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Union Auto Service Center

4.0 (218 reviews)
Closed • 8:00 am - 5:00 pm

Services - Union Auto Service Center

Auto brake repair

Auto engine repair

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Recommended Reviews - Union Auto Service Center

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Bay Area
Mike G.

Came in for a smog test. Very polite and personable service. Very informative and helpful. I brought in my work car, a Toyota Prius Plug-in Hybrid. I recently received new License Plates which I totally forgot I needed to be on before the test. The guys were kind enough to lend me their screw driver so that I could put them on before my test. Inspection passed, photos were submit and all is good. $71. They may not be the most affordable in the area, but they're reliable, kind and honest. Granted, I've only come in for a Smog Test so I can't speak on any other repair or services. Certainly after this experience, I'm happy to know that if either of my cars has needs, I've got Union Auto as a place I can trust to assist.

giancarlo

0/10 I went to this shop and they said they couldn't plug it due to the plug " not holding" so I went to another shop and they said that UNION AUTO CENTER put a dummy plug and not a proper plug so it rendered the tire Unrepairable. I was stubborn so I then went to a 3rd shop across the street called Americas Tire and they said the same thing as the 2nd shop that Union auto center purposely damaged my tire by using a "dummy plug" rendering my tire unrepairable. Both shops said that if they used the proper plug it would have been fine and repairable but instead they wanted to damage my tire to sell me a tire and when I refused they got pissy and gave me attitude. PLEASE GO SOMEWHERE ELSE BEWARE!!

Mike T.

I have been coming here for the last three years. I love the way they take care of me and make sure that my car is taken care of. They are respectful and polite and don't try to hustle you or say something is wrong with your vehicle that is not even wrong. I went today told him that my check engine light was on and that it said I need coolant, when I went in they told me it was a sensor issue and everything was fine and I didn't even have to pay for anything. I definitely recommend for anybody that needs a oil change smog check or just a routine maintenance to go to this spot. I even got brand new wipers and was lucky enough to get a military discount.

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Reviews are generally positive. Many highlight the friendly and helpful staff, clear communication, fair pricing, and prompt service.

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great service . and scott is really nice . they make you feel at home . and after some time going there they know my name

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5 months ago

they like to use your car while your getting a oil change stepping on the gas like it's there car

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3 years ago

Thanks to Louie and staff for the quick service I walked in no appointment got brakes done back on the road On a Saturday. Will be back

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Review Highlights - Union Auto Service Center

“Thanks to Louie and staff for the quick service I walked in no appointment got brakes done back on the road On a Saturday.”

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Valvoline Instant Oil Change

Valvoline Instant Oil Change

(288 reviews)

All of the employees that work at this location on IMPERIAL highway and HARBOR boulevard are…read moreincredible! Great customer service. Amazing teamwork, they get you in and out. They don't try to upsell like crazy, but they tell you what you need. Every visit that I have at this location is consistent, and that's why I keep coming back. This time...Manny helped me with my Oil Change and I talked to a couple of the other employees while I was waiting and they are also kind and friendly here! There are oil change locations everywhere, but I'll drive by them to come here, because of the customer service and POSITIVE ATMOSPHERE any day!

First of all, expect upselling attempts, MANY…read more Second, after many times of paying an EXPENSIVE price for full synthetic oil which needs to be changed at the earliest 5k miles, I realized they were writing the mileage on the sticker to come back at 3k! ... The worker admitted to do that un purpose because they want you to come back at 3k miles so they can check your car "in case you have a leak" .... mind you, they wont tell you you still have mileage to go, and you are good, NOPE, they will automatically just do an oil change. My husband had to ask them to actually write the return mileage on the sticker at 5k NOT at 3k .... BE AWARE, specially if you are a female (dont be fool by the fact that they have a female worker) THEY WILL SCAM YOU. Not sure how many people are getting oil changes when in reality they didn't need it.

Fullerton Auto Repair Clinic & Body Shop - Brought in for seal replacements

Fullerton Auto Repair Clinic & Body Shop

(455 reviews)

I got a few quotes before deciding to bring my 2014 Prius Plug-in here, and I'm really glad I did…read more They weren't the cheapest and they weren't the most expensive, but I felt like they charged what they needed to in order to get the job done I had no idea they even worked on hybrids because I never saw that mentioned anywhere, and I think more people should know. They took the time to explain the repair, confirmed the diagnostic code, and even pointed out a few things I should do to help my Prius last longer. They noticed my hybrid battery cooling fan was missing after I told them I just had it "replaced" at another shop. That's the kind of information you don't usually get from a repair shop. They ended up not needing to drop the subframe, so they adjusted the labor instead of charging me for work they didn't have to do. It still took the amount of time they said it was going to take, but still discounted me a little bit which I thought was cool. I also had them do an oil change while it was there, and even that was less expensive than what I normally pay at places like Jiffy Lube or Valvoline. If you own a Prius or any hybrid, I'd definitely recommend checking them out. More than anything, I left feeling like they genuinely know these cars and took the time to educate me, not just fix it. I'll definitely be bringing my Prius back if I ever need anything else.

Idk, my experience was just ok. Lady at the desk & on the phone was nice. They didn't call me to…read moretell me they would need to keep my car overnight though, which was a bummer. I had to scramble to make alternate transportation plans.

Cook's Tire & Tune - We also service EV's tires, brakes, alignments and suspension!

Cook's Tire & Tune

(911 reviews)

Took care in for tire sensor in and out within 45 mins. Love this place. Everyone is kind and know…read moretheir stuff i highly recommend

I would NEVER recommend this shop…read more I brought my 2013 Honda Civic in because it was kicking back/hesitating while accelerating, even struggling to get onto the freeway. I paid a diagnostic fee because I wanted the problem diagnosed and repaired--not routine maintenance. The shop recommended a fuel system/injector cleaning and transmission fluid service, telling me that was the cause of my issue. I trusted their diagnosis and paid. The very next morning, my Check Emission System light came on. I returned, and they told me it was unrelated to the previous work, diagnosed a thermostat issue (P0128), and I paid for that repair too. After picking up my car the second time, the exact same acceleration problem was still happening, and while driving, the Check Emission System, Check VSA System, and Check Power Steering System warnings all came on. So after spending about $1,000 and making multiple trips back to the shop, the original problem I brought it in for still wasn't fixed. When I spoke with the manager, instead of trying to understand why I was frustrated, he became defensive, argumentative, and dismissive. He repeatedly said, "I don't understand why you're mad," asked, "Well, you said the issue was fixed, right?" (I NEVER said that), and when I explained I'd had to take multiple days off work and arrange transportation because I kept having to come back, he told me, "Having to take 3 days off is part of life. That happens when you have an older car that has issues." He also refused a refund, saying "We're not doing any work for free," and expected me to trust them with my car for a third time after they had already failed twice. Why would I pay them again when they couldn't fix the problem the first two times? I lost all confidence in the shop and took my car to an independent mechanic in Diamond Bar. He drove my car and noticed the drivability issue almost immediately. After spending several hours diagnosing and test-driving it, he found the actual problem: a faulty MAP sensor. He replaced it, and the hesitation is completely gone. He also told me the fuel system cleaning and transmission fluid service performed by Cook's were maintenance items and were not related to the problem I originally brought the car in for. I understand that diagnosing intermittent issues isn't always easy, but what I can't accept is paying around $1,000, making three trips back, being treated disrespectfully by the manager, and then having another mechanic correctly diagnose and fix the problem in a matter of hours. Save yourself the time, money, and frustration. I will never return or recommend this shop.

Union Auto Service Center - autorepair - Updated October 2026

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