Only the left side of the drivers side seat moves when you try to adjust the seat forward or backward

Its either a problem with the switch or the motor.

make sure nothing is lodged under the tracks this is common things get thrown under the seat and stops them in the track

sounds like you might have a switch problem if the memory for seat position works ok. If you have a multimeter that checks for continuity then you could start there at the switch but you would also need a wiring diagram for the seats

there is a cross over wire under the seat that runs the other side.It may have become diconnected.If that is not the problem you can check the owners manual for a fuse

On ABS light most common problem is ABS control module , they failing left and right.
As for the seat adjustment , sound like you need a new seat switch.

Unfortunately you need a new seat track assembly. I'm an infiniti tech and have replaced MANY of these tracks.

I have a 2005 Jeep Liberty and the smae lever that tilts the seat also moves it forward and back. Press forward or back on the switch. Also check for blown fuse or a loose wiring connector under the drivers seat. Good luck, Techjoel

is look like a fuse blowen you need to replace it look in the munual book

There are plastic gears connecting the track to the seat assembly. Whne one of these strip the seat will only work or move to one side. Infiniti does not sell a simple fix. You are looking at buying an entire seat assembly complete with the module for all the electronics. It will be at a cost of around $950 - $1000. Once that is in, Infiniti must program the seat to the brain of the car, only then can you reset your memory settings.

Good day;
What year is you car? Does the other controls work for the seat? and just to clarify the seat won't go forward of back?


Cheers