Delphi EX63803AD Fuel Injector

Delphi EX63803AD Fuel Injector Overview

The Delphi EX63803AD is a remanufactured diesel fuel injector built for light-duty diesel systems that demand accurate fuel delivery and consistent operation. Backed by Delphi’s OE heritage, it is a practical replacement for Ford diesel applications including the E-350 Super Duty, Excursion, F-250 Super Duty, and F-350 Super Duty.

Use this injector when you need a direct replacement for a worn or failing diesel injector in a Ford 7-cylinder application. The EX63803AD combines OE-informed engineering with a standard replacement design for service work on high-mileage diesel engines.

Key Features

• Brand: Delphi
• Part number: EX63803AD
• Fuel type: Diesel
• System type: Light-duty diesel injector
• Item grade: Standard replacement
• Remanufactured injector for service replacement
• Connector shape: Oval
• Connector gender: Female
• Terminal type: Pin with 2 terminals
• Attachment method: Bolt
• Body material: Metal and plastic
• Gasket or seal included: Yes
• O-ring quantity: 3

Detailed Description

Delphi EX63803AD is a remanufactured fuel injector for diesel-powered Ford trucks and vans that use this OE-style application. Delphi draws on more than a century of OE experience, and that background is reflected in the fit, form, and service-focused construction of this injector. It is intended for drivers and technicians replacing a failed injector in Ford E-350 Club Wagon, E-350 Super Duty, Excursion, F-250 Super Duty, F-350 Super Duty, and E-350 Econoline Club Wagon applications.

This part cross-references Standard Ignition FJ738 for the same application. The EX63803AD is identified by its oval female connector, pin terminals, bolt-on attachment, and included seals for installation in the correct diesel fuel system.

What It Helps Fix

• Hard starting on diesel engines
• Rough idle or uneven cylinder fueling
• Loss of power under load
• Excess smoke from poor injector performance
• Fuel delivery issues caused by a worn injector

Installation Notes and Tips

Verify OE part number match and cylinder application before installation. This injector uses a bolt attachment method, oval female connector, and pin-style terminals, so connector and seal inspection should be completed before reassembly. Replace any damaged seals during service and follow the vehicle manufacturer’s diesel fuel system procedures for priming, coding, or relearn steps if required.

Fits 2003 Ford E-350 Club Wagon, N/A. Fits 1999-2003 Ford E-350 Super Duty, N/A. Fits 2000-2003 Ford Excursion, N/A. Fits 2000-2003 Ford F-250 Super Duty, N/A. Fits 1999-2003 Ford F-350 Super Duty, N/A. Fits 1999-2002 Ford E-350 Econoline Club Wagon, N/A. Fits 1999 Ford F-250 Super Duty, N/A.

Quality Assurance

Delphi builds this injector using OE-based knowledge developed through long-term supplier experience with major automakers. The EX63803AD is a remanufactured standard replacement part intended to meet the needs of diesel service work while maintaining the specifications required for the listed Ford applications.