BBB Industries 990-0638 Power Steering Pump

Reman Power Steering Pump for Nissan and INFINITI

BBB Industries Reman Power Steering Pump 990-0638 is a remanufactured steering pump built for select Nissan Pathfinder and INFINITI QX4 applications. It features an aluminum housing, a single pipe-style inlet with M8x1.25 thread size, and a threaded M16x1.50 outlet for a direct-style hydraulic connection.

This BBB Industries Reman Power Steering Pump line focuses on remanufactured OE-style replacement components for hydraulic steering systems. Part number 990-0638 is specified for non-reservoir style power steering pump applications and uses a press-on pulley attachment with remote reservoir setup.

• Remanufactured power steering pump
• Aluminum housing for the pump body
• 1 inlet with pipe attachment and M8x1.25 thread size
• 1 outlet with threaded M16x1.50 connection
• Press-on pulley attachment type; pulley not included
• Remote reservoir configuration
• 4 mounting holes
• No filter, reservoir cap, reservoir, or sensor included

Detailed Product Description

BBB Industries 990-0638 is a reman power steering pump for 2001-2004 Nissan Pathfinder and 2001-2003 INFINITI QX4 models listed with non-reservoir style power steering pump applications. The aluminum housing and threaded outlet connection support hydraulic steering system service where the original pump has worn, leaked, or lost assist. This part cross-references 19319331 for the same application.

Use this pump when servicing a Nissan Pathfinder or INFINITI QX4 power steering system that requires the specified inlet and outlet thread sizes, four mounting holes, and remote reservoir configuration. The part number 990-0638 should be matched to the vehicle’s original pump layout before installation.

Common Reasons for Replacement

• Loss of power steering assist
• Noise from a worn or failing pump
• Hydraulic fluid leakage at the pump body or connections
• Steering effort that becomes heavy or inconsistent
• Replacement for a damaged or non-functioning original pump

Installation Notes and Tips

Confirm the vehicle’s original pump style, inlet and outlet thread sizes, mounting-hole count, and remote reservoir arrangement before installation. Inspect hoses, seals, and fluid condition during service, and verify pulley fitment since the pulley is not included. For best results, flush the steering system if contamination or pump failure is present.

Quality Assurance

BBB Industries remanufactured steering components are rebuilt to meet application-specific replacement needs for hydraulic power steering service. Part number 990-0638 is a remanufactured unit intended for direct replacement in the listed Nissan Pathfinder and INFINITI QX4 applications.