Seat belt buckle switch (driver)

Via the seat belt buckle switch, the MSA can detect that the driver has fastened his or her seat belt. If the driver has not fastened his or her seat belt, the MSA reacts as follows:

• With the engine running, a switch-off inhibitor is set.
• With MSA stop, the MSA is disabled. A restart is possible using the START-STOP button.
  Fig 1: Identifying Seat Belt Buckle Switch

  Courtesy of BMW OF NORTH AMERICA, INC.