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.
Battery Safety Terminal (BST)
The Battery Safety Terminal (BST) is technically identical to the one used in MRS systems.
If the ISIS system detects a crash of sufficient severity, the ignition stage of the BST is triggered by the B-pillar satellite, right (SBSR).
A small quantity of solid fuel electrically and mechanically cuts the starter and alternator line from the positive terminal of the battery. This prevents possible short circuits in the engine compartment.
A separate vehicle electrical system connection through the Power Module ensures that the remaining vehicle circuit retains its function when the BST is triggered.
This ensures the operation of all the important functions such as lights, hazard warning lights, telephone emergency call, etc.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.
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