- The crash sensors' purpose is to measure how quickly the vehicle slows down in a frontal crash, or is crushed in a side-impact crash, and send those signals to the Electronic Control Unit (ECU).
- Crash sensors for frontal crashes can be located in the front of the vehicle near the engine or in the passenger compartment, sometimes in the ECU.
- Crash sensors for side-impact crashes can be located in the ECU, in the door, in the doorsill or in the pillar between the front and rear doors.
- Severe or panic braking alone cannot cause sufficient force to deploy an air bag.
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