Delphi FP10455 Fuel Injection Pressure Regulator

Fuel Pressure Control for Mazda Miata

Delphi FP10455 is a fuel injection pressure regulator built for precise fuel system control in 1999-2005 Mazda Miata applications. It uses a metal body, a bolt-on mounting design, and a push-in inlet with hose outlet connections for a direct replacement approach.

Backed by Delphi’s OE heritage and decades of supplier experience, this fuel injection pressure regulator is built with the same application knowledge used in original equipment development. For Mazda Miata fuel pressure regulator replacement needs, FP10455 supports consistent system pressure and clean fuel delivery.

Key Features

• Fits 1999-2005 Mazda Miata
• Fuel injection pressure regulator for air and fuel delivery systems
• Metal construction for durable service
• System pressure: 58
• Push-in inlet and hose outlet connection style
• Bolt-on mounting type for secure installation
• No gauge port and non-adjustable design
• Delphi FP10455 replacement part number for catalog matching

Detailed Product Overview

Delphi FP10455 is engineered for fuel pressure regulation in the Mazda Miata fuel injection system. The regulator features a 0.43 in. (11.0 mm) inlet port diameter and a 0.31 in. (8.0 mm) outlet port diameter, with one inlet and one outlet for straightforward routing. Its 58 system pressure specification makes it a direct-fit option for vehicles requiring this pressure range.

This part cross-references Beck/Arnley 158-1177 and Standard Ignition PR251 for the same application. If you are searching for a 1999-2005 Mazda Miata fuel injection pressure regulator or Delphi FP10455, this part matches the listed fitment and connection style.

Common Issues This Part Can Address

• Fuel pressure that is outside the specified system range
• Hard starting caused by unstable fuel delivery
• Rich or lean running conditions related to regulator wear
• Fuel odor or seepage at the regulator connection points
• Driveability concerns tied to inconsistent injector pressure

Installation Notes and Tips

Verify the inlet and outlet connection style, port diameters, and mounting location before installation. Confirm that the replacement regulator matches the vehicle’s required 58 system pressure and the 1999-2005 Mazda Miata application. Inspect fuel lines, seals, and surrounding components for wear before reassembly.

Quality Assurance

Delphi builds aftermarket parts using OE experience and supplier knowledge developed over more than 100 years of original equipment involvement. FP10455 reflects that OE-based engineering approach for fuel system service on the Mazda Miata.