Disclosed is an integrated component, being used for a vehicular thermal management system, comprising a connection portion (10) and a liquid storage portion (20). The connection portion (10) and the liquid storage portion (20) are connected and form an integrated whole. The integrated component (100) has a liquid storage cavity (30). The connection portion (10) has channels, said channels including a first channel (111) and a second channel (112). The first channel (111) and the second channel (112) are provided independently. The first channel (111) comprises a first inlet (1111) and a first outlet (1112), a working medium entering the first channel (111) from the first inlet (1111) and leaving the first channel (111) through the first outlet (1112). The liquid storage cavity (30) can be in communication with the second channel (112). The second channel (112) comprises a third outlet (1121), a working medium that passes through the liquid storage cavity (30) leaving the second channel (112) through the third outlet. The connection portion (10) has an installation base, the installation base being in communication with the first channel (111) or the second channel (112), such that a valve apparatus in the thermal management system can be disposed at the installation base. The installation base and channels are provided at the connection portion such that multiple interfaces enable the assembly between the integrated component and the vehicular thermal management system, thereby facilitating the assembly of the integrated component and simplifying the assembly technique.