2018 WRX "UPDATE"... After the leaking issues on the motor rebuild I brought the car back. Martin went above and beyond to fix multiple leaks that came about from the rebuild. I trusted Martin to fix everything and make things right. Martin will do whatever it takes to make this right and have a satisfied customer. I had to have patience and it paid off! The car feels and drives like how it used too! Martin's character to makes things right is why people should come to his shop. He will help out to the best of his abilities to make the customers satisfied. Thank you Martin!! read more

5 Stars - TMC Auto Repair in Diamond Bar (aka the place that actually gives a damn) Let me paint you a quick "before and after" picture so funny it hurts: Scene 1: Midas in Diamond Bar, 3:50 PM I roll up with a driver's window that's basically on permanent vacation (stuck halfway like it's trying to ghost me). The guy behind the counter doesn't even glance at the car. Doesn't ask a question. Just grunts, "Yeah, it's the motor." Me: "Cool, wanna pop the door panel and confirm? I'll pay for the diag, takes 10-15 minutes tops." Him: refuses to move, refuses to look, basically treats me like I'm trying to sell him oceanfront property in Arizona. I left wondering if "customer service" is now Latin for "get lost." Scene 2: TMC Auto Repair (literally two minutes away, same day) I used to go to this shop years ago when it had a different name. Now it's TMC and let me tell you -- it should be called TLC because that's exactly what they give you. Walked in frustrated and Martin greeted me like a human being who mattered. He listened to my Midas horror story, laughed with me (not at me), and said, "Let's actually look at it." One of his techs pulled the door panel in like 8 minutes and... drumroll... the motor was bad and there was a broken plastic piece in the regulator (exactly what I told Midas Guy, who apparently moonlights as a psychic but forgot to charge his crystal ball). They got the window temporarily working until the new part arrives, didn't overcharge me, and treated me like I've been their customer for a decade (because I basically have). Moral of the story: Midas Diamond Bar just lost a customer for life in under five minutes. TMC gained a customer for life in under five minutes. Martin and his crew are professional, honest, fast, and actually enjoy fixing cars instead of playing "guess the problem from the lobby." If you're anywhere near Diamond Bar/Walnut area and need work done by people who treat you like family (the good kind, not the dysfunctional Thanksgiving kind), go see these guys. 10/10, will be back the second that part shows up -- and for every oil change, brake job, and random rattle from now until my car retires. TMC, you have my undying loyalty... and my window now goes up AND down. Magic. Show less read more

Came in with my moms car to get a quote, after leaving the Car Martin gave me a call to explain everything that was going on with the car, explained what needed to be replaced and fixed to have the car up and running to get the car to optimal condition. Overall I'm pretty satisfied with the service they provided. I most definitely will come back and refer them with my friends and family. read more

I had an amazing experiences with getting my car service with Martin. Every time I came in the environment was professional and friendly. With each questions/concerns they were answer with such details to give me a better understanding. Finally troubleshooting was quick and concise. The repair of my catalytic converters went amazing and it's running smoothly! read more

Highly recommend this place! I brought my Porsche in for an oil change and their prices were so reasonable. They also installed a new battery at a really good price. This place is honest and fair and they've found d a loyal customer! read more

They made it right. Much love to Martin who wouldn't give up. First time I went in they couldn't get it right, so they refunded me completely. Shocking honesty. I decided to give them another try since I felt they were really determined and cared. This time they were able to clear the dreaded Check Engine Light. My car now runs beautifully and I have just passed my smog check :) read more

It's on the expensive side, but customer service is great and good service. Worth the money.

Took my 72 nova down to TMC for some issues I was having with my motor. they were able to find and recreate the nosie to make sure they found the problem and fixed it . professional and detailed work would recommend for all your classic car needs read more

TMC Auto Repair - Auto Repair Near Me - Walnut, California

Took my K5 Blazer to Martin at TMC Auto--worst experience ever. He said it would take a couple days and convinced me he would have it ready for a car show i had planned; they kept it two weeks and then admitted they couldn't fix it. When I picked it up, it was filthy (branches, leaves, bird droppings) and had broken and missing parts in the engine compartment. Zero communication, zero professionalism and keep in mind I keep my vehicle indoors in my garage. I'll never trust this shop again. read more

TMC Auto Repair - This is my Blazer and here for reference in regards to the debri inside - Auto Repair Near Me - Walnut, California

My car got hit by another car when parked on the street, I was concerned about the transmission, so I called TMC Auto Repaid, Martin answered my call quickly and offered to check the transmission for free. I arrived the shop, was welcomed, and they took my car to test the transmission and even run the car through computer to see if there is any hidden issues. Really good and professional service. The repair studio is big and organized. read more

