Originally Posted by joeli16

I think you are talking about the arm that connects to the wipers and the wiper motor.If it goes bad,go to a junkyard and get another one from a B14 sentra.Take the wiper blades and wiper blade arms off.Then take off the plastic panel underneath the wiper blade arms.You have to open your doors to get to one bolt that holds this plastic panel.
After you remove the panel,you can see the wiper connecting arm you are talking about.Use a pry bar or something similiar to pry off the plasitc joint where it connects to the motor.Then,just take all the bolts out,and there you go,switch it out.DO NOT use a hammer.
I replaced mine one because the plastic joint in this arm was so worn,it fell off and the driver side wiper quit on me.