Joy Auto Center

This place is closed! The owner retired about a month ago! Use to come here all the time! Sad to see it close!

I’ve been servicing my 3 cars here for a couple of years now, and this place is a real gem. It’s just a mom and pop operation (both of them are super nice), as far as I can tell, and Jason holds down the fort alone (so you may want to call in ahead and see if he’s busy if you need a quick service like an oil change, or you may end up waiting a little bit. Of course you’ll need to leave it there for repairs). Jason is someone I would describe as a master mechanic, who has plied his craft for years and years. His knowledge is extensive, and his work is You can tell this by talking with him, seeing him work, and feeling how your car runs after he works on it. Great service and reasonable prices from a pleasant and honest, very knowledgeable mechanic. I’d trust him to take care of my car more than any dealer. If you want your car to be in tip-​top shape, and drive it for miles and miles, take it to Jason. He’s the best mechanic in the game.

Had a major service done to my Toyota Corolla a few days ago. Jason did an excellent job. Jason is so knowledgeable about automobile repair. My wife and I will definitely keep going back. One more thing. I find Jason such a honest and nice individual to converse with.

I’m very happy to have switched to Joy Auto.
Jason is patient and he explains part issues with you – this is good for folks who are not techs but nonetheless wanted to understand the problem like the techs do. I was fortunate to have had him explain how an idle air control valve unit breaks down while holding the defective IACV removed from my Sentra, one causing the periodic stalls. The prices are fair and Jason’s punctual.
My car drives great now.

I came here to get my brakes redone after it was jacked up by another repair shop. The owner is the mechanic and is a very stand up guy that comes across as very honest. He does NOT try to sell you anything other than what you are requesting. After 3 months of annoying brakes, they are finally all fixed. The price for brake pad installation (I brought in my own pads), rotor resurfacing, and installation was $ 95.
Pros:
honest
reasonable prices
does not try to sell you anything unnecessary
free wifi
Cons:
he is the only one working so wait time can be long. just call ahead and schedule it with him.

My brother in-​law recommended this place. My mother in-​law has taken her car here. Just moved into town and decided to take two of our cars here. We are so happy with the honesty and service. If you need your car services take it here.

Been coming here ever since I was a baby! The most reliable place and you can trust the guy here. They don’t over charge and they even have wifi!

im not from diamond bar but i drive all the way from Los Angeles because I trust this man. I recently came to get my car tuned up and he did a awesome job. I got my car back and it feels brand new! the steering wheel is soo much easier to control and my car drives soo smoothly…
This man is such an honest guy! He tells you everything he charges and why he charges it and further explains whatever is needed. Always using him to handle my car!

We have been to this shop since 98. Jason is the most honest technician we ever met. Came to his shop twice within 3 weeks recently cause my Infiniti brakes are making noises. After looking at them closely, he told me I can run for another 15 000 miles safely & Nissan/​Infiniti is famous for the brakes noises.
In addition, he reminded me that I can get the brakes light on & off problem fix at the dealer since it is still under warranty. What a nice guy!
I won’t hesitate to recommend him to anyone.

5 stars! He is soooo awesome. The owner will never lie to you. Been going to him for years. I should have wrote a review on him a long time ago, but started being lazy about this. Anyway, he is the most reliable mechanic I know. Way cheaper than going to the dealership. You should try him out once. He’s always super busy, but, if you want honesty and reasonable prices go to him!

My favorite go-​to mechanic is right here at joy auto. Love the customer service, the prices, and this place is honest which is very hard to come by these days!

One little old man here and I’m kind of just standing here waiting… Not fun.

Jason is hands down the most honest mechanic that I have ever found. I have recommended him to everyone in need of a good mechanic and everyone who took my advice has thanked me. You will not be disapointed with his service, prices or especially his character he is one of the good ones.

Very friendly service! They walked me step by step with what was wrong. Car is working great and they have fair cheap prices

Took my car in to get my brakes done. I received awesome service and a GREAT PRICE! I will definitely bring my car back.