TMC Auto Repair - Inside - Auto Repair Near Me - Walnut, California

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In life, there are 'Argh!' moments that come your way, like when your car breaks down or you encounter engine trouble while driving. Family is out of town and you have no one there to help you. After contacting the towing company, I started searching for a shop to take my car to. I called several shops, and TMC Auto Repair was one of them. I have talked to Martin, who I think is the owner. He listened to my situation and showed sympathy for what I was going through. He was very accommodating, sent me the shop's location and detailed instructions on where to park my car and drop off the keys, especially since they were closed for New Year's. I truly appreciated how he answered my calls, even on holidays. Martin kept me updated with calls and texts once they started working on my car. He even expedited the replacement part, which had to be ordered and shipped from California. He understood that I still need to drive out of town. Labor and parts were priced accordingly. I was really happy on that day when he called up to let me know my car was ready for pick-up. Martin even waited for me beyond closing hours, as I was still waiting for my ride to the shop. While our interaction was business-related, I am sincerely grateful for the assistance Martin provided during my time of need. I must also mention that the towing guy was also nice. Glad to know there are still kind-hearted people in this world. This is what I call exceptional customer service. I have never regretted choosing TMC Auto Repair. read more

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I brought my car to Martin after buying a lemon and he was nothing but helpful and understanding. He did everything in his power to try to help me get my car fixed and worked with me in speaking with my insurance and was all around just a super nice human. I believe this shop to be reliable and truthful and will be sending all my friends here in the future. Thank you again Martin! read more

Had suspension maintenance work done at a different shop and a month later a ball joint snaps and my tire just about came all the way off. Collision place didn't want to work on it because its an older truck (2002 Dodge Ram) and couldn't get parts. They told me to get the parts and after some time (lagging on my end) I finally get around to ordering the parts, but now they dont want to work on it because it's not original manufacturer parts. I search around online and come across TMC with great reviews. I need to have my truck towed asap and decide to stop by TMC on my way to have my truck towed. I talked to Martin, explained the issues and he says to bring it in!! Not only was TMC knowledgable about the issues at hand, they kept in touch and gave me updates throughout the day. My truck, which had been sitting at another shop for close to 2 years was completed in one day at TMC!!! They worked overtime the regular hours, which I appreciated, and even when I forgot some parts that I purchased that didn't fit, they called me the next day to pick them up. I paid close to a thousand for those 2 parts alone and really appreciate the honesty. When I drove my truck away about an hour past closing time, I could see the team cleaning up and getting ready to leave for the day. They were full of genuine laughter and smilies. Seeing their interaction in the time I was there, you can tell a good team when you see one. This makes all the difference. The truck drove great and after a lot of barriers and anxiety from other shops, TMC got to work and did an awesome job. This is a great shop and I can say that have now found my new mechanic. Highly recommended. Thank you Martin and Team!! read more

If you need a shop, this is the place to come. Very fair prices, always keeps you updated on your vehicle via texts, notes, or photos. Values your time and understanding that you need your vehicle. Technicians are very respectful and keeps the shop very clean. TMC works on anything and everything. Don't pass them up... they are the place to go in Walnut read more

Worked with Martin (owner) who was friendly and professional. My 2018 Jeep Wrangler needed a new radiator and Martin made the process easy by working with my schedule and ordering the necessary parts ahead of time. The installation took only a few hours, he avoided removing the AC which saved me in work hours and freon. I don't know what else Martin did but my Jeep runs like new. It's peppier and definitely runs cool. I highly recommend TMC, honest and affordable. read more

TMC Auto Repair - 2018 Jeep with new radiator from TMC on road trip to Oregon. Runs like a dream. - Auto Repair Near Me - Walnut, California

Both the owner and 2 mechanics treated both me and my car with respect and Professionally. I was a bit wary to see the young mechanics were in their late 20s yet the disposition and charming personality of the owner in his late 30s set me at ease. I own my 1990 VW Corrado G60 and brought it in to get my ignition timing correct. Lickity split after checking a few areas they started and finished the job in 20mins. It wasn't so much the speed but the Precision in handling my Baby VW. I've owned it for 16 years and NOW I will be bringing all my Mechanical auto repairs to TMC in Diamond bar despite the distance driving from Pasadena. Many other shops did not want the responsibility of Touching NY Baby! RTJ. VW CORRADO G60 read more

TMC Auto Repair - Racing German Flag stripes - Auto Repair Near Me - Walnut, California

