Delphi FP10406 Fuel Injection Pressure Regulator

Fuel Pressure Control for Nissan Applications

The Delphi FP10406 fuel injection pressure regulator is built for precise fuel system control in select Nissan and INFINITI applications. With OE-based engineering and a metal body, it supports stable fuel pressure delivery for drivability and consistent injector performance.

Compatible With 1989-2006 Nissan 240SX, D21, NX, Maxima, Sentra, Pathfinder, and INFINITI I30 and QX4 applications. This Delphi FP10406 regulator is a direct-fit style replacement for vehicles that require a 44 psi system pressure specification.

Key Features

• Fuel injection pressure regulator for air and fuel delivery systems
• Metal construction for durable fuel system service
• Push-in inlet with hose outlet for OE-style routing
• Bolt-mounted design for secure installation
• Single inlet and single outlet configuration
• Fixed-pressure design with 44 psi system pressure
• No gauge port and non-adjustable setup
• Delphi OE heritage informed by 100 years of supplier experience

Detailed Product Overview

Delphi FP10406 is engineered for fuel injection systems that require regulated pressure at 44 psi. The regulator uses a push-in inlet, hose outlet, and bolt mounting arrangement, with inlet and outlet port sizes listed at 11.0 mm and 9.0 mm respectively. Its metal construction supports dependable fuel pressure regulation in applications such as Nissan Sentra, Nissan Maxima, Nissan 240SX, Nissan Pathfinder, Nissan D21, Nissan NX, INFINITI I30, and INFINITI QX4.

This part cross-references Beck/Arnley 158-0333 and Gates 21880 for the same application. The Delphi FP10406 is a practical OE-style replacement when the original regulator is no longer maintaining consistent fuel pressure.

Common Issues This Part May Address

• Hard starting caused by unstable fuel pressure
• Rich or lean running from incorrect fuel delivery pressure
• Fuel pressure loss after shutdown
• Rough idle or hesitation under acceleration
• Fuel system performance problems tied to a worn regulator

Installation Notes and Tips

Verify the inlet and outlet port style, mounting type, and 44 psi system pressure before installation. Confirm vehicle-specific fuel line routing and regulator location on the fuel system. For best results, inspect related fuel hoses and connections for wear or leakage during replacement.

Quality Assurance

Delphi builds aftermarket parts using OE heritage and knowledge developed through long-term supplier experience with major automakers. That background is reflected in the FP10406 fuel injection pressure regulator for Nissan and INFINITI fuel system service.