Gumaro’s Auto Repair & Mufflers

This place can’t read aftermarket parts correctly. If you need to pass smog go elsewhere, I failed here because they said the EO numbers on my parts were not right for my vehicle. As soon as I left I went and got the same test done at another star smog location and passed with flying colors.

Excellent service done here. Highly recommend to all friends and family. Mechanics here are knowledgeable and friendly people and very fast also.

It looks like a dive, but every time we have had service performed they have delivered as-​quoted and in the time promised. Everything from having them pin a window in place that the automatic opener kept breaking on when replaced by the dealership to 60k service. Don’t expect the fanciest of waiting rooms, but their quotes are accurate, inexpensive and they deliver on-​time. I can’t ask for much more from a budget auto repair shop.

Gumaro’s never fails to disappoint, fast, friendly service at a good price, old fashioned value is the best way to describe this place.

This is the WORST auto repair shop I’ve ever been to. Seriously, they must have their friends review them on Unilocal because I can’t begin to imagine how they could possibly have four stars. I wish I could give them a negative star rating my experience was so bad. I have infant twins and needed to get my car checked out before a big road trip and so called this place for an estimate and appointment. They told me that they don’t do appointments so to just come in. With their proximity to Costco I thought I couldn’t go wrong, even if I had to wait a bit.
The man behind the counter was exceedingly rude and wouldn’t even look up from texting on his cell phone to take my keys and information while my restless babies waited for him to finish up on his iphone. So unprofessional. I figured friendliness isn’t a requirement to being a good mechanic so I shrugged it off and headed to Costco for some big box shopping, ie diapers and formula. About two hours later I returned to find they had charged me $ 100 and had not done any work but claimed my car needed $ 500+ in repairs that they were of course happy to complete any time. One of the repairs they claimed I need was a brake job but I had just had them done about 6 months ago so something seemed very fishy. I also drove in with two working turn signals and somehow one of them was no longer working and they were more than happy to charge me to fix it.
I decided not to spend another dime as I just got an all over icky feeling from this place. A-​1 shysters all the way — happy to rip me off and be completely unethical in order to get a few extra hundred dollars at the end of the day.
Well, I took my car to another mechanic the next day and he got the turn signal working for free in less than a few minutes and confirmed the car didn’t need anything — including brakes for at least another 5 — 10K miles.

I had a great experience with gumaros. I had a bad experience at another shop and brought my car here for a second opinion. Gumaros had the car for half of the day, fixed the issue and smogged the car for me ! They are fast, knowledgable and honest. I will definatly bring my car to this shop again whenever it is needed. Dont settle for anywhere else, these guys are top notch quality! Made me feel like i was in walnut creek!

This company is definitely shade. I had a car that was in need of a smog and had a feeling that it wasn’t going to pass. I looked on the Bureau of Automotive Repair website for a shop that participates in the CAP program, which helps pays for smog repairs. That way I wouldn’t have to pay twice for a smog by using the free retest after they did the work.
I found this shop based off the limited selection on the website. I went in and asked them about the program. A day later I went in for the smog and sure enough it failed. It took a few weeks to get a response from the CAP Program and when I received the acceptance letter I called to set the appointment for repairs. That is when I was told that they are not participating in the program for the next 60 days.
I then had to find another shop to have the work done. Because I couldn’t do the free retest that I had paid for at Gumaro’s shop, I had to pay for another smog with the shop that did the repairs. So yeah, basically I lost $ 40 because this shop lied about their participation in the CAP program.

Needed a place to get my headlights replaced but didn’t want to have to take my car to the dealership because it’s an import and no one wanted to let me use lights that I had purchased myself… the kind lady @ O’riely recommended Gumaros
Called at 8 am to get my headlights replaced
Was quoted a price and dropped off the car at 8:15
Car was ready by 8:45
Picked it up and paid the price I was told (unlike other mechanics who always manage to find a reason to try to get you to pay more)
NO BS JUST GOOD SERVICE
from a family business… def recommend them. thanks guys for the fast great service

BAd first, second and third experience At the shop we brought our car for a smog that guy was very unfriendly just put his gadget in the muffler turned it on it didn’t pass he stopped said no good, we took the car to repair brought it back a second and third time and same thing not Friendly or no advice as to what might be wrong to attempt to even talk to us .will not bring Our cars to his shop no stars for this business:(

The muffler went out on my wife’s car and we were here in Antioch visiting her parents. Did a Unilocal search for a muffler repair shop and found Gumaro’s. So decided to check them out to get the muffler fixed. When we got there we were helped right away and told what was wrong with the car. Left it with them and they got to working. We were quoted a good price and they replaced the muffler. Great customer service! I really recommend Gumaro’s.

