Delphi FP10546 Fuel Injection Pressure Regulator

Fuel Pressure Control for Lexus and Toyota

The Delphi FP10546 fuel injection pressure regulator is built for fuel system service on select Lexus and Toyota applications. It uses a metal body, a push-in inlet, and a hose outlet to maintain the specified 51 system pressure in the fuel delivery circuit.

Fits 1999-2000 Lexus GS400, N/A; Fits 2000-2005 Lexus GS300, N/A; Fits 2001-2005 Lexus GS430, N/A; Fits 2001-2006 Lexus LS430, N/A; Fits 2001-2003 Lexus RX300, N/A; Fits 2001-2003 Toyota Highlander, N/A; Fits 2002-2010 Lexus SC430, N/A.

Key Features

• Delphi FP10546 fuel injection pressure regulator
• Metal construction for fuel system durability
• Push-in inlet with hose outlet connection
• Clamp-mounted design
• Single inlet and single outlet configuration
• Set system pressure: 51
• No gauge port and non-adjustable design

Detailed Product Overview

Delphi draws on OE experience and supplier knowledge developed over decades of original-equipment service. That background is reflected in the FP10546, a fuel injection pressure regulator engineered for precise fuel pressure control in the tank-mounted fuel delivery systems used on select Lexus GS300, GS430, LS430, RX300, SC430, GS400, and Toyota Highlander applications. The part number FP10546 is also referenced in cross applications such as Gates 24060 and 24062.

This regulator features a 13.0 mm inlet port diameter, an 8.0 mm outlet port diameter, metal construction, and a clamp-style mounting arrangement. It is a non-adjustable unit with no gauge port, making it a direct replacement style component for vehicles that require the specified pressure regulation setup.

Common Fuel System Issues It Addresses

• Fuel pressure that is outside the specified range
• Hard starting caused by unstable fuel delivery
• Rough idle related to inconsistent injector pressure
• Lean or rich running conditions tied to pressure regulation faults
• Fuel delivery complaints in tank-mounted regulator applications

Installation Notes and Tips

Verify the inlet and outlet connection style, port diameters, and system pressure before installation. This regulator is used in fuel tank applications on the listed Lexus and Toyota models, so confirm the vehicle’s original fuel system layout and match the OE-style mounting and hose connections. Clean surrounding fuel system components during service and inspect related lines and seals for wear before reassembly.

Quality Assurance

Delphi builds aftermarket parts using OE heritage and technical knowledge developed through long-term original-equipment supply. The FP10546 is produced to support consistent fuel pressure control for the specified Lexus and Toyota fitments.