Functional component comprising a - component suitable for a front end module carrier, a seat structure, a door system, a fuel tank housing, a vehicle underbody structure, an underride guard, a structural component for battery systems or a battery housing, the component comprising a flat reinforcement component with a first stiffness and at least one flat attachment made of an attachment material with a second stiffness, the first stiffness being higher than the second stiffness, wherein the planar reinforcing component has an upper and lower side and the attachment is connected at least to the upper or lower side of the planar reinforcing component in a first partial region of the planar reinforcing component, wherein the at least one attachment has a channel connected by a material bond, which connects the attachment to the edge of the planar reinforcing component and is applied to a second partial region of the planar reinforcing component, and that the component comprises a flat edge material, wherein the composition of the flat edge material corresponds to the composition of the attachment material, wherein the reinforcement component has a first end on a first narrow side and the edge material has a second end divided into two strips (800, 900) on a second narrow side, and the two strips (800, 900) of the second end enclose the first end on both sides in an enclosure region, the planar reinforcing component has at least one aperture from the top to the bottom of the planar reinforcing component, wherein the at least one planar attachment covers the at least one aperture; characterized by - a functional component (7, 8), wherein the functional component (7, 8) or a portion of the functional component (7, 8) is provided in the opening and is sealed off from the wall of the opening by the attachment material of the attachment. - component suitable for a front end module carrier, a seat structure, a door system, a fuel tank housing, a vehicle underbody structure, an underride guard, a structural component for battery systems or a battery housing, the component comprising a flat reinforcement component with a first stiffness and at least one flat attachment made of an attachment material with a second stiffness, the first stiffness being higher than the second stiffness, wherein the planar reinforcing component has an upper and lower side and the attachment is connected at least to the upper or lower side of the planar reinforcing component in a first partial region of the planar reinforcing component, wherein the at least one attachment has a channel connected by a material bond, which connects the attachment to the edge of the planar reinforcing component and is applied to a second partial region of the planar reinforcing component, and that the component comprises a flat edge material, wherein the composition of the flat edge material corresponds to the composition of the attachment material, wherein the reinforcement component has a first end on a first narrow side and the edge material has a second end divided into two strips (800, 900) on a second narrow side, and the two strips (800, 900) of the second end enclose the first end on both sides in an enclosure region, the planar reinforcing component has at least one aperture from the top to the bottom of the planar reinforcing component, wherein the at least one planar attachment covers the at least one aperture; characterized by wherein the planar reinforcing component has an upper and lower side and the attachment is connected at least to the upper or lower side of the planar reinforcing component in a first partial region of the planar reinforcing component, wherein the at least one attachment has a channel connected by a material bond, which connects the attachment to the edge of the planar reinforcing component and is applied to a second partial region of the planar reinforcing component, and that the component comprises a flat edge material, wherein the composition of the flat edge material corresponds to the composition of the attachment material, wherein the reinforcement component has a first end on a first narrow side and the edge material has a second end divided into two strips (800, 900) on a second narrow side, and the two strips (800, 900) of the second end enclose the first end on both sides in an enclosure region, the planar reinforcing component has at least one aperture from the top to the bottom of the planar reinforcing component, wherein the at least one planar attachment covers the at least one aperture; characterized by - a functional component (7, 8), wherein the functional component (7, 8) or a portion of the functional component (7, 8) is provided in the opening and is sealed off from the wall of the opening by the attachment material of the attachment.