Delphi FP10412 Fuel Injection Pressure Regulator

Fuel Pressure Control for Toyota Applications

The Delphi FP10412 fuel injection pressure regulator is built for Toyota fuel systems that require stable pressure control and OE-style fitment. It is a metal regulator with a push-in inlet, hose outlet, and bolt-on mounting design for direct replacement service on select Tacoma, Tundra, 4Runner, and T100 models.

• Metal construction for fuel system durability
• System pressure: 44
• Inlet type: push in; inlet diameter: 0.43 in. / 11.0 mm
• Outlet type: hose; outlet diameter: 0.31 in. / 8.0 mm
• Mounting type: bolt-on design
• No gauge port and not adjustable
• OE heritage from Delphi, with aftermarket engineering informed by original equipment experience

OE-Style Replacement Design

Delphi FP10412 is a fuel injection pressure regulator for maintaining the specified fuel pressure in the injection system. Its fixed 44-pressure design, single inlet and outlet layout, and metal body support consistent fuel delivery on Toyota Tacoma, Toyota Tundra, Toyota 4Runner, and Toyota T100 applications. This part cross-references Beck/Arnley 158-0948 for the same application.

Vehicle Fitment

• Fits 1995-2004 Toyota Tacoma, N/A
• Fits 2000-2004 Toyota Tundra, N/A
• Fits 1996-2002 Toyota 4Runner, N/A
• Fits 1995-1998 Toyota T100, N/A

Common Symptoms It Can Address

• Fuel pressure that is too high or too low for the injection system
• Rough idle caused by unstable fuel delivery
• Hard starting related to inconsistent rail pressure
• Fuel mixture issues tied to pressure regulation problems
• Driveability concerns on Toyota Tacoma, Tundra, 4Runner, or T100 fuel systems

Installation Notes

Confirm the inlet and outlet sizes, mounting style, and system pressure before installation. This regulator uses a push-in inlet, hose outlet, and bolt mounting arrangement, so the existing fuel line and mounting points must match the OE configuration. Verify the application by year, make, and model before ordering the Delphi FP10412.

Quality Assurance

Delphi draws on more than a century of OE experience and supplier knowledge from work with major automakers. That background is reflected in the FP10412’s OE-oriented design and material selection for fuel system service.