These guys are good, they know what they are doing. The diagnosed thr probkem, were upfront about rates and what needs to be done. They did a great job in replacing the ball bearings on the front side passenger wheel which was causing a lot of noise and friction. Their rates were very reasonable. read more

I would give J & J Auto on Whipple in Union City a 5 Star X 10! Juan is professional & keeps his customers updated & informed. I have an extended warranty on my 2014 Nissan Murano. I took my car to Juan for analysis on my transmission. I had read online that some of the Nissan Muranos have had CVD transmission issues. I make sure I have all preventative maintenance on my car. I left my car for Juan to take it for a test drive expecting the usual diagnostic tool but instead he left with a TouchPad device. The TouchPad device detected issues & showed the error codes with my transmission. Juan updated me that the transmission would need to be replaced with a transmission from Nissan dealer. Juan then called the extended warranty company, faxed them the computer diagnostic findings & had everything authorized in record time. There was a 2 - 3 week back order on the transmission, I took the car back home & as soon as the transmission came in Juan called me to bring the car in. Juan explained the process & timeline which he met as discussed. Juan had me bring my car back in a week later to check everything. I am happy to say that my car drives like when I bought her & I am so relieved that I found Juan at J & J Auto in Union City! Juan is an excellent mechanic & his diagnostic tool is superior to any device I have seen! I highly recommend Juan & will continue to take my car to him for excellent Customer Service & mechanical expertise! read more

I went to Javier for years, trusted him and even recommended his business to friends and family. So, when I was getting ready to move out of state, I asked him to fix everything for a safe trip...He offered to give me a discount for a "favor," and was instantly offended. When he noticed that I didn't take his gesture well, he "fixed" everything in record time so I wouldn't say anything....well, a few months after I moved, I had to take my car to the mechanic because my heater and air conditioner stopped working and realized that he not only didn't do anything I asked him to do, but parts and screws were missing all over my engine. I ended up having to pay for over $1,000 worth of repairs because I went years without proper care. I could not believe how much he deceived me and jeopardized my life. Do not trust this business! read more

Been going to Javier & team for a couple years now , by now they have worked on 2 of my vehicles (currently working on my main one) and every time I go and talk to Javier/ team they always go above and beyond to help EVERY customer with the best possible option/ THEY ALWAYS TELL YOU THE TRUTH. Times are tough, and there are few rare ones left, but these are the GO TO GUYS for practically any car issue, mind you, at an AFFORDABLE cost. Always a great time. Hit them up! read more

Juan is a very nice guy. Great quick service ! My pops been going to him since he opened up and will be passed many generations down! Highly recommend!! read more

Used to be my favorite place and recommended highly, but got expensive repairs done here including replacement of the gasket and 6 month later it's back to oil leaks again. My brakes and roters were also replaced and was told at my 4 month oil change that my brakes needed to be replaced soon. What? Thought they were just replaced?? Do not drive often or long distances so this did not make sense. I am female so not sure if this has something to do with the responses I was getting. Done coming here, trusted the owner very much and recommended to others but am thinking parts used were cheap and I was not being told the truth at each visit. No longer recommend. read more

I cannot stress enough what horrible service we got from this so called auto shop. DO NOT GO HERE! They will rip you off, take your money and leave you with the same problem you started with. Then they will not guarantee their own work!!! Not to mention the horrible customer service, they yell at their customers and simply don't know the meaning of CUSTOMER SERVICE. J&J Auto Service will rip you off, please don't trust them, save your money and the headache. If I could, I would give them 5 NEGATIVE star ratings, unfortunately...and BELIEVE me that it hurts to even give them 1 star. J&J Auto Service is unprofessional, incompetent and a total complete rip off! read more

Very professional and caring shop, I recommend the shop to everyone. Personnel is very professional. Their workmanship is top notch.

These guys are awesome, my family has used them for years. Very honest, trustworthy, and fair prices. Highly recommend!

Friendly, Honest, & Reasonably priced service. My boyfriend and his family referred me here they have been coming here for years... I came in for an oil change and diagnostic service. He recently had an issue with his 2005 Kia Sorrento, J&J were closed on a Sunday so he tried going to a gas station service where they tried to say just by looking in the hood it was his belt (it sounded like belt) and eng??! He waited the following business day and Juan said it was the belt only nothing wrong with engine!! Saved him money and stress he decided to also get his smog done... Happy customers left. I recommend this place for your auto service needs. :) read more

Horrible service, they are sneaky and try to rip you off with just about anything. Went in and guy failed me on purpose and tried to get more money out of me. Avoid Juan Melgoza at all costs read more

Question: How do you screw up a smog check on a Honda? Answer: Go to the idiots at J&J. Lesson 1: you don't accuse your customers of doing something illegal and shove a VOID carbon copy in their face, then walk away feeling proud. Let me tell you why: Some customers know much more than you do about your profession. Let me explain to you some basics: Car manufacturers place numbers and letters on their parts. These letters and numbers have meaning. When you own an automotive establishment you should invest in small reams of paper that contain itemized and highly organized instructions on the construction of vehicles called: Service Manuals. Or if you don't want to invest in owning the manuals for the cars you service you could also try using something called a computer. On many computers is something called the internet. It will help you learn things. I have taken the time to provide for you a demonstration: http://lmgtfy.com/?q=what+does+a+P75+head+come+from+ In short: bolt holes do not identify an engine. Especially one that was produced for over 20 years in over 20 countries in over 2 million cars. Sincerely, A customer that knows more than you do about your profession. To those that read all this thank you. Do not take your vehicle here. You'd be better off buying some sockets at harbor freight and learning how your car works yourself. read more

they are very friendly, honest diagnostic from Juan and ask fair prices for their services and parts. Always looking for your safety first. read more

They are a great shop for big or small jobs. They did a full engine and transmission swap to my truck and I have had no issues with it. I would recommend them to anybody looking for an honest machine. read more

Fucking place sucks I took my car like 4 months ago and paid for service $980 to pass smog and they still working on car am about so sue that guy but dont really know what is the 1st step to sue a guy read more

Juan and his team are excellent! They have been our family mechanics for many years. My family and I trust them with all of our vehicles because they are professional, honest, and they are affordable. My father in law trusts J & J Auto with his commercial vehicles as well. I give these guys 5 stars, if I could give them 10 stars I would! Great guys! read more

J & J Auto has always gone above and beyond for our family's. Very honest fair and reliable. I would recommend this shop to everyone. Other reviews are not true and just plain crazy. read more

I went there for a smog. The car passed but there. Was a hose that had a small hole in it. So they said the car did not pass. I called. My mecanic and he asked why. The guy at j and j told him so I took it back to get it fixed. J&j made me pay for the failed text and when income back I would have to pay again! My macanic said that. They. Should. Have a"no pay if u do not pass. He. Said most. Pleases do. So instead. Of a the $30 special I will have to pay twice as much. read more

Three years ago I want there to change brakes and brake rotas, was told that it was done. Paid for the job. And just found out from honest mechanic that brake rotas were never changed, and there were half of minimum safe thickens. So it was dangerous to drive..anytime the rotas would crack and I would have no working brakes. If you value your life, time, and money, do not go to J and J auto. read more

Don't go to this shop, they are professional, "professional liars". they will just mess-up your automobile. They will give you 1 year warranty on parts and service, they will let you know what parts are needed to be replaced and give you a price quote and pay them, but they will not replaced all of the parts that you paid for. Their warranty is a joke. This shop an example of dishonest service. read more