Hitachi WUP0001 Engine Water Pump

Hitachi WUP0001 Engine Water Pump

The Hitachi WUP0001 engine water pump is an actual OE-grade replacement built for select Nissan cooling system applications. It is listed with a gasket and cross-references OE part number 21010-86G00 for the same application.

Key Features

• Engine water pump for the cooling system
• Actual OE grade for factory-style fit and function
• Includes gasket
• Manufacturer: Hitachi
• Part number: WUP0001

Vehicle Fitment

• Fits 1998-2004 Nissan Frontier, N/A
• Fits 2000-2004 Nissan Xterra, N/A

Product Details

Hitachi WUP0001 is an engine water pump for Nissan Frontier and Nissan Xterra applications covering model years 1998-2004 and 2000-2004. This OE-style cooling component is used to circulate coolant through the engine and radiator, helping maintain stable operating temperature in daily driving and under load. If you are replacing a worn Nissan Frontier water pump or servicing a Nissan Xterra cooling system, WUP0001 provides a direct-fit service part reference for the listed applications.

Common Replacement Reasons

• Coolant leakage from the pump housing or seal area
• Overheating caused by reduced coolant circulation
• Noise from a worn pump bearing
• Cooling system service during timing or belt-related maintenance
• Restoration of factory cooling performance on listed Nissan models

Installation Notes and Tips

Verify engine application and OE number before installation. Clean the mounting surface thoroughly, inspect the cooling system for contamination, and replace the gasket supplied with the pump during assembly. After installation, refill and bleed the cooling system according to Nissan service procedures.

Quality Assurance

Hitachi supplies OE-grade replacement components, and this water pump is cataloged as Actual OE for the listed Nissan Frontier and Xterra applications. Part number WUP0001 is referenced for direct application matching.