GET a 2ND OPINION BEFORE HAVING WORK DONE HERE! I've been a customer at Sewell since 2003 when I purchased my car there. I've been bringing my car in for regular service/oil changes ever since. A couple of weeks ago I brought my car in for a regular oil change and was told that I had valve and cam leaks that would cost $1500 to repair. I told them because it was such a high-cost repair that I would bid out the repairs.
I did a lot of research to find a repair shop that had great reviews (I chose MasterTech in Plano) and took my car into them for a 2nd bid/opinion. When I dropped it off they said they are seeing more and more people who are coming in for a 2nd opinion after dealers (including Sewell) have told them work needs to be done only to find out the car is fine. They said if the work does need to be done, their cost for the same repairs was $900. Sure enough, my car was fine and MasterTech returned my keys and car at no charge.
I was shocked. Sewell's 'Customer For Life' policy has clearly been abandoned. Due to this betrayal of trust, I will never take my car there again and I advise anyone reading this to avoid them as well.