Delphi FP10317 Fuel Injection Pressure Regulator

Fuel Pressure Control for BMW Applications

Delphi FP10317 is a fuel injection pressure regulator built for returnless fuel systems that need stable fuel delivery and consistent pressure control. It uses a metal body, a push-in inlet, and a clamp-style mounting design for a direct-fit service replacement on select BMW models.

With OE heritage built into every aftermarket part, Delphi draws on more than 100 years of original equipment experience to support accurate fit and dependable operation. This regulator is used across a wide range of BMW 3 Series, 5 Series, 7 Series, X5, Z3, M3, and related applications.

Key Features

• Delphi FP10317 fuel injection pressure regulator
• Metal construction for fuel system durability
• Returnless outlet type for supported BMW fuel systems
• Push-in inlet with one inlet port and one outlet port
• Clamp mounting type for secure installation
• No gauge port and non-adjustable design
• Inlet port diameter: 0.94 in. / 24.0 mm

Detailed Description

The Delphi FP10317 is a fuel injection pressure regulator engineered for select BMW fuel delivery systems that require precise pressure management without an adjustable setting. Its metal construction and returnless outlet configuration make it a practical replacement for vehicles that rely on consistent fuel pressure to maintain drivability and fuel metering accuracy. This part number, FP10317, is commonly referenced for BMW 525i, 530i, 540i, 740i, 740iL, 750iL, X5, 323i, 328i, 528i, Z3, M3, 840Ci, 850Ci, 325i, and 325is applications.

This part cross-references Dorman OE Solutions 800-405 and Gates 22890 for the same application. Delphi FP10317 also aligns with OE-style replacement needs where the original regulator uses a push-in inlet and clamp-mounted, returnless layout.

What It Helps Address

• Fuel pressure that is too high or too low
• Hard starting caused by unstable fuel delivery
• Rough idle related to inconsistent injector pressure
• Fuel trim issues tied to pressure regulation faults
• Driveability problems on returnless BMW fuel systems

Installation Notes and Tips

Verify the inlet diameter, inlet type, outlet type, and mounting style against the original regulator before installation. Confirm vehicle-specific fitment by year and model, especially on BMW 525i, 530i, 540i, 740i, X5, and 328i applications where fuel system configurations can vary by production date. Use clean fuel system practices during service to help prevent contamination from entering the regulator or fuel rail.

Quality Assurance

Delphi applies OE experience and original equipment knowledge to its aftermarket fuel system components. FP10317 is built to reflect that OE-focused engineering approach for supported BMW applications.