AU Tuning is my go to trusted shop for maintenance to mods. Enthusiast owners and certified mechanics who are professional, responsive, and always happy to help. Highly recommended! Worth the drive no matter where you are in LA county. read more

This doesn't get much better than this. I had bought some stuff thinking it's an easy install but i didn't have the right tools. i called around and Nick was able to assist me in getting things squared away. i came in, nice place by the way, and they took care of me at a very fair and reasonable price. loved it. wish i was going to live down here longer because i know of a few other things i need worked on my car. read more

Wow this new shop is stunning! I absolutely love it, and so great to see them growing as a company. Nobody deserves it more! They work with integrity and provide a top notch service. I highly recommend OC tuning for all your car needs. read more

Auto Union Tuning - Entrance - Auto Parts & Supplies Near Me - Placentia, California

Spoke on the phone with Rozz from AU tuning. Took the time to answer all my questions and was more than available. They have worked on my car for years and always done a great job. Would highly recommend! Thanks again guys! read more

This shop cares. If you care about your car, you know how hard it is to find someone trustworthy and honest, and think in your shoes or using the cliche "treating your car like their own". This place genuinely made me feel like they do. Having multiple high performance cars across different makes, it's a constant battle finding the right guy to work on them. I tried going to the official dealers with a nice front, getting charged outrageously in the front end and getting screwed at the back end, either over subpar work, multiple visits or even hidden unresolved issues. Also tried going to places that charge cheaper, but treat your 6 fig car like a honda sitting in the sun for months letting the sun damage the leather and swirls all over the clear coat, never again. You also have very good shops that used to be good, but as they grew busy and big, management suffers and you get a decline in customer service and quality of work while paying more and more over the years. That's why AU tuning is a gem really. They are very detailed oriented, the mechanic's repair notes are some of the most thorough you will see, describing the cause, the findings and resolution. For a simple service, you will receive 20-50 pictures of the work being done plus any damage or stuff that needs attention that they see. Simply mind blowing. Remember those a million pt "courtesy" inspection done at official dealers as part of your oil change? complete BS. The tech didnt check anything other than perhaps tires and brakes. So if you are a very demanding and detailed customer like me, you provide instructions and details and they actually read it and take note. You share instructions from forums, youtube videos of similar problems or others performing the work, they actually read and listen instead of blocking it out due to ego or not willing to spend time on it. They also really watch the cosmetics side of the cars really well, they cover up the rear quarter panels with temporary ppf when they need to reach over the panels, so to avoid swirling up the paint. They dont wipe it down with some wet towels and swirl up the paint, they leave it untouched for a proper wash when you get the car back. All your services also get reported to carfax, which I think is great as that provides a good history to the car. They are also very flexible and open with your providing the parts (just no warranty associated with it), which a lot of places dont do. I got to know them from a friend who swears by them with his r8, and so I tried them out with some warranty repairs on my r8 and couldnt be happier. They know how to deal with 3rd party warranties and makes the process a breeze. Then I realized they work on cars in the VW family (bentley,porsche, lambo) and started sending other cars other than audi. When I asked if they work on the italians, they are very upfront to let me know they have limited experience and are willing to try. I sent in two of mine italians and they graciously helped me out with a lot of stuff. Great people with right tools and equipment at this place, more consumers need to know about this place read more

The team at this business completely turned an unfortunate event around. I appreciate them going above and beyond. It's been many years since I've had the trust of a good mechanic and I believe they do a great job here. They have earned my trust!!! read more

I was referred to AUT by a good friend of mine and I can't thank him enough for it. In fact, I call or text him to say thank you just about every time I pay a visit to the shop because it's always an awesome experience. Not only are their rates reasonable but the level of care and attentiveness is on another level. Raz & Dave, who run the operation with the assistance of Nick, are all first class guys who care deeply about the clients they serve. The techs are efficient and super detailed as well. It's safe to say that I found my shop for life. Thanks AUT. read more

Very efficient service. Front desk man Nick is excellent. Prices were fair and I would recommend their work.

