Which device is attached to the reinforcement bar of the front bumper and activates airbags upon impact detection?

The crash sensor is designed to detect the forces involved during an impact. When a collision occurs, this device senses the rapid deceleration and transmits a signal to the airbag control unit. The primary purpose of the crash sensor is to determine if the forces exceed a predetermined threshold, which would warrant the deployment of airbags to protect the occupants of the vehicle. By being attached to the reinforcement bar of the front bumper, it is ideally positioned to assess frontal impacts effectively.

While options like impact sensor, collision detection module, and airbag control unit may sound relevant, they serve slightly different functions or may not be specifically positioned to detect the initial impact in the same way that a crash sensor does. The crash sensor's role is critical in the immediate response to impact, ensuring that safety measures, like airbag deployment, are enacted swiftly to protect occupants during an accident.