Pump, in particular for a fluid 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 a motor chamber;
• and an impeller disposed in the pump chamber that is driven by a rotor arranged in the motor chamber, the rotor having a rotor shaft and a rotor body through which the rotor shaft is guided,
• wherein the rotor has through holes that directly interconnect a space of the motor chamber on a first side of the rotor with respect to an axial direction of the rotor shaft and a space of the motor chamber on a second side of the rotor with respect to the axial direction of the rotor shaft, and
• wherein all of the through holes are provided in a region of the rotor outside the rotor shaft, wherein one or more of the through holes, which interconnect the space of the motor chamber on the first side of the rotor and the space of the motor chamber on the second side of the rotor, are at least partially bounded by the rotor shaft,
• wherein the space of the motor chamber on the first side of the rotor and the space of the motor chamber on the second side of the rotor are provided outside of a through hole of the rotor body in which the rotor shaft is arranged, and
• wherein the housing has an annular chamber which surrounds a stator.