Auto Union Tuning

mag dawis

★★★★★

6 months ago

The guys at Auto Union are the best. They are very knowledgeable about my car. I drive from Corona just to get my car serviced. I’ve recommended to friends and family. If you need your Porsche, Audi, and Volkswagen serviced this is the place to go. Raz and Nick and the whole Crew is Awesome.

Michael Bandy

★★★★★

2 weeks ago

Best shop around. Fast, friendly, efficient, and reasonably priced. I bring my VW here for everything needed.

Calum Ragan

★★★★★

5 months ago

After having multiple terrible experiences at my dealer, I took my car to AU Tuning. Raz and Nick were amazing and helpful in every way. I always felt welcome and never felt like they were trying to convince me to get more work done that I didn't need. I was looking for a new permanent mechanic that I could trust and I think I found my home in AU Tuning!

Avi Garikiparthi

★★★★★

3 months ago

They have been taking care of any problems I've had and worked through some really ugly situations with some of my cars. Their patience and commitment to always giving the best service while genuinely caring about the work isn't common. Would recommend to anyone.

Matthew Kuraoka

★★★★★

3 months ago

Been bringing all of my different VW’s here over the years and have all my friends and family doing so now too! Nick and Raz as well as the rest of the team are honest, fairly priced and are true experts in their craft.

Nico Monge

★★★★★

2 months ago

Absolutely love coming here These guys take great care of my cars Report to carfax and stand by their work

George Hassapis

★★★★★

a month ago

It is truly rare to find craftsmen that stand 100% behind every aspect of the work they do. THIS is that kind of shop. These are those kinds of people. If you care about your vehicle and want to maintain it to maximize its lifespan, value and performance, you really owe it to yourself and your vehicle(s) to have them serviced here.

Gilbert Jalomo

★★★★★

a month ago

What a great shop with great people! Took my S3 for some maintenance and while waiting they were more than happy to answer all of my questions concerning this new platform to me. If you’re on the fence, just give them a call!

Ethan Owen

★★★★★

6 months ago

AU Tuning is a remarkable business. My father and I have been coming here for over a decade and it is worth a hefty drive to get to the shop. Their customer service is fantastic and the service is amazing. I always leave satisfied and their prices are very reasonable. I have shops in my area that are way easier to get to, but I will always choose the long drive to come to these guys instead because of the caliber of their work and the friendly faces. Fantastic tuner shop, and I cannot recommend them enough!

Wyatt Wilkinson

★★★★★

4 months ago

First-time Audi owner... and I wanted to get an exhaust installed along with a new splitter and diffuser. I told Nick I was completely new to the world of modifying cars, especially Audis, and he couldn’t have been more helpful. He took the time to walk me through my options, explain everything clearly, and help me choose what made sense for my setup and goals. The communication throughout the process was top-notch. While my car was in the shop, they kept me in the loop with progress updates and photos, which I really appreciated. When I picked it up, the splitter and diffuser looked phenomenal, and the exhaust sounded exactly how I wanted it to... deep, clean, and not over the top. I’ll definitely be coming back to AU Tuning as I keep exploring the tuning world. Highly recommend these guys if you’re looking for honest advice, great work, and solid communication.

2Car Garage

★★★★★

3 months ago

I brought my Chevelle here for a dyno tune and I couldn’t be happier. They took the time that was needed to update my efi and got an amazing amount of t of power out of my big block while ensuring it would run safely. I will definitely be back, great shop, great people

Danielle Davies

★★★★★

3 months ago

I have been bringing my all my audis throughout the years to AU tuning. They are the only ones I would ever trust to take care of my baby!! They run a top notch business lead with integrity, commitment to excellence, and are just all around nice guys. I cannot say enough great things about AU Tuning. I highly recommend!

Christopher Elkin

★★★★★

2 months ago

Was recommended by another shop. I loved it, they gave the car a thorough inspection. They sent me a report with each item listed, pictures, and a quote. It was like a menu at a Mexican restaurant. You pick which items you want repaired. They posted their priority on the items that needed immediate attention. They stayed in Contact until the car was repaired. Will highly recommend!! Raz was great!

Peter Phan

★★★★★

a year ago

I had a great experience with this team, who were very professional and prompt with their recommendations and timeline. They worked with me over the course of two weeks to address several upgrades for my vehicle. I wanted to replace my brake pads with options that produce less dust, install wheel spacers, and lower my vehicle using KW H.A.S. adjustable springs. They recommended the iSweep 1500 brake pads, which have been excellent for my needs. The reduction in dust has been remarkable; my rims haven't been touched in over a week, and they still look clean. The installation of the KW adjustable springs went perfectly, and the team was very accommodating, adjusting my vehicle's height two additional times after the installation to ensure it met my preferences. I initially had concerns about needing adjustable camber control arms for the front, but they were honest with me and advised against it, explaining that the difference would be too minor. I truly appreciate their honesty and the quality of work they provided. I will definitely be a returning customer for any future vehicle needs.

Mandel Cipolla

★★★★★

Edited a month ago

A U Tuning did an excellent job on my Mk6 Golf R. Engine is running smooth. I had haldex, and the front differential fluid changed. Also had a new air filter installed on my neuspeed pflow intake and new spark plug’s installed. I truly appreciate all the help with all my cars over the years. Thank you to everyone at A U, appreciate all the good work.

Gerrie Cruz

★★★★★

2 months ago

I have been going to Auto Union Tuning since 2011 when I purchase my first new Audi, an A3. Since then, I have followed them from facility to facility and now to their newest facility in Placentia, CA. The fair prices initially drove me in, but I stayed loyal due to their honesty, professionalism and their excellent customer service. It takes me just under 2 hours to get to their shop and another 2 hours to get back home, but its more than worth it for me. From my 337GTI all the way to my R8GT, they have me covered. Here is a pic of my 2012 Audi R8GT:

Zaid Darvesh

★★★★★

3 weeks ago

I had an excellent experience at Auto Union Tuning and couldn’t be happier with the service. I brought my 2015 VW GTI in for some maintenance and inspection, and the team was extremely knowledgeable and transparent from start to finish. They took the time to explain everything clearly, answered all my questions, and never tried to upsell anything unnecessary. The work they performed made a noticeable difference — the car drives smoother, shifts feel sharper, and overall it feels like a completely refreshed drivetrain. You can tell they really understand German cars. What stood out the most was their honesty. They pointed out a few things that may need attention in the future but were very clear about what was actually necessary right now versus what could wait. That kind of transparency is rare and really builds trust. If you own a VW, Audi, or any German vehicle and want a shop that knows what they’re doing, communicates well, and treats your car properly, I highly recommend Auto Union Tuning. I’ll definitely be coming back.