Took my 2022 Audi SQ5 here for an 034Motorsport tune and I'm very happy with the service provided! This is my shop now, for sure.

Raz and Nick are the best. I have had them work on my Golf R a few times, and it's always a pleasure to work with them. They are quick but thorough in their work. And it's clear that they are knowledgeable and passionate about the work they do. They best part, though, of coming to OC Tuning is that I feel like I can trust them. And when it comes to someone working on your car - something many of us cherish - having trust in your shop is so hard to find by such a gift to get. They are always willing to take extra time to talk with me about what my vehicle needs. They make sure I understand my options, and explain the pros and cons to what I need to get done. And what's great is that they never push me towards any decision. When we are deciding on something, they always try to find the most efficient and cost-effective solution. It's crazy, coming from getting services at a dealership, to have a shop try to save me money while providing exceptional parts and service! On the one hand, I don't want OC Tuning to get so busy that I can't get an appointment, but on the other hand I honestly think anyone with a VW, Audi, etc. should come here, make this their home shop, and never go anywhere else. I'm not going anywhere else. read more

These guys are awesome I was recommended to them through a friend and they took amazing care of me they even took on my car that isn't a car they normally work on and they knocked it out of the park I'm extremely happy with the work they did and the service they provided I woke a dealership and most places will try to charge your for things you don't need they didn't do any of that thank you Oc tuning! read more

Auto Union Tuning - Auto Parts & Supplies Near Me - Placentia, California

Raz is the man! Raz provides great customer service and always willing to answer questions and help the aspiring enthusiast. I'm looking forward to coming back and continuing to build upon this relationship and my car as well. Raz and Nick had me in and out rather quickly and efficiently. My car was still pretty new to me, but they made sure it felt that much newer! Thank you for all the help and for indulging my curiosity. read more

Auto Union Tuning - Auto Parts & Supplies Near Me - Placentia, California

I've been going to AU tuning since I got my new VW. Now that we moved to south county I'm so happy OC Tuning is open. Raz and Nick are always there to help install new mods or diagnose a problem. They are professional, knowledgeable and most of all great people to work with. Don't look anywhere else if you need anything for your VW or Audi read more

Auto Union Tuning - Auto Parts & Supplies Near Me - Placentia, California

Initially, my friend and I were looking for a place to do the APR stage1 ECU upgrade. We decided to come to this place because of the positive reviews. It turned out that OC tuning indeed did a wonderful job! The installation process was quick, and Raz, who helped us to do the upgrade, was quite knowledgeable about our vehicle models (my friend has a 2015 Audi A3 and mine is a 2013 Audi S4). He was also very professional and patient while answering our questions. I'm really satisfied with the extra horsepower & torque. Recently, with Raz's help, I had my AWE touring exhaust as well as the APR open intake system installed. They charge you at a very fair price, and they respond to your requests/questions timely. I'm looking forward to going back to OC tuning and add more mods to my car! read more

Auto Union Tuning - APR open intake - Auto Parts & Supplies Near Me - Placentia, California

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Great shop to bring my B7 Avant. The guys know their stuff. The move from HB was great for me, closer to the north county.

Couldn't recommend OC Tuning more! Very friendly service and Nick went above and beyond when helping me out. As someone who does not know cars well, they were extremely helpful and I will definitely be returning! read more

These guys are great. Never rip you off. They get straight to the point and figure things out quickly. I've brought my Audi for maintenance and had it tuned but they've also fixed issues that other shops couldn't. Definitely recommend this place and Raz is the man. Definitely knows his craft! Thank you guys ! read more

Auto Union Tuning - APR Tuned - Auto Parts & Supplies Near Me - Placentia, California

Raz worked with me over 2-3 weeks to take my Audi SQ5 from stock to a stage one tune, and then on to a stage 2 tune and dual pulley set up. By the end of the process, I would recommend Raz over any tech that I have had work on my car. He couldn't be more knowledgable about my engine platform (3.0 TFSI) and all of aspects of taking it up into the 400-500 hp range. Beyond the knowledge, they were incredibly accommodating, allowing me to drop the car off during off-hours, and even coming to work on the car late at night during an emergency situation. Overall, I would highly recommend this shop to any person looking for a place to take amazing care of your vehicle, and I will definitely be back for any needs I have! read more

The guys there are super friendly and get work done efficiently. This is definitely my go-to place for all my GTI needs. Thanks!

