An apparatus (1) for regulating at least one fluid flow in a vehicle (5), having a first fluid regulation unit (20), in particular a pump or a valve, for regulating a first fluid flow, and a first holder (20) with a receiving region (22) for the first fluid regulation unit (10) and with a first fastening means (28), wherein the first fluid regulation unit (10) is arranged in the receiving region (22) of the first holder (20), and wherein the first fastening means (28) is provided for fastening the holder (20) to the vehicle (5). The first holder (20) has at least one connecting means (26) for connecting the first holder (20) to a second holder (70).