Battery Safety Terminal (BST)
WARNING: This page does not describe the selected car, but rather 151 other vehicles, including the 2006 BMW X5, 2006 BMW M3, 2006 BMW 330Ci, 2006 BMW 325Ci, and 2005 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.
The BST is designed to disconnect the battery from the starter, generator and B+ terminal in the engine compartment during collisions. This passive safety component is designed to reduce the possibility of short circuits to ground occurring from these high amperage circuits.
However, other systems that require power to function during and after a crash continue to receive power from the positive battery post. These circuits include:
- ABS - provides continued operation if the vehicle is still in motion.
- MRS II - remains operational for crash protection.
- General Module - for unlocking the vehicle and interior light activation.
- Lamp/Check module - for hazard warning light activation.
- Telephone - provides communication after the crash.
- Board Monitor - with navigation system for communication with Cross Country Group for assistance.