If the motor is turning but just not moving the seat, then the power seat motor gear is bad and the whole power seat assembly would have to be inspected. (yourmechanic.com)
The last thing would be to check for voltage at the affected seat motor and continuity of the thermal protection circuit. (yourmechanic.com)
The two bucket seats in the back each recline, and have an easy in - out feature whereby the front seats motor forward 10 - inches and the back seats follow 4 - inches, making entry through the long doors more dignified. (slashgear.com)