Vehicle cooling system , in particular for a railway vehicle, - with a fan device for generating a cooling air flow along a main flow direction , - with a fan housing for guiding the flow of cooling air generated by the fan device , - with a flow chamber formed by the fan housing through which the cooling air flow generated by the fan can flow, - with a cooling air/cooling fluid heat exchanger through which cooling air flow can flow for cooling a cooling fluid, which can flow through the cooling air/cooling fluid heat exchanger in the form of a cooling fluid flow fluidically separated from the cooling air flow, - with a support device arranged on the cooling air/cooling fluid heat exchanger for arranging the fan device in the flow chamber , - wherein the support device forms a receiving chamber , - wherein the fan device is arranged at least partially inside the flow chamber , - wherein the fan device has an impeller and a drive motor for driving the impeller , - wherein the fan device is arranged on the support device so that the drive motor is arranged at least partially in the receiving chamber and the impeller is arranged outside the receiving chamber , - wherein the support device for transmitting the weight force of the fan device is arranged to transmit the weight force exclusively at the cooling air-cooling fluid-heat exchanger , characterized in that , - an expansion tank system for the cooling fluid is formed which has a plurality of separately formed individual expansion tanks , which are fluidically connected to one another by means of cooling fluid lines and are distributed in circumferential direction and are arranged spaced apart from one another on the outside of the fan housing , - the cooling air/cooling fluid heat exchanger is arranged downstream of the fan device with respect to the main flow direction of the cooling air flow. - with a fan device for generating a cooling air flow along a main flow direction , - with a fan housing for guiding the flow of cooling air generated by the fan device , - with a flow chamber formed by the fan housing through which the cooling air flow generated by the fan can flow, - with a cooling air/cooling fluid heat exchanger through which cooling air flow can flow for cooling a cooling fluid, which can flow through the cooling air/cooling fluid heat exchanger in the form of a cooling fluid flow fluidically separated from the cooling air flow, - with a support device arranged on the cooling air/cooling fluid heat exchanger for arranging the fan device in the flow chamber , - wherein the support device forms a receiving chamber , - wherein the fan device is arranged at least partially inside the flow chamber , - wherein the fan device has an impeller and a drive motor for driving the impeller , - wherein the fan device is arranged on the support device so that the drive motor is arranged at least partially in the receiving chamber and the impeller is arranged outside the receiving chamber , - wherein the support device for transmitting the weight force of the fan device is arranged to transmit the weight force exclusively at the cooling air-cooling fluid-heat exchanger , - an expansion tank system for the cooling fluid is formed which has a plurality of separately formed individual expansion tanks , which are fluidically connected to one another by means of cooling fluid lines and are distributed in circumferential direction and are arranged spaced apart from one another on the outside of the fan housing , - the cooling air/cooling fluid heat exchanger is arranged downstream of the fan device with respect to the main flow direction of the cooling air flow. <EOS>