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Auto Squad Repair
- Efficiency
- Price
- Hands
“Even with exotic European car brands which other repair shop refuse to fix, he is very patient and tries to do research first before making any judgements!”
Best Car Inspection & Emissions Testing near Diamond Bar, CA
We have 2 stations in Diamond Bar on file, and both are on this list, along with 22 from towns including Corona (5, 17 mi), Upland (3, 12 mi) and Rancho Cucamonga (3, 17 mi).
18 open weekends · 22 rated 4.5+ · 5 show a license
Data verified October 16, 2026
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Diamond Bar Auto Service & Body
“The mechanic had a nose around under the hood and under the chassis, showed me the problem, reassured me that i could manage it until i got home to my regular shop, and declined any payment for his time.”
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J & L Car Care
- Quality
- Price
- Diagnosed
“As a single woman I can get weary when dealing with car issues and such, but this crew has never wavered from providing me excellent service, with a smile and sometimes a donut and coffee.”
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Reliable Smog Saint Anthony Complete Auto Care
“Helpful and very friendly workers and from the name of the business it speaks clearly their the best The word trust keeping me stay with this shop and proud recommending to my friends and family.”
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Foothill Quicky Smog
- Sunday
- Price
- Efficient
“My 2015 Malibu needed it's 1st test but I had a check engine light, so he didn't waste my time or try to smog it, explained what I had to do, then after I fixed the problem and went back, it failed again because the code had not cycled out, so he gav...”
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Master Smog & Test Only
- Truck
- Price
- Diesel
“Received paperwork pertaining to the Smog check that had a little more in-depth information on it than where I would go in the past, not sure if its a new thing the DMV is doing or if its just this place but it was awesome to have for my records.”
Listed for drivers in and around Diamond Bar, CA, these 24 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: Diamond Bar, CA
The 24 stations on this page are rated from 4.0 to 5.0 across 5,042 reviews; 23 have 50 or more reviews and 22 are rated 4.5 or higher. When customers rate these stations on specific qualities, they most often praise professionalism (97%), value (81%) and punctuality (72%). The topics that come up most in reviews of the stations on this page are "diagnosis", "fair" and "communication". 18 are open on Saturdays and 1 on Sundays. 5 show a license on their websites; 2 list staff certifications (ASE) and 17 have a BBB rating of A or A+. 20 have ten or more years of experience, the longest 64 years. 2 offer financing; 2 give free estimates; 9 are family- or locally-owned and 11 list coupons or special offers. 1 has Spanish-speaking staff. We have a website on file for 22 of the stations on this page; 17 publish a contact page; 10 list a public email and 4 take bookings online. We count these figures across the stations on this page; distances are straight-line, and hours and prices change, so confirm the details with the station before you visit.
Can I use a station outside Diamond Bar?
Inside your own state, yes. 2 of the 24 shops here are in Diamond Bar and the rest come from other towns. Crossing a state line does not work, because the test has to be accepted by the state that registers the car.
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Rancho Transmissions and Automotive
- Work
- Price
- Diagnosed
“My transmission slipped out of gear The owner is really honest and a good person He could have easily charged me 1000-2400 to fix my car It just needed a replacement part in order to keep it in gear He only charged me 180 dollars and had it d...”
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Precision Import Auto Repair
“It's rare to find a mechanic shop where you feel genuinely cared for, but Precision Import Auto Repair excels in both quality service and customer care.”
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Smog N Save
“Nobody likes him to take the car in to get smog it's almost as bad as waiting in line at the DOL but when you find somebody that makes the experience pleasurable who knows what he's doing and cares about his customers this is where you go you come to...”
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Pomona Gear
- Pinion
- Truck
- Job
“If you don't know how to properly build differentials with the patience and proper tools, I highly recommend that you don't touch it AT ALL and bring it to a specialists that knows what they're looking at like Pomona Gears.”
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Harvey's Autotech
“Were honest and even though nothing ended up needing to be done to my vehicle (hence the honesty) they gave me a ride to and from my home to their shop to drop off and pick up my vehicle and gave me the peace of mind I needed.”
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Green Smog Check
“It's a little tough to find the complex, you have to drive through the back of the car wash or on the other side is a car dealership I drover through their service center driveway to get to the building.”
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VMS Auto Body Collision Center
- Text
- Team
- Calls
“I've worked with this shop for 3 or 4 times and the consistency of their work has always remained at high quality standards with great attention to detail.”
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Karta Motorwerks
- Dealership
- Prices
- Communication
“I was indeed scared in my situation having my windows down and not knowing why the key wouldn't start the car to lift my windows up again, but Atrack was able to lift my spirits in a few words, “did you turn your wheel while the key is in the ignitio...”
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小李修車廠 KB Motor
- Fault
- Tire
- Efficient
“My car dropped to KB Motor for repair the left back side cover shell, they kept the car there for over a month and kept telling us the car will be fixed in the following week, but every week when we called, they kept pushing the dates to the next wee...”
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Rancho Smog Center
“As a bonus, he and another gentleman were able to identify a noise I had been hearing for 5 years but no one else addressed-and they were able to fix it with an easy solution.”
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Al & Lee's Auto Care Center
“I love bringing my car here and I've been going since my dad has recommended it and he's been going since I was young, the prices are very reasonable especially with all the work that they have to do and they are very knowledgeable about what the pro...”
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R & N Complete Auto Repair
- Work
- Prices
- Know
“They replaced my headlight on my prius and i was scared coming to a mechanic because im a woman i dont want to be overcharged they gave me a right price and the even crimped the wire i really appreciated it and will be coming back again !”
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North El Monte Automotive
- Price
- Door
- Mechanic
“Fixed my passenger side mirror with very low price two months ago.”
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Connie & Dick's Auto Service Center Inc.
- Truck
- Prices
- Fair
“Outstanding customer service, they walked me through procedures and were very thorough when explaining what needed to be done making sure I understood what exactly I was responsible for or the warranty company could be responsible for.”
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Low Price Smog Check
- Money
- Reviews
- Prices
“Other comments that I see are unsubstantiated comments, I say this because I have been in that place for 14 years and there are scenarios that never happened, I want to think that it is the competition”
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Corona Express Smog
- Website
- Price
- Morning
“I had a problem with one of my vehicles, not only did they show us how to resolve the problem, they helped us with the first steps which are tedious, what would've been a $1200 repair ended up costing us 2 days of our time and $8.”
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Quality Car Care
- Drive
- Mechanic
- Check Engine Light
“First of all I like to start out by stating that it is very neat clean and the owner JACK is very professional and very helpful and understanding to my needs great job.”
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B & D Automotive
“Honest mechanics, my family has been bringing vehicles here for over a decade”
Why these companies made our list
What customers say about stations near Diamond Bar
- “This is only place I trust to send my car over if it needs to be fixed or maintained!” — customer of Auto Squad Repair
- “Reliable was professional fast and very reasonable. I will take all my cars there for smog and repairs.” — customer of Reliable Smog Saint Anthony Complete Auto Care
- “Fast, easy, and fairly priced. Not much more you could ask from a smog place.” — customer of Green Smog Check
- “Fast and very friendly. Take all my cars here for their smog checks.” — customer of Foothill Quicky Smog
- “Chris did a great job. Really fast and easy to work with.” — customer of Corona Express Smog
Excerpts from public reviews of the stations listed on this page.
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