TL;DR: The motor vehicle pump device has a pump wheel drive shaft (11) that forms an operating fluid channel (12) and axial recess (13) and a radial recess (14, 14').
Abstract: The motor vehicle pump device has a pump wheel drive shaft (11) that forms an operating fluid channel (12). The operating fluid channel is provided for cooling a motor vehicle pump device component. The pump wheel drive shaft has an axial recess (13) and a radial recess (14,14').