Replacement REPF314598 Electric Fuel Pump Module Assembly with Sending Unit - Left Side

The Replacement REPF314598 is a complete electric fuel pump module assembly designed as a direct OEM replacement, superseding Ford part number 4R3Z9H307AA. This is the left side (LH) pump for the saddle-style dual-tank fuel system used on the 2005 Ford Mustang. It includes the fuel pump, sending unit, and all necessary hardware for a complete, drop-in installation.

The 2005 Mustang uses a split saddle-style fuel tank requiring two separate pump assemblies — this unit services the left side of the tank and is responsible for transferring fuel to the right (primary) side, ensuring consistent fuel delivery under all driving conditions.

Key Features:

• Complete fuel pump module assembly with integrated fuel level sending unit
• Direct replacement for OEM part number 4R3Z9H307AA
• Left side (LH) tank application for 2005 Ford Mustang saddle tank system
• Factory-style electrical connector for plug-and-play installation using the stock wiring harness
• Designed to meet or exceed original equipment fit, form, and function
• Restores proper fuel pressure, fuel flow, and accurate fuel gauge readings

Cross-Reference Part Numbers: 4R3Z9H307AA, 5R3Z9H307AC, E2457M (Airtex), P76342M (Carter), FG0880 (Delphi), SP2062M / SP2397M (Spectra Premium), PFS401 (Motorcraft)