look on the passenger side, it is located in between the door and the dash. there should be a triangular shaped panel on the side of the dash that will pull off with a little effort and the bcm is about a 4inch by 5inch black box with numbers on it. if you are replacing it, the numbers MUST match on the replacement bcm. i just replaced one today on my sister-in-law's car. If one has theft and the other doesn't, the car will not start.