driver's side front seat switch broken. How do I replace it? on 2000 Nissan Maxima

The seat switch is a 4-way; clockwise, counter clockwise, forward and back. All work except back. The seat has been moved up 3 times, and won't go back. Now it's like driving a sprint car. Much too close for me to be comfortable driving it. What is ;the proceedure for changing it?

Asked by for the 2000 Nissan Maxima