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Delphi FP10523 Fuel Injection Pressure Regulator
| Brand | Delphi FP10523 |
|---|---|
| Adjustable | No |
| Gauge Port | No |
| Inlet Port Diameter | 0.47 |
| Inlet Port Diameter | 12.0 |
| Inlet Quantity | 1 |
| Inlet Type | Threaded |
| Material | Metal |
| Material | Metal |
| Mounting Type | Clamp |
| Outlet Port Diameter | 0.31 |
| Outlet Port Diameter | 8.0 |
| Outlet Quantity | 1 |
| Outlet Type | Hose |
| System Pressure | 44 |
| Fits | Lexus · 5 vehicles |
OE heritage. Built with a century of original-equipment experience.
Metal construction. Provides durable, dependable fuel system performance.
Threaded inlet. Hose outlet and clamp mounting simplify installation.
Cross-references Gates 23033, Standard Ignition PR272 and 5G1234 for the same application. See all 7.
Fuel Pressure Control for Lexus Applications
The Delphi FP10523 fuel injection pressure regulator is built for precise fuel system control in select Lexus models. It uses a metal body, threaded inlet, hose outlet, and clamp mounting style to match the original-style layout on the fuel rail system.
Fits 1995-1997 Lexus LS400 and 1996-1997 Lexus SC400. Delphi’s OE heritage and supplier experience are reflected in the design and material selection for this fuel injection pressure regulator.
Key Features
- Fuel injection pressure regulator for air and fuel delivery systems
- Metal construction for durability in fuel system service
- Threaded inlet with hose-style outlet
- 1 inlet port and 1 outlet port
- Clamp-mounted design
- Fixed system pressure: 44
- No gauge port and no adjustability
- Direct-fit application for select Lexus LS400 and Lexus SC400 models
Detailed Description
Delphi FP10523 is a fuel injection pressure regulator engineered for vehicles that require stable fuel pressure at the injection system. The unit features a 12.0 mm threaded inlet, 8.0 mm hose outlet, and metal construction to support consistent fuel delivery in the fuel rail assembly. This part number is used in 1995-1997 Lexus LS400 and 1996-1997 Lexus SC400 applications, making it a focused replacement for those fuel system configurations. Delphi FP10523 also cross-references Gates 23033 for the same application.
Common Issues This Part Can Address
- Fuel pressure that is too high or too low at the rail
- Hard starting caused by unstable fuel delivery
- Rough idle related to inconsistent injector pressure
- Fuel odor or rich-running symptoms tied to regulator failure
- Driveability problems on Lexus LS400 and Lexus SC400 fuel systems
Installation Notes and Tips
Verify inlet and outlet port sizes, threaded connection style, and clamp mounting before installation. Confirm the vehicle is a 1995-1997 Lexus LS400 or 1996-1997 Lexus SC400, and compare the original regulator layout to Delphi FP10523 before replacement. Clean the surrounding fuel system area and inspect hoses and threaded connections for wear or damage during service.
Quality Assurance
Delphi builds aftermarket parts using OE experience developed through long-term supplier relationships with major automakers. The FP10523 reflects that OE-focused engineering approach for fuel system replacement service.
| Year | Make | Model | Submodel | Position | Notes |
|---|---|---|---|---|---|
| 1997 | Lexus | LS400 | Base | N/A | — |
| 1997 | Lexus | SC400 | — | N/A | — |
| 1996 | Lexus | LS400 | Base | N/A | — |
| 1996 | Lexus | SC400 | — | N/A | — |
| 1995 | Lexus | LS400 | Base | N/A | — |
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