I'm searching the part number of the motor for the 6-way power seat (AG1) the motor for the back and forth motion.
Can anybody tell me witch one is the correct one?

 

I've attached pages from the parts manual that should provide what you are looking for. It gives the individual motor and complete assembly parts numbers.

 

Perfect! Thank you!
Now, is there any difference between #22138358 and #16606971 ?

 

If you look at the parts descriptions, #16606971 has a round housing and is made by a different supplier. Other than that, the parts manual doesn't give any other information that can be used to tell if they would interchange.

 

Finally took the time to take a closer look at this. I wasn't aware that the motor can be seen with the seat still bolted on and even the part-# on the side of the motor...

Next thing is that the number on my motor doesn't match with any of those in the manual. On mine is written #16734978 and looks more like the one with the flat surface on top and bottom so I might give this one a try and order one.