My mom and I were taking a road trip up to Sedona for the first time when I ended up hitting a metal object in the middle of the road. I heard a loud "pop" noise and saw something fly up in the rear view mirror thinking it was a part that came off my car. We pulled over asap and assessed the damage...but couldn't find anything wrong. Thinking we got lucky, we got back on the road but the sound my car was making was horrendous. We knew the car had been damaged and needed to be looked at immediately. I pulled up Yelp and found something in a 5-mile radius that was open. We came across Cornerstone Automotive and booked it there fast! I'm so happy we came across Cornerstone because the object I hit ended up making a huge hole in my exhaust pipe and needed to be repaired. It took about an hour to get the part to fix the hole and Jeff and his team did an amazing job. They were super knowledge, friendly, and fast!! Of-course coming from California, I was expecting a big bill, but I was only out $100. My car ended up driving (and sounding) even better than before I came to Cornerstone. It rides so much more smoother on the road. I couldn't be happier with the service we received and recommend this place to anyone who is driving in this area and need their vehicle serviced. Thanks again Jeff, Goldie, and the rest of the Cornerstone team for saving our car...and our trip! read more

If your looking to pay a place to fuck up your vehicle and not take accountability then this is your place but if you want the job done right go somewhere else this place was a big waste of time and money , would never recommend this shit hole read more

New to the area and BEYOND pleased to fine an honest local auto shop! It feels perfectly down-home-small-town friendly and attentive. Fair is all respects of price and timeframes for work. Happy to bring all 4 of our vehicles to Jeff and his family team for various repairs, tuneups and such. Thanks to you all for being here for BCC! So glad to give you all the business we can. read more

Stay away from this place, they do not stand behind there work. I have been taking my car to them for years but something has change with these people there workmen ship left me stranded in San Diego, CA on a Saturday afternoon only had a view hours to get my car repaired or would have been forced to stay two more night in a hotel, Upon returning home they refused to stand behind there repair and remburse me for their poor workman ship. STAY AWAY FROM THIS PLACE read more

Growing up with a father who was a professional mechanic I got rather spoiled on the reality of fixing cars. Moving out west it's up to me to find and pay for mechanic work. My truck is getting up there in miles and years and not running as great... not wanting to trade it in quite yet I need to find a fair and honest mechanic. Cornerstone seems like the most reliable and decent business. They will give you general advice and fair price quotes. I really would trust them with all my truck troubles....and not have that gut wrenching feeling of being ripped off or something :) read more

For the price my car should be completely fixed. Yeah Sam and Jeff will get the job done, but everything is double or triple the price it should be unfortunately which is just a let down when you need an important part to run your car and the money is more important than your safety and you cant afford it. I would give them more stars but after years of being over charged when I'm already poor its an awful wrong thing to do to poor people or rich we all work hard for money. read more

Not a surprise to read the other reviews after my serendipitous encounter with Jeff and crew. The axle of my Prius went out while driving from Chicago to Southern California for a new job. After pulling off the first available exit, I found Cornerstone right down the street. They took me, my mom, and my dog in right away, offered us seats in their office, and diagnosed the problem quickly. While waiting for the part, we made connections and had meaningful conversations with all four employees working that day. This place cares about the people who work there, cares about the people (and dogs!) they serve, and cares about the cars they service. The kicker, when I put down the sun visor as I drove away, a Hallmark card fell out that wished me good luck on my new job from the crew. When does a mechanic ever bring you to tears in a good way? read more

A++. I don't usually write reviews but I was compelled after having a phenomenal experience today. My husband and I ran into a little car trouble driving from Phoenix to Prescott. They were easy to see after driving off the freeway to check on our car. We called first and they were able to help us right away. As it was an unexpected trip and we had our two small children in the car, they looked at our issue right away and even recommend a nice little place to eat across the street. They had us back on the road again safely in no time. What would have be a stressful experience ended up being a happy detour. They were very friendly, knowledgeable, and we'd highly recommend them. read more

We had taken one of our cars into this shop to have the starter replaced. When we went to pick up the car we discovered massive electrical issues that weren't there when the car was dropped off. Windows no longer roll up or down, AC system no longer works, wipers no longer work, radio won't power up. Absolutely amazing with a fairly simple task everything else could of been destroyed. Somehow the mechanic managed to short out the electrical system and screwed things up beyond repair. Disconnecting the battery is a simple process that even a beginner mechanic should know. Now this mechanic has cost us tons of money trying to get the car diagnosed at another facility. We were told that this could possibly cost well over a $1000 without any guarantee of getting the problem resolved. Would I recommend this shop. No No No No No! In case I didn't say it correctly....NO, Never! read more

Best mechanic we have used. Honest and reasonably priced. Took the time to troubleshoot an issue we had for years and researched it to find the real solution. We will continue to use him for all our auto service needs. read more

We have been on a road trip and had a HUGE problem come up and we randomly stopped by and they were great. Helped us with a quick diagnostic and got us back on the road quick! read more

My family and I were traveling with our travel trailer when our suburban broke down. Roadside assistance took us to Cornerstone Automotive, late at night. I met up with them first thing in the morning and they ran a diagnostic on the suburban and found a couple of issues. While they ended up not fixing the issues, not because they could not, but, it would have required a lot of time and a lot of money and I did not have the time, they gave me great information about what was most likely wrong with my vehicle, they helped me with a good plan to get my car home AND, they told me that I did not owe them anything, as they did not feel as if they did enough for me. Then, when I called them back, after I got home, I requested the codes they had found during the diagnosis and they remembered me, were very courteous, very helpful and got me the codes and they did everything in a very, VERY timely manner. If you find yourself in need of mechanical work in or around the Black Canyon City area, I highly recommend Cornerstone Automotive! Service: Check engine light diagnostic The profile from Ettor S was me, but, I am not from California! read more

I have personally known Jeff and Sam for 15 years now. They are the most honest mechanics you could ask for. They will not try and sell you something you don't need, they will just get you back on the road in the most economical, yet reliable manner possible. I cannot stress enough how quickly they respond to customer requests, it seems like every time I call for help they are on the ball. Cornerstone Automotive, Jeff and Sam, you guys rock! Keep up the good work. read more

Had some long term campers truck breakdown the morning before they were scheduled to depart back to Minnesota.. Called Cornerstone Automotive in Black Canyon City, (as they came highly recommend) right away that morning and We were told they would send a mechanic that afternoon to check it out!! No one showed up and not even a courtesy call from them that afternoon nor the next morning to explain that they were not able to keep their appointment!! Very Very Poor Customer Service!! That to me is definitely not the way to run a business!! Will not be recommending Cornerstone Automotive to anyone ever!! There is no excuse, in my opinion to ever treat customers in this fashion!! Especially elder persons that were in desperate need of some kind help!!! Disappointed and angry does not even begin to describe how upset I am at how these poor folks have been treated by this company!!! read more