Price
Call for price
Hours
Open Mon–Sat
Station type
Test Only
Appointments
Walk-ins welcome
Hours
- Monday
- 9 AM – 5 PM
- Tuesday
- 9 AM – 5 PM
- Wednesday
- 9 AM – 5 PM
- Thursday
- 9 AM – 5 PM
- Friday
- 9 AM – 5 PM
- Saturday
- 9 AM – 2 PM
- Sunday
- Closed
Good to know
Languages
English
Payment
Cash, Credit Card
What to expect at Ontario Smog
Ontario Smog is licensed by the Bureau of Automotive Repair as a Test Only smog station in Ontario. 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?
- Ontario Smog 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.
152 N Mountain Ave, Ontario, CA 91762
Get directions →Hours
- Monday
- 9 AM – 5 PM
- Tuesday
- 9 AM – 5 PM
- Wednesday
- 9 AM – 5 PM
- Thursday
- 9 AM – 5 PM
- Friday
- 9 AM – 5 PM
- Saturday
- 9 AM – 2 PM
- Sunday
- Closed
Also listed on
Other stations near Ontario Smog
Manny's Smog
129 N Mountain Ave
Wayne's Automotive
157 N Mountain Avenue
Savon Smog Plus
1125 W Holt Blvd
Avid Smog
1409 West Holt Boulevard
Hector's Smog Check
939 W State St # E
Nearby cities in San Bernardino County
Questions about Ontario Smog
Ontario Smog is open Monday 9 AM to 5 PM; Tuesday 9 AM to 5 PM; Wednesday 9 AM to 5 PM; Thursday 9 AM to 5 PM; Friday 9 AM to 5 PM; Saturday 9 AM to 2 PM. Closed Sunday. Hours can change on holidays, so call ahead if you are cutting it close.
Ontario Smog accepts Cash, Credit Card.
Ontario Smog has held a BAR smog license since 2023. You can verify the license status at bar.ca.gov.
Ontario Smog 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 (909) 986-6655 for a quote.
Ontario Smog does not take online bookings here, but walk-ins are welcome. Call (909) 986-6655 to check the wait.
Staff at Ontario Smog speak English.
The closest alternatives in Ontario are Manny's Smog and Wayne's Automotive. 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: Riverside • Licensed since 2023