Customer Service – The guy was very friendly. Seemed to know what he was doing. He was handling customer service and my smog check at the same time!
Speed – Very quick. Was in and out within 15min. Didn’t have to wait when I came in at 11am in a Sat.
Cost – And very affordable! $ 24.99 + cert fee etc. Total out the door = $ 36!!! I’ll def. come back!

Very nice and friendly I will be going back for my car needs!!!

I went here with my Hyundai on a Saturday because the dealership was closed. They found the problem within the timeframe promised. They also called me the next Monday with the part info, just like they said they would. When I went in they installed the part immediately. All charges were the prices they had quoted me. Very professional and fair service.

IF there was lower then one star i would give it. This is the worst place ever, be warned. I spend thousands in repairs for my Classic, which would not even start after major repairs. When it did start it turned off on me half way down the street, only for them to tell me i need a new engine? Water was pouring all out the engine everywhere. And they still made me pay for the reparis. This place is only good for mufflers, be warned. I didn’t even go back after they put my new engine and it was under warranty, it was still leaking oil everywhere? A new engine leaking? After almost $ 6 grand in repairs? This is the last place on earth to go to.

I REALLY wanted this to be a good review. But unfortunately I cannot say it will be. I’ve had issues with my car for a few weeks now. Its spontaneous and does not occur all the time. I’ve ran the car through a computer and finally did a compression test on my own. So I figured i’d take it to gumaros to see if they could do a liquid test or a piston height test. Both tests can be performed on the car while doing a compression test.
I dropped my car off and simply explained, I ve done a compression test, these were the results. I need these tests done to see if its a head gasket or piston rings. They said no problem they’d look at it the next morning. Which was acceptable, I dropped it off close to closing.
The next day comes and I call them. They say its on a road test and they’ll call me back as soon as it gets back in. Three hours later. I call them back. The technician over the phone said it was 50PSI cylinder four, 150PSI cylinder three, 170 PSI Cylinder One and Two. When I did the test it was 90PSI ¾ and 180PSI ½. On the paperwork they stated it needed a «valve job». This concerned me greatly.
So I asked them if they’d checked the piston height or checked the rings. They said no, they would have to take apart the engine to even check this. I then asked about the liquid test or piston height test. They rambled on and continued to say they can take the head of the engine off to run a compression check on the valves and run a leak down test. (DING! Anyone catch that? They didn’t even know for sure if the valves were bad.)
When this occurred I then asked the technician who worked on my car if he did a static or dynamic compression test. He, and I quote, says «Uh, we just took the plugs out and stuff.»
Paid the 90 $ Diagnostic fee, took my car home; on the paperwork it said 90PSI in #4. This concerned me, so i poped up my hood. (If you can’t tell i’m anal about my car by now; I am) I specifically moved a wire under my intercooler when I did a compression test. They would have had to move this wire if they pulled the plugs/​intercooler off the car.
The wire was still there, On top of this no one mentioned the oil that leaks from my intercooler because of a bad turbo. You have to remove the intercooler to get to the plugs. You can’t miss the oil, and it is discerning. So these facts tell me they never even did a compression test.

I had worked with Gumaro’s previously when I worked for an auto parts company they bought from, so I already knew they would deal with me fairly when I came to them to get my car smogged. What I didn’t know was how quickly they would get my service done! I was in and out of there in 45 minutes flat with my passing smog certificate in my hand. The price was VERY affordable — $ 36.95 out the door — and I was really grateful to see that Edgar was still there since he was the person I had my previous experience with. I will definitely bring my car back to Edgar and his team if I need it, but I’m going to hope I don’t need to!

Just your neighborhood mechanic shop without all hype like the chain type places. Ed was really nice and provided me with a quote and time estimate on my car. I came from a co-worker’s recommendation and also from the recommendation of other Unilocalers. I have found a new mechanic to take care of my vehicles!

I have had my car worked on several times here. they are very reasonable priced and do a great job.

Nothing fancy here. Basic shop and waiting room. You will be treated fairly with honest service and prices. I have been going here for years and I am throughly pleased.