Martin is amazing. 10/10 service! He fixed my A/C quickly, explained everything clearly, and went above and beyond. Highly recommend TMC Auto Repair! read more

After 3 Macanics and more then $1000 on unnecessary parts that my truck didn't need!! I brought my 2008 Chevy Silverado to Martin not only did he fix the problem he did in less than one day I just want to thank Martin and his crew for the work they did on my truck!!!! read more

5 Stars - TMC Auto Repair in Diamond Bar (aka the place that actually gives a damn) Let me paint you a quick "before and after" picture so funny it hurts: Scene 1: Midas in Diamond Bar, 3:50 PM I roll up with a driver's window that's basically on permanent vacation (stuck halfway like it's trying to ghost me). The guy behind the counter doesn't even glance at the car. Doesn't ask a question. Just grunts, "Yeah, it's the motor." Me: "Cool, wanna pop the door panel and confirm? I'll pay for the diag, takes 10-15 minutes tops." Him: refuses to move, refuses to look, basically treats me like I'm trying to sell him oceanfront property in Arizona. I left wondering if "customer service" is now Latin for "get lost." Scene 2: TMC Auto Repair (literally two minutes away, same day) I used to go to this shop years ago when it had a different name. Now it's TMC and let me tell you -- it should be called TLC because that's exactly what they give you. Walked in frustrated and Martin greeted me like a human being who mattered. He listened to my Midas horror story, laughed with me (not at me), and said, "Let's actually look at it." One of his techs pulled the door panel in like 8 minutes and... drumroll... the motor was bad and there was a broken plastic piece in the regulator (exactly what I told Midas Guy, who apparently moonlights as a psychic but forgot to charge his crystal ball). They got the window temporarily working until the new part arrives, didn't overcharge me, and treated me like I've been their customer for a decade (because I basically have). Moral of the story: Midas Diamond Bar just lost a customer for life in under five minutes. TMC gained a customer for life in under five minutes. Martin and his crew are professional, honest, fast, and actually enjoy fixing cars instead of playing "guess the problem from the lobby." If you're anywhere near Diamond Bar/Walnut area and need work done by people who treat you like family (the good kind, not the dysfunctional Thanksgiving kind), go see these guys. 10/10, will be back the second that part shows up -- and for every oil change, brake job, and random rattle from now until my car retires. TMC, you have my undying loyalty... and my window now goes up AND down. Magic. read more

My 2015 Jeep Grand Cherokee overheated on my family while we were in town. Martin is all about service. We didn't know what the issue was, and he patiently answered all my questions. He keeps you informed with text messages, phone calls, and even a link to see photos and progress of you car. He even invited into the shop to show me the engine and the work that was being done. Martin was in a constant communication, and diagnosed the issue. He's not quick to push the expensive job, but instead outlines the options you have and talks through it with you. read more

Excellent experience at TMC Auto Repair! Had replaced my broken suspension along with oil pan gasket and sway bar bushings with a very quick return time. TMC provides a detailed breakdown of everything via text along with really responsive communication and very reasonable value. Martin and Ysabelle were extremely helpful and accommodating with high quality work, will definitely be back for any auto repair needs read more

Best new auto repair shop in the area. The work done on my wife's BMW was timely and Martin's communication via text was very convenient. The waiting area was spacious and nicely decorated. Definitely a "go to" spot for future repairs on my cars. read more

My Toyota Camry SE recently needed new front axles. Got them replaced same day for a great price. Travis and Martin were great to deal with. TMC recently moved to the back of the building from the old location. New waiting room is nice with tv, seating, and cold water. They also offer taxi ride home if needed. All parts have warranties. Car drives great! read more

When I called you about your alternator failed again last month, merely after 4 months. Your first reaction was 'Yes, we can replace it but there could be other electrical issues that we need to take a closer look, that could be the reason caused the alternators go out so easily.' You did not acknowledge the part quality that you installed was the problem, even though you know they are not the quality parts you provided, and that is why you are willing to provide the warranty because you know they are cheap junks, which fail often and could fail anytime. And once they failed, you would point out other things are actually the problem so you can do more repairs on those poor returning customers. Behind your charming appearance and smiles, that is the game that you are actually playing. I am not confused at all. From your reply, I am now giving you the lowest rating for the shenanigans that you are operating for your shop. I am very clear on this, and hope there is no confusion, or delusion on your side as well, thinking that you can still bribe me out of this disappointing experience to charm me over and bribe me back. Do better, Sir. read more

Great service and great prices. They are always fair and don't recommend unneeded services. I take all my cars to TMC.

