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Openai/6940b2df-db80-8003-b707-4cc5cbedf6d9
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==== 2οΈβ£ BATTERY SAFETY TERMINAL (BST) β CRITICAL INSPECTION POINT ==== The BST is mounted directly on the positive battery terminal. Its job is to pyrotechnically disconnect the battery in a crash. ===== OEM BST PART (if replacement is needed) ===== BMW OEM Part #: 61129198305 Description: Battery Safety Terminal (BST) with positive clamp ===== π¨ WHEN YOU MUST REPLACE THE BST ===== Replace it if ANY of the following are true: * Cracks in the plastic body * Melted or heat-deformed housing * Loose internal terminal * Evidence of arcing or burning * Airbag/SRS fault referencing BST * Battery clamp no longer tight at 5 Nm β οΈ A failing BST can cause: * Intermittent no-start * Voltage drop at ignition ON * Random module resets If your positive cable was overheating, the BST was exposed to that heat β inspect it closely. ===== β WHEN YOU MAY REUSE THE BST ===== You may reuse it only if: * Housing is intact * Clamp tightens evenly * No heat discoloration * No SRS/BST fault codes * Voltage drop test passes If you want zero risk β replace it while everything is apart.
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