:30 PM
- Tuesday
- 10 AM – 5:30 PM
- Wednesday
- 10 AM – 5:30 PM
- Thursday
- 10 AM – 5 PM
- Friday
- 10 AM – 5:30 PM
- Saturday
- 10:30 AM – 12:30 PM
- Sunday
- Closed
Hours from public business listings. Call to confirm before you go.
What to expect at Speedy Smog
Speedy Smog 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.
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?
- Speedy Smog doesn't do repairs, so the car goes to a repair shop and comes back for the retest.
- BAR's Consumer Assistance Program pays up to $1,450 toward emissions repairs for income-eligible owners.
Been to Speedy Smog?
Rate your smog check here. Your review helps the next driver choose.
402 Downey Avenue, Modesto, CA 95354
Get directions →Hours
- Monday
- 10 AM – 5:30 PM
- Tuesday
- 10 AM – 5:30 PM
- Wednesday
- 10 AM – 5:30 PM
- Thursday
- 10 AM – 5 PM
- Friday
- 10 AM – 5:30 PM
- Saturday
- 10:30 AM – 12:30 PM
- Sunday
- Closed
Hours from public business listings. Call to confirm before you go.
Other stations near Speedy Smog
The Smog Shop
125 Burney St
Midas Auto Center 1635
338 Mchenry Avenue
Precision Automotive
1203 Scenic Dr
Green Auto Repair
829 5th Street
Bobbys Smog
1515 Yosemite Blvd #b
Smoggy Smog Check
1729 Yosemite Blvd
Nearby cities in Stanislaus County
Questions about Speedy Smog
Speedy Smog is open Monday 10 AM to 5:30 PM; Tuesday 10 AM to 5:30 PM; Wednesday 10 AM to 5:30 PM; Thursday 10 AM to 5 PM; Friday 10 AM to 5:30 PM; Saturday 10:30 AM to 12:30 PM. Closed Sunday.
Verify this station’s license and STAR standing at bar.ca.gov.
Listing updated October 16, 2026.
Own this shop? Add photos
BAR field office: Fresno • Licensed since 2026