About a month ago, my check engine light came on, so I stopped by O'Reilly Auto Parts in Walnut Creek for a quick diagnostic. The codes pointed to an Air Injection (AIR) Pump issue; never a cheap repair on a Mercedes. After calling a few independent Mercedes shops, I was not thrilled about the thousands they wanted to charge. When I called O'Reilly's back to order the part, the guy helping me mentioned Mr. Kim at M&N Auto Service, saying he sends a lot of customers there and they're always happy. That was enough for me to give it a shot. I called M&N, got a quote from Mr. Kim, and I honestly couldn't believe it...about half the price of what the other shops quoted. I dropped my car off yesterday morning, and by the afternoon it was done. Mr. Kim was professional, straightforward, and incredibly efficient. Not only did he fix the AIR pump issue, but as a last‑minute request he also replaced a parking light that had gone out. He even checked my tire pressures without me asking. It's rare to find a mechanic who takes that kind of initiative. What really sealed the deal was the personal interaction. We ended up chatting about Korean food, and he told me exactly what to order at Ohgane for the best LA‑style BBQ meats. We were laughing as I left; just a genuinely good guy who knows his craft. I've already referred two family members to him, and one has already gotten their car back and is just as happy with the service. If you're looking for a good, honest, no‑BS mechanic in the Walnut Creek area; especially someone who can work on European cars, go see Mr. Kim at M&N Auto Service. Shops like this are hard to find, and I'm grateful I found mine read more

Excellent service. My Dodge 1500 Ram truck had extreme vibration in the front end. They replaced my coil springs tires, shocks, plus & more. now it's smooth as glass. Offer for a great price. read more

Kim the best mechanic I take all my cars to him Even for oil Chang his price is the best in town You don't have to wait long hours to have your service done read more

I live nearby the shop and have used Kim's services for the 20 years he has been in operation. He is honest and reliable; he won't rip you off. He charges the going rate for routine services, but he will not push non-necessary work on you. I have had 3 different vehicles of my own in and out of the shop with maximum satisfaction and several vehicles of the company I worked for 15 years before retirement. Major and minor repairs. I have paid him to check used cars before my purchase or purchase by my family members and friends. If you think he asked me to write a glowing report, you are wrong. The guy is modest and an exceptional mechanic. You simply won't find this quality service and courtesy in most shops. Anyway, I'm sure not looking elsewhere. read more

Reliable, fast, responsive. Came on time, shop was ready, got the service A done and out the door in less then 30 minutes. Additional info provided on the vehicle needs and timeline. Will be back for more quality service. Thanks Kim. read more

M & N Auto Service - Main entrance and the shop - Auto Repair Near Me - Walnut Creek, California

I've been taking my 2007 Saturn Ion to Kim for the last 5 years. The car has very low miles on it (75k miles) but Kim is always very thorough when checking out the car and is the most knowledgeable and honest mechanic that I've ever met. I don't understand some of the negative comments concerning his attitude or his work but I wouldn't take my car anywhere else. read more

This is and has always been a great place to take our car to. I called up and asked to have my daughters car (2010) looked over before we sent it off to college with her. Called and they told me to bring it in the next morning. By Noon the next day he had it ready with what should be done to it. It was all fair and needed. I have always felt comfortable and able to trust M&N and appreciate them. I would highly recommend. read more

After many tries (including Dublin Toyota) to identify the problem of my beloved 1994 Toyota Land Cruiser, M&N Auto Service are the only one that identified the problem. These guys are very busy as indicated in the parking lot, but it is worth going to them first. Very professional and honest... Max read more

This was my first visit, and the problem was a simple one, but the owner was delightful, the service quick and efficient and reasonably priced. read more

Recently took my vehicle to Kim and so glad that I did. Easy to schedule an appointment with him over the phone and he was on time when I arrived for my oil change. Very friendly, honest and efficient. Picked up my vehicle at the quoted time frame. Definitely will return. Thanks Kim! read more

I didn't get his name, but the guy up at the front is a life saver! I was broken down on the way to San Jose and he helped me get back on the road within minutes. If I lived in Walnut Creek I would have a new mechanic for sure! read more

I cannot recommend this place enough. On Saturday I realized that my radiator fan needed to be replaced because it was knocking dangerously loudly, and every mechanic I called either did not have the availability, or did not work on Volkswagens. One mechanic recommended that I call M&N because he knew Kim worked on Volkswagens. I drove over there, he took a look under the hood and told me he could special order the fan, but that it would not be there until the next day, Sunday and he does not work on Sundays. I rely heavily on my car, and need it for work on Monday. I asked him if he had any advice for me, and he told me that he would come in on Sunday his off day, and repair my car for me. I paid an absolutely reasonable and fair price, and he was nothing but kind. I will absolutely be becoming here, and I recommend anybody who drives a Volkswagen to bring their car here. read more

