Steering Rack Assembly - 1991 300ZX Z32

The Nissan Z32 generation 300ZX relies on a hydraulically assisted rack-and-pinion steering assembly, with primary OEM reference 49001-40P00 superseded to service number 49001-40P0A. When junkyard hunting, 1990-1996 model years interchange broadly, but verify whether the donor was a 2-seater or 2+2 chassis—outer tie rod lengths differ significantly, though the rack housing itself remains physically compatible between VG30DE and VG30DETT variants. Turbo models often feature distinct mounting bracket geometry and hydraulic line routing despite shared castings; inspect the pinion housing for TRW manufacturer codes which outlast Nissan's supersession chains. Installation demands either subframe lowering or careful navigation past the dense twin turbo plumbing; always replace the 54477-40P00 rack bushings during service, as these rubber components typically degrade before internal gear failure. Common failures include pinion seal leakage and excessive lash from worn bearings; bench-test for smooth travel through full lock and verify no fluid weeping from the bellows before purchase.