I have to say that what everyone has said is true. The mechanic is a very honest guy. It’s really hard being a girl bringing in my car to any mechanic cuz I feel like they’re going to tell me a bunch of problems I don’t have. But he always tells me the truth. «You can go another *blank* miles before you do that.» «It is a problem, but you don’t need to fix it right away.» My mom used to go to church with him and always brought her car to him for that reason.
So I’ll quickly write about my recent experience with him. I was having car trouble where my ‘Check Engine’ light came on and my car would only go 20mph. This only happened when I drove over 30 minutes. A few mechanics gave me their opinion, and it was all the same after using the computer thingy to determine the error code and problem. «It’s your O2 sensor.» I can be intuitive sometimes, and I wanted it to be the O2 sensor since it isn’t that pricey to fix, but I had a feeling it wasn’t that. People would tell me other opinions but none of them sounded right, I can’t explain why. Since none seemed right and I didn’t want to waste money fixing something that didn’t need fixing, I decided to Joy Auto look at my car and risked being stranded in Diamond Bar since I live in Riverside (I had the car towed over there). I left it there for a few days and he noticed something no one else noticed. My engine was making a weird sound, not super noticeable, but if you REALLY paid attention you could hear it. He found out that something broke off which caused the O2 sensor to go blah, make the ‘Check Engine’ light come on, and made me only drive 20mph. (sorry for the inaccurate wording, I don’t remember the exact terms he used.) Basically, he fixed it and all is well. So thanks Joy Auto!

As a follow up to my last review for this place, I went back and they replaced my brake pads. They did it in a reasonable amount of time at, what I felt was, a very reasonable price and did not try and upsell me on anything. I’m due for an oil change now and will ask for a brake check once again because they are squeaking. Obviously I feel comfortable coming back here!

Based on the many favorable reviews here I decide to get a quote over the phone for an oil change. I explain that I want to use my own fully synthetic motor oil for my car. The man on the phone says, «No, sorry we don’t do that, «and adds «unless your car requires it, like Mercedes, we don’t do that.»
I have never been rejected by a mechanic. If you don’t believe me, call him yourself about synthetic oil.
Sorry I couldn’t give more stars but the mechanic doesn’t want to put synthetic oil in my car. That’s ridiculous. My car doesn’t require super unleaded, but I have the right to use it if I want. Hello… It’s my car. If I want to put Nitrogen in my tires instead of regular air… It’s my car!
Edit: I noticed my honest review was conveniently placed in the «Filtered» section. Apparently Unilocal doesn’t like 2 star ratings and placed it under the rug. I didn’t even know Unilocal had a filtered section. Makes you really think about what’s going on with honest reviews.

Yesterday, I dropped my car off at Firestone for a routine oil change that to my surprise, or perhaps not, I received a long list of items for repair – that’s how it goes, right! I knew that the battery needed replacing, which I readily accepted, but I couldn’t quite wrap my head around the brake package they were selling me for $ 700. Apparently, my brake pads are wearing at slightly different degrees and according to Firestone, the solution is to replace the calipers, pads, and rotors (on my not-​so-​old car that something like this is apparently highly unusual). This struck me as extremely odd, so I refused the offer and did a little shopping around this afternoon. I called a few places but felt most comfortable speaking with Jason from Joy Auto Center; during my conversation, I just knew that it would be a good place to take my car.
So I visited this afternoon and Jason took a few moments to look at my car up on the lift, and guess what? It turns out that my brakes are completely without issue and Jason estimates that I have another 20,000 miles to go before they need to be replaced. He explained that some of the bigger repair shops have different overhead costs and pretty much left it at that, allowing me to fill in the blanks. I noticed that there are a number of positive comments about Joy Auto Center being a trustworthy and honest place for auto repair, which today I can honestly say is the case. I sincerely appreciate Jason for giving me a complimentary inspection with an honest assessment. Not only did I save $ 700 today but I also found myself a good mechanic. I’ll be back for sure. As for Firestone, I suppose that their review is next on the list! :)

This place is miles away from me but I come here when my car needs fixing. He is very through and very good. I recommend him to all my friends and he always comes through for them in a pinch. Of course, this is a small auto center so big SUVs and trucks should probably go somewhere else for the actually fixing (he is made more for compact cars) but come here for a consult!!! He will tell you what you need or don’t need and, in the end, save you the big bucks and the trouble.
I drive a big car myself and he is very kind to take the time out and tell me what is wrong with my car. If he can fix it at his little shop then he will. So come here!!!
Come to this little mom and pop auto shop for all your auto needs! Well… minus the body things. Just come for the mechanical stuff. Ok? ^^