Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
BST Trigger Logic
Triggering of the BST requires no additional sensors. The MRS II control module will trigger the BST as follows:
FRONTAL COLLISION: During a frontal collision that involves deployment of any front air bag, the BST will also be triggered
SIDE IMPACT: Depending on the severity of the side impact, the BST may also be activated.
REAR IMPACT: Detection of server rear impact will cause the MRS II to activate the seat belt tensioners and simultaneously activate the BST.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.