Method for exchanging a section (1a), in particular a damaged section, of a plastic component,
characterised by the following steps: separating the section (1a) from the plastic component (1); providing at least one connecting element (4a, 4b) made from a plastic; pressing the at least one connecting element (4a, 4b) onto the plastic component (1) in such a way that the at least one connecting element (4a, 4b) abuts a remaining part (1') of the plastic component (1); oscillating the connecting element (4a, 4b) by means of an ultrasonic sonotrode; and welding the connecting element (4a, 4b) to the remaining part (1') of the plastic component (1); providing a replacement section (5) for the separated section (1a), wherein the replacement section (5) comprises a hole, in particular a through-hole (6a); applying the replacement section (5) in the region from which the separated section (1a) was separated, in such a way that the replacement section (5) is clamped by its hole directly in a form-fitting and/or force-fitting manner onto the connecting element (4a, 4b) and/or the connecting element (4a, 4b) extends at least some way through the through-hole (6a), wherein a clip element (7a) is clipped onto a section of the connecting element (4a, 4b) extending through the hole, wherein the clip element (7a) projects beyond the through-hole (6a) and connects the replacement part (5) to the remaining part of the plastic component (1) in a form-fitting and/or force-fitting manner.