Installation unit

The invention relates to an installation unit for a carrier element of a carrier unit that is arranged on a body of a motor vehicle, comprising a housing having a first housing portion that, on a first outer side, is supported against a receiving region of the carrier element, and a second housing portion that engages in a receptacle in the receiving region of the carrier element, and a fixing unit that, when the installation unit is mounted in the receptacle, is supported against the receiving region, wherein, when the installation unit is fixed on the receiving region, the fixing unit is connected to the housing, in particular to the second housing portion.