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System Components: Actuators: BST

If the MRS detects an impact of sufficient severity, the safety battery terminal is deployed. When this happens, the starter/alternator cable is electrically and mechanically disconnected. The alternator is deenergized. The safety battery terminal is located directly at the positive terminal of the battery.

Fig 1: Identifying BST
G03399729Courtesy of BMW OF NORTH AMERICA, INC.