I was happy with the work I have had done here, until one day i was driving on 405 and lost power to the engine. I was able to make it to the carpool lane on 405 but broke down there. Sat there with my hazards on , trying to restart my car. Waiting for the state troopers in the carpool lane, praying I did not get rear ended by drivers traveling over 70 mph. Getting rear ended at that speed...bad things could have happened for many people. I took my car to another mechanic who inspected the vehicle and told me whoever put in the battery connected it incorrectly which led to the connection from the battery to the engine shaking loose, leading to the power loss. Graham Auto Repair did this battery installation. I am thankful no one was hurt, but this situation is absolutely unacceptable. These are very nice people but putting my life in danger, and that of my child, because of a careless mistake is unforgivable. Leaving this shop with a vehicle that is safe....i'm sorry to say my trust in that has been completley shattered.