Front Left Wiper Arm - 1990 300ZX Z32

The front left wiper arm on the 1990 Nissan 300ZX (Z32) is a die-cast aluminum component with integral spring tensioning that presses the blade against the curved glass. When sourcing replacements, prioritize finding 28881-40P00 or its supersession 28881-40P01 from 1989-1996 donor cars, as these interchange across all North American Z32 variants including the twin-turbo and naturally-aspirated models. At the junkyard, inspect the 15-spline bore for wallowing and check the spring anchor boss for cracks—common failure points after 30 years of thermal cycling. The arm mounts via a 14mm tapered nut to the transmission linkage; always scribe the sweep position before removal to avoid blade interference and motor strain upon reinstallation. Note that JDM Fairlady Z models utilize right-hand drive specific arms with reversed park positions, making them incompatible with USDM left-hand drive applications. Test the tension spring: if the arm flops loosely without blade attached, the internal torsion spring has fatigued and the assembly should be rejected regardless of cosmetic condition.