This is a long shot but I cant find a definitive answer to this. I have a G37s coupe RWD with no rear active steering. Does anyone know the differences in steering racks between the adaptive and non adaptive rear steering cars? I had a steering rack put in a while ago and the steering has never seemed quite right since, is very twitchy and small adjustments to the wheel don't seem to center or spring the steering wheel back when letting go so the car feels all over the place at times and I'm constantly adjusting the steering wheel. I found the part number for the rack that was installed while I was changing my oil, which is a MAVAL brand and the part number comes back for G37 cars WITH rear active steering but the manufacturer doesn't list a rack for a G37 one without. I'm just wondering if there is a difference that may cause my "issues" Mine is the bottom one Infiniti equivalent 49001-JL07A

They only list 2 racks for the RWD G37 coupe which is:

Application Info: Infiniti G37 (2009-13), Q60 (2014-15) ***W/O Sport Tuned Suspension***

Interchange: Nissan - 49001-JL06A

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Application Info: Infiniti G37 (2008-2009) ***W/Rear Active Steering***

Interchange: Nissan - 49001-JL07A