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BMW Tech and Performance
Engine Tech
Restraint Systems warning / Battery Safety Ignitor
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<blockquote data-quote="moots" data-source="post: 720013" data-attributes="member: 219"><p>BST = battery safety terminal.</p><p></p><p>The MRS sends a signal to the ignitor capsule during collisions to blow the gas discharge tube and push the tapered B+ cable contact point to behind the spring tabs to prevent further connection.This is a safety overkill by BMW to prevent fire in a collision by disconnecting the battery from the car's circuit.</p><p></p><p>I think you have to replace the bst and cable as a unit.Or you can try jiggling the whole assembly and see if the message disappears.</p><p></p><p>I have not come across this issue.</p></blockquote><p></p>
[QUOTE="moots, post: 720013, member: 219"] BST = battery safety terminal. The MRS sends a signal to the ignitor capsule during collisions to blow the gas discharge tube and push the tapered B+ cable contact point to behind the spring tabs to prevent further connection.This is a safety overkill by BMW to prevent fire in a collision by disconnecting the battery from the car's circuit. I think you have to replace the bst and cable as a unit.Or you can try jiggling the whole assembly and see if the message disappears. I have not come across this issue. [/QUOTE]
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