I had a 2007 Honda Civic SI, the battery would die overnight and I had to jump start it every morning. I took it to Firestone for an inspection and was informed it needed a new power steering unit and a complete air conditioning assembly replacement as both were draining my battery overnight, the cost being approximately 3,808.00 to repair! I declined and informed them I did not even pay that much for the car! I went on YouTube and searched for the problem. It turned out to be a bad relay that I replaced myself for fifteen dollars and the vehicle ran perfectly fine after. Always get a second opinion! Even if you have to have it towed, it's worth it in the long run…