My husband and I have been coming here for over 5 years. We would drive the distance from Fullerton to Huntington Beach because they are honest, professional, and work hard to meet your needs. They understand the dire situation many are in with out use of their car and work very hard to find solutions. Every encounter I had with Raz or his team has been pleasant. I can't picture myself going anywhere else. We trust them and highly recommended their services. New location in Placentia and we are just as happy with everyone at this location too. read more

We have a Tiguan with 135K miles on it and the engine siezed on the crankshaft bearings... Raz at AU Tuning helped us figure out our options. We decided to replace the engine. In less than a week, AU sourced a new engine, pulled the old engine, swapped over the harness and all of the accessories from the old engine and got the replacement installed. I have been driving it for a few weeks now and it feels like a new car! Raz and the whole team at AU went above and beyond to make a tough situation livable. I can't say enough praise for their customer service, professionalism and attention to detail. If you haven't found a perfect shop for your Euro car yet, check them out! read more

Had troubles with my VW GSW battery this morning. Called OC Tuning and they had replacement battery ready to be installed within hours. Got my car back up and running. They also gave me a heads up that my coolant level was running low and to keep an eye on it. Great customer service, will be back for future work. read more

Thank you again Raz for doing an excellent installation job on the European Dynamic tail lights on My 2018 Golf R 7.5. Your attention to detail is much appreciated. I will definitely be back in the near future to do the APR intake and suspension work. read more

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The team at OC Tuning were SPECTACULAR! I have a 2012 Audi A7 with 100,000 miles on it. Check engine light came on so went to dealer who basically told me that car should be scrapped and would need over $15,000 to fix it. Through a good friend I found out about OC Tuning. Got the car to them and they did a full diagnosis. Yes I did need new fuel injectors and a couple of other items, but nowhere near what the dealer was asking for their repairs. When I got the car back it ran as if it was BRAND NEW! Really nice crew, very responsive to questions, and most importantly, they clearly know how to service German cars at a very fair price. Thrilled with Raz and the team at OC Tuning. They've got my business from now on because they are honest, extremely capable, and very responsive. Thanks OC Tuning! You saved me having to buy a new car :-). read more

Auto Union Tuning - 2012 Audi A7 - Auto Parts & Supplies Near Me - Placentia, California

My new shop that I fully trust, they do anything from oil changes to tunes. Nick is a easy guy to talk to and helped me a lot on getting everything sorted out, and Jimmy did a perfect job getting my fitment dialed. Nick was also on top of everything, as I was waiting for my car I noticed he was either running around or on a call, they are hard workers. 2014 Ford Fusion Hybrid read more

I had the distinct pleasure of chatting with and working with the owner Raz. My first impression from our initial phone call was incredible. Raz took the time to educate me on my car and the things to look out for when I was initially purchasing it. I ultimately came back to him to do some performance upgrades on my car and Raz was phenomenal in his service, his integrity, and attention to detail. He spent so much time ensuring that everything was perfectly set and I could truly tell how passionate he was about everything he did. Would recommend anyone to work with his company as they do incredible work. read more

I can't say enough good things about Raz and his team at OC Tuning. We've taken our 2015 Audi SQ5 for almost every service needed and have always been happy with their customer service and work. We first had oil consumption issues and the dealer tried to tell us we might need engine work that totaled close to $4000! After going to OC Tuning, Raz explained that these engines can consume oil but he tried a simple additive every oil change and we haven't had a problem since. Honest and good work everytime from their team. Thanks OC Tuning! read more

The actual shop, looks amazing, clean and professional work with honest owners. That's right that's the word I used honest. As a woman, I am always treated with the outmost respect and professionalism. I highly recommend this shop. read more

Auto Union Tuning - The actual shop, looks amazing, clean and professional work with honest owners. - Auto Parts & Supplies Near Me - Placentia, California

