In November 2025 I took my 07 nissan 350z into this shop because I started have idle issues. The car would shutter as if it wanted to shut off. The car would still would idle within spec. They diagnosed it said let's start with a spark plug ,throttle body cleaning and throttle relearn. These services would cost over 700 dollars. I agree to the services. 2 weeks later I pick up my car to a undrivable surging idle. The car is reving up and down on its own. I pay for the services he provided, spark plug and throttle body cleaning. It cost me over 500 dollars. The mechanic said some one else was working on the car. I've owned the car for about three years and done nothing but oil changes and brakes. Took my car to so cal Z in Colton and the diagnosed it top to bottom and said your 1st problem was a simple vacuum leak. Then your 2nd problem was damaged throttle bodies and your 3rd problem is 2007 nissan 350z ecu is very fussy and will need to get sent off to be reprogrammed. Picked up the car 2 weeks later. The car is still has a high idle but much closer to spec gave it some time for the ecu to relearn. Performed a couple throttle relearns on my own and the car is back to normal. Now the biggest problem I have here is that im out of 3000 dollars for a simple vacuum leak read more

Went to have my car inspected and they did it for free and answered all of my question, great service and great people thank you so much for your help!! read more

Needed a little transmission work on my 2011 F350 4WD. Called this shop because it was close and had a good rating. I felt they were knowledgeable, and felt it was a good choice. Got an estimate over the phone and after the work was done it was the same price. Very impressed with the work and the respectfulness, and honesty. Thank you! I'll be back and I'm recommending you to my friends. read more

I 1000% recommend this place .... No funny business here .This is the second time I come to this establishment. The first time was for wheel bearing problem and it got fixed perfectly and was charged a decent amount. I did go there again for another problem that was solved. Yardly and his father are very friendly and this is my go to place . Ladies no need to be scared of being ripped off . read more

Great shop, great prices. Called around for quotes and most places charge far more than this place does. Our new go-to shop in Moreno Valley! read more

Quick, fast, honest. Very rare for mechanics . They did the same work to my other vehicle. They didn't remember me so it gave me the opportunity to check their honesty. They passed the test. read more

If you looking for a great mechanic Diaz is where you need to go! Jesse, his wife Carmen and son Yardi are so nice! Their work is awesome! They are not like other me mechanics trying to take advantage of you! They are family and treat you like you family as well! read more

These people are TRULY amazing people. This is a family owned business. My family and I were coming from Fullerton, CA on our way home to Arizona. We were on the road for about an hour and a half. Our car started shaking, then the check engine light went out. We immediately took our vehicle to auto zone. They tested it, said it was a certain piece. My hubs bought the piece/parts. My husband called 3 or 4 places and he got very ridiculous rates for a job so small that was only going to be about 10 minutes to fix. My husband found Diaz Auto online/Yelp. He called and spoke to a very nice lady, he told her we already have the part for it, he asked how much she said do not worry just come in, we will take great care of you. They offered my family and I water, soda and chips. As soon as we got there we felt VERY welcomed. I have major trust issues with trusting mechanics. If y'all come here you will be very satisfied. We wish they were in Arizona near us. Thank you for helping our family, we were able to get back on the road, we drive another 4.5 hours at made it home safely. read more

Saved my butt in a surprise emergency. My car started not to function correctly while I was on the freeway. Found these guys with their good reviews and excellent service record. Went to them and they did not disappoint. I have a basic car knowledge, and they were so kind to quickly help me with a diagnostic as well as fixing the main problem. So grateful I found these guys fair prices with above and beyond customer service. This is for sure the place to go. read more

Diaz Auto Mechanic - Business card - Auto Repair Near Me - Moreno Valley, California

Great service! I had a power steering leak and Diaz was able to diagnose and fix the issue in under an hour. He explained and showed me everything. Highly recommended! read more

2nd time around at the shop for fuel filter maintenance and they change my diesel fuel filters with no problem.... Good reliable trustworthy mechanic you can trust!! read more

One of the best car mechanics that I have met here in the inland empire. Very honest and straightforward, even tried to fix a part on my car to save me money. Work was done professionally and will be going back. read more

Great service. I highly recommend this place. My GMC truck was not starting and another mechanic had mentioned I was in need of a new engine. I appreciate the honesty I got from the owner and he provided me with a great quote and explained in detail what the problem was and fixed my truck promptly. I like their service and recommend them 100%. read more

Great service. I came in with a quote from another business for a full suspension replacement and a an axle. Found out that I didn't need an axle PLUS got the work done in less time and about 400 dollars cheaper. read more

Families own and father and son are very knowledgeable and straight forward. Go above and beyond and will diagnose everything in details. Highly recommended and A A A plus service. I drop my wife bmw off and he offer me a ride back home while my wife car was in the shop getting done. Who does that to peoples not most mechanic I tell you that much. I'm very satisfied with his work on my wife car and I will bring any future repairs to Mr. Jesse. You guys are amazing peoples and I highly recommended peoples come to this shop first before any body. 100% trust worthy. read more

Great spot and excellent service i dropped off truck for routine oil change, I used long life oil and changed my spark plugs. It was easy and very good price. It's a new shop and very clean. Certainly this is my go to for car repairs. read more

Diaz Auto is family owned and operated. Saturday before the Super Bowl, afternoon about 2:00 pm my car started overheating out of nowhere. I called Diaz Auto, they said to bring it right in. I was greeted by Yardley who is part of the family ownership. From the start he was straight-forward, courteous, and professional. I got a call right before they closed around 4:45 pm with a full diagnostic of what the problem was, as well as an accurate price to fix it. Since they're closed on Sundays I presumed I'd pick it up on Monday. In actuality, the whole family stayed a couple hours after closing to finish working on my car and I had it back in my driveway by 8:30 pm. Absolutely solid service. I will go to them again if the need arises without hesitation. Additionally, they are more than fair in regards to pricing as well. Family owned and operated, excellent service, excellent pricing. This place is great and they will absolutely take great care of you. Thank you Diaz Auto! read more