I was the driver and I stopped at a traffic light. I leaned over toward the passenger seat and the driver‚Äôs seat belt came loose from the fixed attachment point at the driver door side of the seat. The seat belt tensioner was recently replaced at the local BMW dealer. There was no warning or other indication that the seat belt anchor point was not secure. I am taking the vehicle back to the dealer for repair on Monday, June 20. Whether this is a manufacturing, assembly or repair issue is unknown. However, there was no advance warning and the seat belt suddenly was rendered useless, which is an unacceptable safety risk in the case of an accident, regardless of whether it is a manufacturin...