I was interested in getting an ECU upgrade/tune for my car. After researching online, I came across OC tuning. They had great reviews so I sent a message request through yelp for more information about the service. They promptly responded with all the information I needed. I called that same day and made an appointment for the next day. When I arrived, I was greeted quickly and politely. While getting the service paperwork started, the technician answered all my questions and was extremely knowledgeable. (Even about my specific model of vehicle) They even went above and beyond by inspecting my vehicle and making sure all hardware was up to specification. The service took less than an hour and I was back in my vehicle with outstanding results and power increase from the tune. These guys will definitely be my go to. read more

I met with Raz, to get a tune on my Audi. He is passionate and knows his stuff. This is the type of mechanic that is better described as a car surgeon. He's that passionate about the craft. read more

Long story short, I took my vehicle in for an alignment. Found out that I had installed hardware wrong while making upgrades in my rear suspension. I was charged $600 to replace the hardware, endlinks, and an alignment. Weeks later, that same "replaced" hardware broke (2 bolts that had been "replaced" from regular daily driving.) I emailed them video and pictures to see if they could warranty their work, they replied for me to bring it in. Was not told I would be charged $75 just to look at the problem which we all knew what it was. Gave me some B.S. about they didn't know if extra work needed to be done to extract the bolts. Left the vehicle as soon as they opened, told me I would be contacted in an hour, no call. Had to call them that afternoon to see what happened. Told me they would have to keep my vehicle over night. I was already upset, no way I was going to let them keep it again. Went to pick it up that afternoon, to never comeback. I had paid them to make sure all hardware was correct, they failed and attempted to charge me an extra $75 to look at something they had worked on already and should not of happened in the first place. They also failed on making things right and fixing the situation. They rather waste my time and money. read more

Could not be happier with the professionalism, knowledge and referral network that Raz connected me with. This is a wonderful resource for all of your performance needs and Tuning. The results were better than promised and way more than I expected! read more

Although their old Lake Forest shop was close to home, I didn't hesitate to bring my Passat to their new shop in Placentia. The attentive nature of the staff and quality of the work easily justified the longer drive. Raz was ready when I arrived a few minutes early, knew what needed to be done and got to work. The work and price matched the quote exactly. He took the time to go over areas that might need attention in the future, without trying to drive up the cost of the service. The work completed resulted in a noticeable improvement in performance, even during normal driving. There are many shops closer to me that specialize in servicing VW, Porsche and Audi but this place is worth the drive. read more

Excellent service provided. I've had a few things ordered and installed by them and all of it met my expectations!

Raz took care of me for a rotor & brake replacement on my Macan Turbo several months ago. Easy to work with and talk to. Very reasonably priced. Check with them on pricing before buying oem parts on your own, their pricing is great, read more

My first experience at OC Tuning was fantastic. I went in for a stage 1 tune on my GTI as well as some other minor repairs and I was out of there in a jiffy. They are trusted mechanics and offer great customer service. I highly recommend OC Tuning to anyone who might be interested. read more

Most knowledgeable guys in SoCal. I drive down Ortega highway to see them whenever my GLI needs service, flashing, and everything in between. Never felt like I was just a transaction for them and I appreciate that more than anything else. You guys have a lifelong customer. read more

These guys are amazing. They were able to fix my mk6 gti very quickly and at a fair price. Raz and Chris helped me through the whole process and are very experienced and helped answer all the questions I had for them. Definitely would recommend these guys and will be going back to them for my next service. read more

I've been going to their other store in HB(AU Tuning) but recently went here due to it being closer. These guys are great. I've been a customer of theirs for about 8+years and haven't had a bad experience. Raz is the man. Not only do they complete services requested, they also recommend other service for future reference. Wouldn't trust any other shop in working on my car read more

Was so thankful to see AU Tuning opened up a south OC location as I had some less than stellar experiences with another local VW shop. Have been here several times already for my APR tune, install of dynamic LED lights with coding and my 50K service just yesterday. These guys are awesome and I can't recommend them enough and will definitely be back shortly for more work. read more