J.C. Whitney JRN51040001 Power Steering Pump V6 4.0L Without Reservoir

The J.C. Whitney JRN51040001 is a direct OEM replacement power steering pump engineered for Nissan V6 4.0L applications. Designed as a brand-new unit (not remanufactured), this pump restores proper hydraulic assist pressure for smooth, responsive steering. It ships with the pulley included but without reservoir, making it a straightforward swap for the factory unit.

Key Features:

• Brand New Construction — Not remanufactured; built to OEM fit and performance standards
• Pulley Included — Comes complete with pulley for direct bolt-on installation
• Reservoir Not Included — Reuses existing reservoir; replace separately if needed
• Inlet Connection: 16mm push-in fitting
• Outlet Connection: M16×1.5 threaded male port
• Corrosion-Resistant Housing — Aluminum construction with upgraded seals for long-term durability under high pressure
• OEM-Standard Hydraulic Testing — Each unit tested for quiet, smooth operation before shipping

OEM & Cross-Reference Part Numbers:

• Nissan OEM: 491109CA0A, 49110EA200, 49110-9CA0A, 49110-EA200, 49110-ZL80A
• Aftermarket Cross-References: 21-5451, 96-05451, 9605451, PSP0003, 5894N, 990-0749

This power steering pump is the correct replacement when experiencing symptoms such as steering wheel stiffness, whining or groaning noises, slow steering response, or power steering warning indicators. Professional installation is recommended; after installation, bleed the system by turning the steering wheel lock-to-lock several times with the engine off, then repeat with the engine running.