Mobile Mechanic Pros Ontario
“Was in a tough bind and they helped me get through it!”
Best Car Inspection & Emissions Testing in Ontario, CA
23 stations listed · all 23 in Ontario · 1 open 24/7 · 21 open weekends · 20 rated 4.5+
Data verified November 12, 2026
Low Price Smog Check
“Quick service guy is a bit quiet but gets the job done at a good price.”
Wayne's Automotive
“I've been coming here for years and i'm always satisfied with the service.”
C & C Automotive
“Best mechanic in Ontario always gets it done on time and I they always leave my car clean highly recommend coming here”
DT Hondamotive and Transmission
“Highly recommend for all your Honda services and will definitely be back.”
Ontario Smog
“Went today on my lunch hour for the 2nd time and was in and out in less than 15 minutes.”
Listed for drivers in and around Ontario, CA, these 23 shops carry out emissions and inspection work. What each one says about its station license, hours and retest policy comes from its own website; ratings and quotes come from public reviews.
Area overview: Ontario, CA
All 23 stations we list here are in Ontario itself. We have 35 stations in Ontario on file; this page shows the highest-rated 23. The stations on this page are rated from 4.1 to 4.9 across 2,059 reviews; 15 have 50 or more reviews and 20 are rated 4.5 or higher. The topics that come up most in reviews of the stations on this page are "price" and "fair". 1 is open around the clock; 21 are open on Saturdays and 2 on Sundays. 1 shows a license on its website; 1 lists staff certifications (ASE) and 10 have a BBB rating of A or A+. 12 have ten or more years of experience, the longest 46 years. 1 offers emergency or roadside call-outs and 3 list coupons or special offers. We have a website on file for 13 of the stations on this page; 6 publish a contact page and 3 take bookings online. We count these figures across the stations on this page; hours and prices change, so confirm the details with the station before you visit.
Can I book a test online with shops listed for Ontario?
3 of the 23 shops here take bookings online. Some stations work on a queue instead, which is fine early in the month and painful at the end of it. If you can book, take the first slot of the day and you will be out before the line forms.
Pro Smog Center
“The front desk clerk is always a delight and looks for ways she can get me what I need.”
Tap Automotive
“They have great customer service and great Automotive technicians working in the shop”
S & E Smog Check & OIL Change
“He was an honest man, straight to the point and hearing him talk with other customers just reinforced that he's actually there to help.”
Menas Brake & Suspension
“I have been a client at this shop for over 20 Years the are reliable and trustworthy, I have recommended this place to friends and family and they are real happy with the services and affordable prices !!”
DNV Smog & Carb Clean Truck Check
“After finishing business with prior customer took me in with no delay and honored coupon on the spot.”
Ontario Smog Check
“Very good service I recommend the best of Ontario, Montclair, Chinese, Pomona excellent”
Savon Smog Plus
“Fast and easy… Price is very reasonable… They treat you like a king”
MuÑoz Auto Repair
“Highly recommended, I took my car to have the brakes worked on and I was very satisfied.”
TC Tires
“I like that place for my tires the people from there are so nice”
Leininger & Short
“They don't try to upsell you into spending more then you can afford.”
Tune-Ups Inc
“Helped me out of a tough situation..”
Motorinn Genuine Auto Care LLC
“I had an electrical issue that no one could fix, these guys found and fixed the problem.”
T & T Smog Test Only
“Excellent service i go here everytime i need a smog the man is so friendly doesn't talk much but gets the job done”
Baja Auto Center Smog & Lamp
“I love everything about it I'm always happy when I leave Tony is a great mechanic and I don't feel like I ever overpay for anything I give them five stars”
J and C Auto Repair
“They always know what is wrong with my car and fix it so it's better than before!”
Ontario Japan Auto
“Victor is the nicest person you'll ever meet.”
Ontario Auto Repair
“I dealt with other repair shops but l will strictly go here for my repair work”
Why these companies made our list
What customers say about stations in Ontario
- “Had my smog done today, they were extremely professional and friendly and the process was very quick, I would recommend them to anyone.” — customer of Pro Smog Center
- “What really stood out was that a knowledgeable and professional woman handled the entire smog service on my car.” — customer of Savon Smog Plus
- “Awesome smog shop guys are very kind,courteous and helpful very knowledgeable they really know what they're doing.” — customer of Ontario Smog
- “I've been coming to this location to get STAR certified smog tests done here for the last couple of years and have had positive experiences every time.” — customer of DNV Smog & Carb Clean Truck Check
- “Exceptional service and very professional. Will bring every other car that needs a smog right here!” — customer of Savon Smog Plus
Excerpts from public reviews of the stations listed on this page.
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