5 stars!! Cornerstone Auto has taken care of 2 of my vehicles the entire time I’ve been living in Oceanside (about 7 years now). The ownership has changed hands but the work, the staff, and the fairness in price is still very much the same. They make me feel like I’m part of a family and go the extra mile. You can tell they care about me, my dog and my car!!! Have an extended warranty? No problem, they will take care of you. Got a dealer quote for work to be done? They will beat it by at least half. They always squeeze me in no matter how busy they are and they are quick to get the job done!! I love how they are close to the San Luis Rey Bakery so you can drop your car off, have breakfast or lunch there, order some pastries and they will have your car ready to go when you get back. Seriously. Casey, their service writer and mechanic is TOP notch. I wouldn’t dream of taking my BMW anywhere else. Why even shop around? I’m telling you: I did the legwork for you and Cornerstone Automotive is where you want to take you car. I Promise.