Ignition Switch - 1991 300ZX Z32

The Nissan 300ZX Z32 platform relies on ignition switch 48750-40P05 (superseded to 48750-40P06) mounted to the steering column tube. This electrical switch bolts to the rear of the lock cylinder and provides the critical BAT-ST-IGN-ACC circuit sequencing. When junkyard hunting, target 1990-1996 300ZX units, though 1989-1994 Maxima and 1989-1998 240SX may share the NE038 casting—verify the 4-pin or 6-pin connector configuration against your harness. Common VG30DETT-specific failures include heat-damaged contact springs from turbo proximity and corrosion at the column harness junction. Before purchasing, test continuity across all positions with a multimeter; the switch should show <0.5 ohms resistance in START and RUN positions. Installation requires removing the lower column shroud (three Phillips screws) and releasing the white plastic lock tab while twisting the assembly 90 degrees counterclockwise. Never force the connector—early 1990-1991 models use a fragile brown 4-pin housing that cracks when brittle.