Pump, in particular for a liquid circuit in a vehicle

A pump for a fluid circuit in a vehicle, the pump comprising:

• a multi-part housing that has a pump chamber;
• and
• an impeller arranged in the pump chamber;
• wherein a pump housing and a further housing part of the multi-part housing bound the pump chamber,
• wherein the pump housing and the further housing part each have a flange with a flange surface that rest against one another,
• wherein one of the two flange surfaces has at least one annular groove and the other of the two flange surfaces has at least one circumferential web, which engages in the annular groove,
• wherein a wall of the pump housing that bounds the pump chamber in a radial direction is provided with recesses that open in an axial direction toward the further housing part, and wherein each of the recesses have different dimensions from one another, and
• wherein the flange of the pump housing and the flange of the further housing part each have at least one through hole, the at least one through hole of the pump housing being aligned with the at least one through hole of the further housing part and wherein a screw engages in the at least one through hole of the pump housing and the at least one through hole of the further housing part to connect the pump housing and the further housing part together.