A bracket unit for holding a vehicle sensor, the bracket unit comprising a bracket and a metal wire spring, the bracket comprising - a bracket plate, - at least one bracket holder part (2a, 2b), - at least one bracket hook part (2h, 2i), and - at least one bracket latch part (2d, 2e, 2f, 2g), wherein the at least one bracket holder part (2a, 2b), the at least one bracket hook part (2h, 2i), and the at least one bracket latch part (2d, 2e, 2f, 2g) being integrally connected to one side of the bracket plate, the metal wire spring comprising an elongated body with an essentially circular cross-section, the body comprising - at least one spring hinge part, the spring hinge part being rotatably attached to the bracket holder part (2a, 2b), - at least one spring bar part (3h, 3i), and - at least one spring latch part (3d, 3e, 3f, 3g), wherein the bracket unit provides a vehicle sensor receiving position and a vehicle sensor fastening position, - in the vehicle sensor receiving position, the spring bar part (3h, 3i) is positioned between the bracket hook part (2h, 2i) and the bracket plate such that the spring latch part (3d, 3e, 3f, 3g) and the bracket latch part (2d, 2e, 2f, 2g) are positioned for receiving the vehicle sensor, wherein the metal wire spring is positioned in a relaxed state, and - in the vehicle sensor fastening position, the spring latch part (3d, 3e, 3f, 3g) and the bracket latch part (2d, 2e, 2f, 2g) are fastened onto the vehicle sensor, wherein the metal wire spring is positioned in an urged state. the bracket comprising - a bracket plate, - at least one bracket holder part (2a, 2b), - at least one bracket hook part (2h, 2i), and - at least one bracket latch part (2d, 2e, 2f, 2g), wherein the at least one bracket holder part (2a, 2b), the at least one bracket hook part (2h, 2i), and the at least one bracket latch part (2d, 2e, 2f, 2g) being integrally connected to one side of the bracket plate, - a bracket plate, - at least one bracket holder part (2a, 2b), - at least one bracket hook part (2h, 2i), and - at least one bracket latch part (2d, 2e, 2f, 2g), wherein the at least one bracket holder part (2a, 2b), the at least one bracket hook part (2h, 2i), and the at least one bracket latch part (2d, 2e, 2f, 2g) being integrally connected to one side of the bracket plate, the metal wire spring comprising an elongated body with an essentially circular cross-section, the body comprising - at least one spring hinge part, the spring hinge part being rotatably attached to the bracket holder part (2a, 2b), - at least one spring bar part (3h, 3i), and - at least one spring latch part (3d, 3e, 3f, 3g), wherein the bracket unit provides a vehicle sensor receiving position and a vehicle sensor fastening position, - in the vehicle sensor receiving position, the spring bar part (3h, 3i) is positioned between the bracket hook part (2h, 2i) and the bracket plate such that the spring latch part (3d, 3e, 3f, 3g) and the bracket latch part (2d, 2e, 2f, 2g) are positioned for receiving the vehicle sensor, wherein the metal wire spring is positioned in a relaxed state, and - in the vehicle sensor fastening position, the spring latch part (3d, 3e, 3f, 3g) and the bracket latch part (2d, 2e, 2f, 2g) are fastened onto the vehicle sensor, wherein the metal wire spring is positioned in an urged state. - at least one spring hinge part, the spring hinge part being rotatably attached to the bracket holder part (2a, 2b), - at least one spring bar part (3h, 3i), and - at least one spring latch part (3d, 3e, 3f, 3g), - in the vehicle sensor receiving position, the spring bar part (3h, 3i) is positioned between the bracket hook part (2h, 2i) and the bracket plate such that the spring latch part (3d, 3e, 3f, 3g) and the bracket latch part (2d, 2e, 2f, 2g) are positioned for receiving the vehicle sensor, wherein the metal wire spring is positioned in a relaxed state, and - in the vehicle sensor fastening position, the spring latch part (3d, 3e, 3f, 3g) and the bracket latch part (2d, 2e, 2f, 2g) are fastened onto the vehicle sensor, wherein the metal wire spring is positioned in an urged state.