Electronic coolant pump comprising a pump housing defining a pumping chamber being filled with a coolant during pump operation, with a radially inner pump inlet, a radially outer pump outlet and a pump volute extending from downstream of the pump inlet to the pump outlet, and a motor chamber being fluidically separated from the pumping chamber by a separation sidewall extending substantially in a radial plane, an electric motor with a rotatable motor rotor, a static motor stator with a single compact stator coil arrangement being arranged laterally with respect to the motor rotor in the motor chamber so that all stator coils of the stator coil arrangement are arranged on the same side of the motor rotor and a motor electronics being arranged in the motor chamber for energizing the stator coil arrangement, wherein the stator coil arrangement is arranged axially adjacent to a volute cooling sector of the pump volute and is in thermal contact with a cooling section of the separation sidewall being defined by the volute cooling sector, and a pump wheel being arranged in the pumping chamber and being co-rotatably connected with the motor rotor, characterized in that the cooling section is made of a material with a thermal conductivity higher than 10 W/(m.K), and the volute cooling sector of the pump volute starts at the pump outlet and ends at a volute angle of 120° starting at the pump outlet and running in a pump-inlet-facing circumferential direction of the pump volute. a pump housing defining a pumping chamber being filled with a coolant during pump operation, with a radially inner pump inlet, a radially outer pump outlet and a pump volute extending from downstream of the pump inlet to the pump outlet, and a motor chamber being fluidically separated from the pumping chamber by a separation sidewall extending substantially in a radial plane, a pumping chamber being filled with a coolant during pump operation, with a radially inner pump inlet, a radially outer pump outlet and a pump volute extending from downstream of the pump inlet to the pump outlet, and a radially inner pump inlet, a radially outer pump outlet and a pump volute extending from downstream of the pump inlet to the pump outlet, and a motor chamber being fluidically separated from the pumping chamber by a separation sidewall extending substantially in a radial plane, an electric motor with a rotatable motor rotor, a static motor stator with a single compact stator coil arrangement being arranged laterally with respect to the motor rotor in the motor chamber so that all stator coils of the stator coil arrangement are arranged on the same side of the motor rotor and a motor electronics being arranged in the motor chamber for energizing the stator coil arrangement, wherein the stator coil arrangement is arranged axially adjacent to a volute cooling sector of the pump volute and is in thermal contact with a cooling section of the separation sidewall being defined by the volute cooling sector, and a rotatable motor rotor, a static motor stator with a single compact stator coil arrangement being arranged laterally with respect to the motor rotor in the motor chamber so that all stator coils of the stator coil arrangement are arranged on the same side of the motor rotor and a motor electronics being arranged in the motor chamber for energizing the stator coil arrangement, wherein the stator coil arrangement is arranged axially adjacent to a volute cooling sector of the pump volute and is in thermal contact with a cooling section of the separation sidewall being defined by the volute cooling sector, and a pump wheel being arranged in the pumping chamber and being co-rotatably connected with the motor rotor, characterized in that the cooling section is made of a material with a thermal conductivity higher than 10 W/(m.K), and the volute cooling sector of the pump volute starts at the pump outlet and ends at a volute angle of 120° starting at the pump outlet and running in a pump-inlet-facing circumferential direction of the pump volute. the cooling section is made of a material with a thermal conductivity higher than 10 W/(m.K), and the volute cooling sector of the pump volute starts at the pump outlet and ends at a volute angle of 120° starting at the pump outlet and running in a pump-inlet-facing circumferential direction of the pump volute.