Flexible seat shaft part number
928.521.252.04 (same for both side)
When the power seats fails to move forward and backward in
a 993 it is most likily either a bad switch or a stripped flexible drive shaft. This
DIY will focus on how to replace the flexible drive shaft.
(1). Remove the two philips screw that holds the cover the
covers the drive motor in front of the seat.
(2). Remove the drive shaft clip from the motor
(3). Slide the plastic wrap along with the flexible drive
shaft cable out of the motor drive mechanism
(4). Remove the drive shaft clip that secures it to part
of the frame of the seat.
(5). Pull the plastic sleeve out and the shaft out of the
seat drive gear box on either side
(6). Install the new shaft and line it up
with the motor drive gear, you may need to tap on the power seat switch to get the square
notch to line up while you install the shaft to the motor. When installing the shaft
to the seat's drive gear make sure that it is pluged all the way in, you may even want to
turn the shaft with your fingers to make sure it is mounted correctly before attaching it
to the motor.