My Pathfinder does not have a power steering cooler. I saw a small cooler mounted in front of the A/C condenser on a 3.3L Pathfinder at the local junkyard. Presumably it is for the transmission, it might even be aftermarket. For the $5 I'd pay for the cooler and some hose, and maybe even a Magnefine filter down the road, would a power steering cooler be worth it? I'm not sure how hot my PSF gets. Current fill is Genuine Nissan PSF, about 6 months old. Fluid still looks and smells in good condition.