This place never fails to provide the best experience at the best price. Had my brakes installed here and the work was flawless and they had my car ready same day. THANK YOU M & N!! read more

Very professional! Honest I came to fix issue with my new brakes that I have installed somewhere else. It was an issue that original installer could not find. Kim did a test drive. Lifted car spotted the issue within 15 minutes. Fixed it and charged for less than an hour labor! Very pleased! Thank you, thank you, thank you! read more

My air conditioning went out and he was super helpful! He added the coolant and checked everything over and the best thing is he it me right away! read more

My go to shop for regular maintenance and any unpredictable issues. Kim is a great mechanic! Quick, efficient and affordable.

Favorite shop in the whole world. My family has been going to M&N Auto services for years. Kim, the owner is the nicest man alive! He always makes me laugh and gives fair prices. He is so jolly and sweet. Brandon his assistant is also a very hard worker. Above and beyond service. I wouldn't do to another shop if my life depended on it. Kim is the real MVP! read more

M&N auto is always professional, fair, and most importantly honest with their services.

This is the only place I take my Acura for repairs. Kim and Brandon are wonderful! I've been coming here for over 3 years. They provide honest feedback on what repairs are necessary. Always given the appropriate time frame for when parts are available and labor can be completed. Honest, reliable, efficient AND great to work with... Thank you for your excellent service!! read more

This place is the best! Mr. Kim is thorough and professional and absolutely honest about what needs to be fixed and what doesn't. When I first moved to the area and found myself in need of car maintenance/repair, I called four different places for estimates and this places was the cheapest by hundreds of dollars- no exaggeration. The next few times I needed my car serviced, I followed the same procedure- called around for estimates, and always the cost of repair here was consistently only two-thirds of what everyone else was charging. Mr. Kim is also a great resource if you have a lot of questions about your car. He has lots of great advice and recommendations. I can't recommend this place enough! Who knew that auto repair could be such a pleasant experience? read more

Had the timing belt, plugs, air/oil filters and new brakes fitted at M & N on my 2006 Subaru Outback just before setting off on a long trip. Brandon did a great job, the price was fair and the car feels and drives like new. Would recommend M & N without hesitation. read more

Mr. Kim is really honest. He asked me to drop off my vehicle since I was having issues with the car sputtering. He called me 45 min later and said it was a burnt out spark plug. Price was competitive and the service was awesome. read more

Mr. Kim was so helpful and even was able to catch an issue that resulted from another auto service. So glad we were able to find this place, definitely coming back! read more

In this shop you do not get what you were told on the phone! the owner,s attitude a lot to be desired! a very expensive place of service ! if problem after their work is done it goes in their deaf ears !! i called one time after repair of Mercedes sl 500 which was not done right the owner said " we are going to be very busy " wow , i never have been there again!! our lovely city of Walnut Creek deserves better then this!!!! read more

We have been going to M&N for several years now and Kim and his crew have worked on our Ford F150, Mercedes and our son's truck. The level of service is superb and the pricing is very good. Kim always manages to figure out what is wrong and get things fixed, right the first time and in an excellent time frame. In example, my mom's car diedy yesterday. She took it to Kim's last night after hours. Kim looked at it this morning, told her what was wrong and had it finished by 2pm! When I dropped her off there was a Ferrari parked outside of his shop and it turns out that the dealerships are having him look at their used cars to assess them. Very cool. I trust all of our cars to Kim and HIGHLY recomend him. Oh, one other thing, my husband had a pretty bad accident in our son's truck. The body shop that we used did an excellent job but there was a squeak that they could not figure out. They said it must have already been there before the accident. We knew that was not true. We took it to Kim and within 10 minutes he had diagnosed it, a crack in a busihng or bracket or something (I am not a car expert) that was totally due to the accident. This guy knows his stuff! read more

