A sensor system for a crush protection device is disclosed. The system monitors an agitation of a vehicle part with a sensor. The sensor is arranged to detect an object being crushed between an active vehicle part and a body section or another vehicle part. The sensor has a layered formation. The sensor is applied on the active vehicle part and either or both of the body section of the vehicle and the additional vehicle part. Additionally, the sensor is adjusted to the shape of the active vehicle part and either or both of the body section and the additional vehicle part.