Carrier/rack problems of the 2001 BMW 330

While entering the freeway I heard a pop from under my car and immediately began to hear a loud metallic scraping sound coming from under my car as if I were dragging something. I immediately pulled off the freeway and found the metal bracket that holds the gas tank on the passenger side had come loose from an area where it had been spot welded to the underside of the car. This effectively caused the gas tank to lower itself a few inches off the ground. I had to have it towed to my home as it was unsafe to drive.