Dealership found worn bearings and sway bar links during routine inspection for my wife's car, but quoted too much and had other unnecessary recommendations. Martin was very good in responding and was able to do the work the same day we communicated. Price was average, so not cheap but still much better than the dealership. No problems so far. Will update if anything changes. read more

Will take weeks with your vehicle, with a lot of runaround and excuses. Does not honor warranty work. Find a different mechanic/shop.

Martin is the Man. I got a blown head gasket on my 2018 jeep grand Cherokee and Martin was helpful and fixed my jeep. I really appreciate his honesty and service he will always have my business. Thanks alot Martin to you and your guys god bless you guys . Ran my jeep a week now n smooth ride like new. Plus he fixed my starter, my jeep starts fast now. Hope you guys never change the way you guys do business thanks read more

This auto repair shop is customer facing and honest. The shop owner understands the customer's need and provides excellent service and value. I highly recommend this auto shop to everyone and I will be a life long customer! read more

Replaced a cvt transmission for a Nissan versa at the lowest price point and quickest turnaround of all the area including oc area. 4 months later and still no issues. They deserve a good review, so here it is. read more

I highly recommend TMC Auto Repair Shop! Martin is very accommodating in all our queries. The total amount we paid for parts and labor are reasonable. And the very happy part is they offer us a free ride going to our house because the repair will takes hours (via uber). They have free snacks and drinks too! If you want to stay and feel bored they have a table games to do, so no down time while waiting! I'm glad we found a trusted shop, and we will definitely be back for our future repairs. More power to TMC Auto Repair Shop!!! read more

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Our Lexus was diagnosed at the dealership, we received a quote for labor and TMC completed the job for a fraction of the cost. Thank you Martin. read more

This was my first time at TMC. I came in for an A/C diagnosis and I was impressed with their experience. Martin clearly explained what was wrong and walked me through exactly what needed to be done to replace the evaporator core, step by step. Martin's communication was honest, detailed, and easy to understand. The work was completed quickly and professionally, and it's obvious these guys know what they're doing. Skilled, efficient, and straightforward. Highly recommended TMC if you want quality service done right. read more

very good customer service and excellent communication (you experience why). Def would continue service from Martin and his crew!!

I usually don't write reviews unless the service was extremely bad, or extremely good. Getting my car serviced at TMC Auto was a very gratifying experience. Martin was extremely professional, knowledgeable and an absolute pleasure to do business. Most of all, I really appreciate his honesty. After diagnosing my vehicle he determined that my dead/weak battery is what was causing my check engine light to be on. A dishonest mechanic could have advised me that in addition to needing a battery, something else was causing the engine light to come on. Even offered a 10% discount after learning that l was a peace officer. A flattering act of professional courtesy. read more

When my truck wouldn't start I called TCM based on their customer reviews and Martin was great. Honest, helpful, and knowledgeable. Their team was great to work with and the shop is nice. If I need a mechanic in the Pomona or Walnut area again, I'll absolutely go to TCM Auto Repair. read more

I brought my 1965 classic car to TMC Auto Repair for a poorly running engine that was installed by another shop. The engine was jumpy and exhaust was really rich. The car wasnt fun to drive at all. Martin didnt hesitate to take on the job and quickly determined that a cam replacement and proper tune would get the car running properly. Boy was he right. He completed the repairs within two weeks with regular updates! Try that at another shop! Most shops wont touch classic cars. The car runs great and I'll be driving it more often now! TMC; Thank you Martin! Ray, from Covina read more

Shout out to TMC ! Super friendly staff ask for Martin (The Owner). Went in for an oil change, ended up needed a couple other things done. Made sure to be very informative on what and why. Made everything super easy. Thank you to Martin and his Staff! read more

Came in today to get my valve cover gasket estimate. Martin checked the car showed me pics where the leaked is coming from and gave me a quote for about $298 which i think is reasonable. So far the car is running good and i haven't noticed leaked yet. Martin is Trustworthy he works hard and do an excellent job. He is Not like other shady mechanics. So if you need a Trustworthy and good mechanic go see TMC auto repair Martin . I will be coming here for sure and will recommend TMC Martin to people i know! read more

TMC Auto Repair - gasket valve. - Auto Repair Near Me - Walnut, California

Extremely honest and professional. Lexus was trying to charge me over $1000 for maintenance alone and he charged me less than $200 for the exact same thing that I needed it. He finished my car in a timely manner, there's snacks in the waiting area, which is amazing. I will definitely be back to get my future services done as honesty goes a long way with me. Thank you so much, Martin. read more