Been have my car repaired done with Kim for couple years. I have a 2002 VW, but only has 120,000 miles on it. As a customer, I want my car repair, done and go, but not sure if my car is getting old or what, since one incident got fix in this place, more problems occur, and my car is in and out of this shop multiple times in last two years. Until my AC went down last April 2017 and Kim said is the compressor and replaced it. I agreed. But less than half a year, the AC goes down. I told Kim the AC not working in Feb 18, he said it was not hot enough to inspect. Ok, I come back in April, he said the same, then I back again in July, put my car in his garage for a week, no response or notification for what's wrong and how to fix it, until I called and KIm said he still figuring out . All the sudden, a day later he left me a message and said the compressor is fine, but the valve had to be replaced coz it was blocked my debris and charged me another 500 buck. I'm very patient and as long as it's get fix, I'm cool and that 500 is not a lot for me. But you know what, after less than four days driving on the street, a loud noise came from the engine, my car loose power and my car stall on the street and almost got an accident with cars behind me. I'm devastating. Manage to put my car to another mechanic and the inspection result said. "Compressor forzen, belt torn and smoked, complete replacement required". I'm so angry and called Kim and you know what he said, the compressor is only covered under 3000 miles or less than a year. It is not under any warranty any more." KIM, I DONT CARE it is covered or not, and I don't want you to touch my car anymore. My point is your poor work had put me and my family in danger. This is worst than unprofessional . read more

Mr. Kim and Brandon are awesome! Rewinding a little...I had to replace my spark plugs on my 2010 Nissan Sentra. The Nissan dealership was gonna charge me $800 for the darn thing. Fortunately, my uncle Jim recommended me to see Mr. Kim. He replaced my spark plugs, changed my brake light bulb, and even replaced one of my engine's hoses (sorry don't remember what) for half of the dealership's quoted price... I am a happy camper. Then, just recently, my car suddenly stopped at a busy intersection. I meant I could not move at all...blah blah...I got my car towed...blah blah...to Mr. Kim's place. The next morning, Brandon came in, opened the hood, and found the problem! The cap on the hose of my inlet air to the engine fell off, that was why I could barely start and could not move the car at all.Thank God I thought I was in big trouble... Anyway, Brandon found the cap somewhere inside the goodness under the car hood, and he put it back for me, no charge! Love him already... :) I highly recommend this place! If you need service(s), Mr. Kim will tell you that you need it/them. If you don't, then you don't. Really, we need more places like this! Thank you Mr. Kim and Brandon! read more

I'm a smart girl who knows NOTHING about cars, except how to describe them by color, put gas in them, and drive them. So, whenever my Cooper is need of some TLC, I always feel confident bringing my car to M&N Auto Repair and more specifically Kim. He always shoots me straight, fixes my car in a timely and friendly manner, and charges a fair and reasonable rate for his excellent service. read more

M & N Auto Service - Auto Repair Near Me - Walnut Creek, California

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I'm posting this review quite a bit after I had my car serviced by M & N. My Prius began making a loud noise on the freeway on my way to work and I brought my car to M & N at the recommendation of a coworker. They were very honest and completed the repair within a couple of hours. read more

Love Love Love !!!!! Amazing !! Me and my boyfriend came and got our breaks and rotors fixed. He ordered everything !! And did an amazing job very quick read more

Finding an honest, knowledable, mechanic? Yes! I had my brakes replaced by another company (shares the same parking lot as M & N) and what a terrible screeching noise came out of the back right brake. I took it to them 4 more times! They could never fix it. I took it to M & N.... he found they had put the wrong size brakes on the back. He changed them, and, now...no noise, just quiet brakeing. His knowledge and honesty is refreshing. And, he is just the most pleasant person to know. I have recommended him to friends and neighbors, all rave about him:) This is the place to go. read more

I think this place is awesome! I called him, went in with my car and he explained what the problem was. I left my car and picked it up that afternoon. He was professional and reasonable. Usually being a female you sometimes feel taken advantage of in these situations, but I never felt like that at all. I highly recommend you use this place! read more

The local shop that gives you the honest opinion and the fair price we all want. I've been to Kim and his shop several times and each time I've gotten the problem fixed. You do not get the uneasiness that you get when going to the dealership repair shops where they swindle you of your money. Kim will test drive your car (with permission of course) to get to the problem if you're having trouble describing the issue. So far, he's been able to correctly identify and fix the problems. The best part is, he's honest and upfront about the costs. I'll be taking my car straight to Kim as long as they're around. read more

One of the best repair shops i have visited. Very friendly, honest, great attitude and took care of me right away. Ran the diagnostics and took his time to explain the problem to me without charging a penny. I would definitely go back if in need for any repairs and would recommend the place to others in need of car repairs. Much appreciated! read more

All-In-All: Very great service, good quality work and done in a timely fashion. I brought in a broken power steering pulley pump (the old and a new one) as well as the pulley wheel which had a broken off shaft stuck in the middle. I was unable to remove the shaft from the center (with tools and 300 lb helper) and so I called a local machine shop which recommended this place. I brought it in and (Kim) said he would take a look at it. He mentioned he would give it a shot and call me by the end of the day. Well he was able to get it off and he even installed it onto the new power steering pump! The only reason I didn't give a fifth star is that when I came in to pick it up Kim was not there and one of his helpers called him. The helper then told me it was $50 bucks. I don't know if that's what Kim told him but I just feel it was too much, and left a question mark in the back of my mind. read more

