High performance modification service near Tarzana, CA

A.G. Automotive and Diagnosis offers a 12 month, unlimited mileage warranty on all repairs. Factory trained Master technician's, ASE certified Master technician's will fix your vehicle right the first time at a fair price. Our experienced staff uses the latest tool's and equipment to diagnose, service, and repair your vehicle so you can drive with confidence. Don't take our word for it, stop by or call to schedule an appointment today, and see how taking your vehicle for service doesn't have to be a dreaded experience.

Some of the best auto service I have ever received! I would highly recommend going here for any repairs! Fair prices & genuine service to top that! I will drive far and wide to receive for the experience I had here!

Great for getting a Mercedes Service A.

Great work, they charged me hundreds less than the dealership! Nice showroom and friendly guys in the office.

First and foremost Sean is really good at fixing cars!! He knows his stuff. His way of explaining the mechanics makes me feel at ease because I can actually follow. Though his auto mechanical IQ is as strong as anybody else's, it's Sean's integrity and laid-back professionalism that sets him apart in his industry. Sean will NEVER make you feel like your being taken advantage of and He will always tell you the truth...always. Also, his prices are extremely reasonable. I have been using Sean for several years and will continue to do so. I recommend him to anyone.

We went through 3 different mechanics including the Mercedes Service Department before going to Gold Star. Mike diagnosed the problem with no charge, and his findings were very accurate. We had spend close to $2000 fixing what wasn't even the issue, even Mercedes charging us 280 for diagnosis still couldn't fix the issue. I am so happy and grateful to Mike, he was so generous, professional, experienced, and courteous, we've finally found an honest and extremely experienced mechanic. I will recommend Gold Star to all my friends and family. I rate Gold Star a 10!!!!!!!

Great staff. Great attitude. Great work. Extremely competitive pricing. Wont take my cars to anyone else if I can avoid it. -Sam Rhodes

My first visit for maintenance after my Mercedes warranty expired. The experience was overwhelmingly positive. Herbert has a professional calmness that exudes knowledge and confidence. You are immediately aware that you and your car are in good hands. Herbert's fees are fair and he will tell you exactly what your car needs- and perhaps more importantly, what your vehicle does not need. I am very pleased that I trusted Herbert with my C300 sport package AMG, and expect to return for any and all future service needs. sincerely, Stan Kelley

Please remove this place from any shop in LA horrible niggle be stealing everyones cars lol !!!! CROOK ALERT

My charger rides so good after the tune-up they gave me, I had a very long drive so I decided to get a tune-up first, so glad I did! They do amazing work!

I have been searching for a shop for my BMW after working with some duds!!! CS Motorwerks is by far the best and most honest BMW shop to work with! I wouldn't bring my BMW anywhere else.

We were referred to Mitch at Schneider's Auto Repair by a family member who has had nothing but good things to say about them. We have taken our cars to Schneider's for the past couple years and have received excellent service from them. The customer service department was extremely courteous to us each and every time. I have referred friends and family to them and will continue to do so!

Kevin was very courteous and helpful. Very satisfied so far. Had used Gio in 2015 and was very happy with his work.

I am well pleased with the work performed on my truck! Eddie was real nice and gave me good pricing! Along with my engine rebuild( replaced cracked heads) I received a 2year 24000 mile warranty! I live in San Diego and would refer all my family and friends including you! Happy Motoring! Jack

20+ years I've lived in Los Angeles and have had my Benz worked on far and wide. If I had only known Kevin at MZB West. By referral I have taken several cars to him and my own and have always left feeling satisfied and relieved. Satisfied because the quote is always itemized AND prioritized and relevant. Relieved because his work is thorough, quick, and very reasonable. Fact is the only way you will know this is to go. Thanks for your work Kevin.

I've taken my car to German car service a few times now and worked with David. I recommend going here for service on your German car. You have to take these cars to experts you can trust and the dealership is often packed and very pricy. These guys are great with my Audi repairs and maintenance.

As a new resident to LA, West Coast Tire was very helpful in fixing my tire that was under road hazard warranty from another shop out of state. I worked with Joe primarily, who was very quick, always answered my calls, and was very friendly. He made sure everything was right before I pulled out of the lot. I will definitely go back to West Coast again.

I had a vintage car (92' 500 SL) with over 200K miles.The technology on older cars are so different compared to the newer cars.Gabriel is fantastic at trouble shooting and zeroing in on exactlywhat was needed on my little car ... he is generous with his time and expertise.I love his European work ethics, qualified technicians, clean shop and his comfortable, stylist waiting area

AWESOME SERVICE!! I worked with John and he got the job done fast, all while trying to find ways to help me save some money since this repair was out-of-pocket for me!! It can be really daunting trying to find a car place you can trust to get the job done in a timely matter and not rip you off in the process. SO THANKFUL I WENT TO THEM!!! Recommend 110%!! -Sarah