
General Auto Repair & Diagnostics
From check-engine lights to everyday repairs, we diagnose the real problem and explain it before we touch your car.
Honest auto repair, family run
Nico and the Cornerstone team fix it right the first time, at a fraction of dealership prices.

Services

From check-engine lights to everyday repairs, we diagnose the real problem and explain it before we touch your car.

We rebuild and replace transmissions with a warranty backing the work, so you're covered long after you drive off the lot.

Regular service to keep your vehicle running reliably, without the add-on charges you'd get pushed at the dealership.
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The truth about your car, fixed right the first time.
Our story
Cornerstone Automotive is a family run shop in Oceanside, run by Nico and his dad. When something is wrong with your car, we tell you exactly what needs fixing and skip the pressure to add on extra work you don't need. If a part failed, we'll show it to you or walk you back to the shop floor so you can see the repair for yourself.
Most repairs are finished the same day, or by the next morning at the latest, and our prices come in well below what you'd pay at the dealership for the same work. When we replaced a customer's transmission with a rebuilt unit, we backed it with a warranty that carried them the rest of their time in California and all the way home across the country.
Customers keep coming back, some for four years and counting, because they know our team will tell them the truth about their vehicle every time.
What customers say
“Great auto shop in Oceanside. I have been bringing my two vehicle here for the past 4 years, and I continue to be impressed. Nico is very professional, courteous, and informative. The team is extremely honest, they will tell you what needs done and not a bunch of add ons to try and get more money from you.”
“This shop was great to work with. Ask for Nico, probably one of the most approachable and friendly mechanics I've ever met. He was incredibly honest and did exactly what I asked and didn't try to oversell me any work I didn't want but gave great advice.”
“One of the best customer services I've ever dealt with. Nico troubleshot problems for me and offered different solutions. Also fixed things on the spot and kept me in the loop the whole time. His Dad is awesome and helped me out too.”
Serving Oceanside.
3965 Mission Ave 7 Suite 7, Oceanside, CA 92058, USA
3965 Mission Ave 7 Suite 7, Oceanside, CA 92058, USA
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