Honest and capable. Brought in my Mazda because the power seat was not working. He quickly diagnosed the issue to a broken motor cable, but was unable to find the part for me. I spent a few hours online, found the part on eBay, and he was able to perform the labor to install it for a very reasonable cost, compared to what the Mazda dealer was quoting me for. All in all, very happy with the service and price. Thank you! read more

I learned about M&N Auto four years ago through a roommate that took all of his vehicles to Kim. He told me Kim's garage is the best kept secret in the east bay for fair and reliable service. I couldn't be more happy. I now live in South San Francisco and happily drive to Kim's shop for a simple oil change. I was putting an average of 35,000 miles a year on my Hyundai and Kim always kept me on the road. He's done my vehicle's timing belt, serpentine belt, clutch replacement, brakes, electrical issues, oil changes and regular service. Kim is a former US Marine and, as such, holds himself to a high standard of excellence; in his committment to service and his estimates. I have read some of the whiney reviews posted and find them laughable. A successful mechanic always has multiple cars in service and gets them out the door quickly. Kim performs like aces. If you are looking for an honest, hardworking, reliable and friendly mechanic, Kim's your guy. If you want your feet massaged after "service technicians" carry you from your car on a palanquin to a lounge area with Starbucks and a big screen TV, go elsewhere. Sempre Fi read more

I don't normally write reviews on Yelp (or anywhere), but in this case I felt like I need to share my experience here today. I've been going to Kim for all my car troubles for several years now. My brother is a car hobbyist, and we all have heard stories about the dishonest mechanics out there (who "fix" problems that aren't really there, or make new problems that will need to be fixed in the future), so we are especially cautious about who we trust with our auto repairs. Kim is awesome - extremely knowledgeable as well as honest and fair. Don't expect him to coddle or beat around the bush, he will be straight to the point and straight forward, but you can rest assured that he is keeping your best interests (for your vehicle and wallet) in mind. I recently had some potential transmission problems in my 2003 Honda Accord (after letting it sit for about 2 weeks while I was out of town), so I brought it in for him to do an assessment a few days after, change the transmission fluid if needed and see whatever else needed fixing. He ran the diagnostics, made a thorough assessment, drove the car a couple times and looked into all my concerns, but the car was no longer acting up at that point. The diagnostics looked fine, the gears shifted normally, and the transmission fluid looked totally fine. He recommended I just pick it up and drive it a few more days like normal, and to just bring it back in right away if I felt it acting up again. He didn't even want to charge me for the assessment since he didn't think any fixes were necessary at present. With some other mechanic, I would NOT have been surprised if they changed the fluid simply because I suggested it, even if it looked perfectly normal, just so they could make some money...but not Kim. He told me he didn't want me wasting my money on any unnecessary services, considering they were unlikely to be the cause of the initial glitch I felt. That type of honestly and transparency is hard to come by these days, so you'd definitely be doing yourself a favor to take your car to M & N Auto next time you have any concerns. read more

UPDATE - following my one star review last year... The owner of this shop sent me a Yelp message in regards to my one star review. His message included threats towards me if I didn't take my review down. It was extremely unprofessional, and unethical. I wonder how many other bad reviewers they threatened to get good Yelp reviews? DO NOT TRUST THIS SHOP read more

The despicable owner messed up my car in Aug 2020, unleashed a huge oil leak from the timing cover while he replaced the oil pan gasket. He purposely created 2 phony repairs to covered up his mistake ~ valve cover gasket & crankshaft seal ( $800 ~ the money could use for timing cover repair. Another repair shop in Jan 2022 told me the crankshaft seal is popping out & leaking oil ) that did not stop the oil leak on the ground and subsequently smoke from oil drips onto exhaust. He blamed " drain plug .. drain plug " . Underhanded tactic " hide & delay ". I began to suspect he made a mistake/messed up my car by November 2020, but couldn't nail him. It gave him an opportunity to have FUN with my car. Once said to me " next oil change, oil leak will go away " in March 2021. He even referred me to a " muffler " shop for exhaust issue in September 2021. I complained to him in person & by phone about the oil leak for months, he did not care and just ignored the problem. My repair receipts are either " estimate " or " draft " NOT invoice, wonder IF other customers got " actual invoice ". The truth, every auto repair shop messed up at least a few cars. I have 1 word for you Mr Kim " Karma " . read more