Sensor installation system for a vehicle, comprising: - a fastening device for a surround sensor of a vehicle, comprising: ■ a sensor holding device having a receptacle region, in which at least regions of the surround sensor are arrangeable when the surround sensor is fastened to the sensor holding device as intended, ■ a holding spring device which is configured to hold the surround sensor by way of a spring force, for the purpose of fastening said surround sensor in the receptacle region as intended, ■ wherein at a first end the holding spring device comprises a bearing element by means of which the holding spring device is rotatably mounted on the sensor holding device, and ■ at a second end opposite to the first end the holding spring device is releasably fixable to the sensor holding device, for the purpose of fastening as intended; and - a surround sensor arranged in the receptacle region of the fastening apparatus, wherein the sensor holding device of the fastening apparatus and the surround sensor comprise corresponding alignment elements, which serve for preventing errors during the assembly of the surround sensor and ensure the fastening as intended by means of a poka-yoke principle; characterized in that - the corresponding alignment elements are formed by ■ two alignment pins and two corresponding alignment openings, and ■ three alignment stops and - together with the holding spring device of the fastening apparatus, the corresponding alignment elements restrict a movement of the surround sensor relative to the sensor holding device in three mutually perpendicular spatial directions. - a fastening device for a surround sensor of a vehicle, comprising: ■ a sensor holding device having a receptacle region, in which at least regions of the surround sensor are arrangeable when the surround sensor is fastened to the sensor holding device as intended, ■ a holding spring device which is configured to hold the surround sensor by way of a spring force, for the purpose of fastening said surround sensor in the receptacle region as intended, ■ wherein at a first end the holding spring device comprises a bearing element by means of which the holding spring device is rotatably mounted on the sensor holding device, and ■ at a second end opposite to the first end the holding spring device is releasably fixable to the sensor holding device, for the purpose of fastening as intended; and ■ a sensor holding device having a receptacle region, in which at least regions of the surround sensor are arrangeable when the surround sensor is fastened to the sensor holding device as intended, ■ a holding spring device which is configured to hold the surround sensor by way of a spring force, for the purpose of fastening said surround sensor in the receptacle region as intended, ■ wherein at a first end the holding spring device comprises a bearing element by means of which the holding spring device is rotatably mounted on the sensor holding device, and ■ at a second end opposite to the first end the holding spring device is releasably fixable to the sensor holding device, for the purpose of fastening as intended; - a surround sensor arranged in the receptacle region of the fastening apparatus, wherein the sensor holding device of the fastening apparatus and the surround sensor comprise corresponding alignment elements, which serve for preventing errors during the assembly of the surround sensor and ensure the fastening as intended by means of a poka-yoke principle; characterized in that - the corresponding alignment elements are formed by ■ two alignment pins and two corresponding alignment openings, and ■ three alignment stops and ■ two alignment pins and two corresponding alignment openings, and ■ three alignment stops - together with the holding spring device of the fastening apparatus, the corresponding alignment elements restrict a movement of the surround sensor relative to the sensor holding device in three mutually perpendicular spatial directions.