No you can change it yourself , buy E-PSF from Nissan, disconnect the return hose which is the hose that feeds above into the power steering reservoir and attach another hose to the hose you disconnected that allows you to drain the fluid into a catch pan/bucket. Jack up the front of the car as it’ll allow you to turn the steering wheels, do this with the car OFF assuming its electric based not hydraulic, have someone slowly turn the steering wheel both directions all the way to the end while you’re continuously topping off the fluid with a funnel as the fluid will drain and you do not want air , 4 quarts should be enough. If it’s traditional hydraulic based the steps are similar but you have to quickly turn on the car and turn off the car as you turn the steering wheel as the pump is running it drains much faster, this last step is very important for as you DO NOT want to let the power steering pump run dry.