Pacifica brake problems

I own a 2005 Pacifica that has gone through 2 sets of front rotors and pads, all at no cost to me. I am now over 36K miles and the problem is back as well as a new one. I'm sure the rotors either need cut or replaced. The new problem appears to be a bad sensor on the front passenger side brake. Is replacing the sensor a costly garage job or can I do it myself ?? Has anyone else had these problems ?? and if so, how did you fix them ? I really like the car but these brake issues are troubling.

Any help will be greatly appreciated

Are you refering to the antilock sensor? or speed sensor? I'm not positive this will cause the issue you're having,Perhaps the fluid is boilin or becoming very hot for whatever reason. Or are your calipers sticking intermitently? check more before going with the sensor route.