Delphi FT4084 Fuel Transfer Unit - Left

Delphi FT4084 Fuel Transfer Unit Overview

The Delphi FT4084 is an in-tank diesel fuel transfer unit with an integrated fuel level sender assembly for select Mercedes-Benz applications. Built from Delphi’s OE heritage and aftermarket engineering experience, it is a standard replacement for restoring fuel delivery and tank level reporting on the left side of the vehicle.

• In-tank fuel transfer unit for diesel applications
• Integrated fuel level sender assembly included
• Quick connect outlet with 0.375 in. outside diameter
• 3-terminal male blade electrical connection
• Standard replacement part for select Mercedes-Benz diesel models
• Position: left

Vehicle Fitment

• Fits 2016-2017 Mercedes-Benz GLE300d, left.
• Fits 2017 Mercedes-Benz GLS350d, left.
• Fits 2013-2016 Mercedes-Benz GL350, left.
• Fits 2015 Mercedes-Benz ML250, left.

Detailed Product Description

Delphi FT4084 is a diesel fuel transfer unit engineered for in-tank installation and direct replacement service on the left side. It includes the fuel level sender assembly and uses a quick connect outlet, blade terminals, and a 3-terminal male electrical interface for a clean OE-style service replacement. For shoppers searching for a Mercedes-Benz GLE300d fuel transfer unit, Mercedes-Benz GL350 left fuel pump assembly, or Delphi FT4084 replacement, this part matches the listed applications and supports accurate fuel level reporting.

This part cross-references Delphi CFT4084 for the same application.

What This Part Helps Address

• Hard starting caused by weak or inconsistent diesel fuel delivery
• Fuel gauge readings that no longer track tank level correctly
• Intermittent fuel pickup issues from a worn in-tank transfer unit
• Replacement needs after tank service on select Mercedes-Benz diesel models
• Left-side fuel system repair on listed GLE300d, GLS350d, GL350, and ML250 vehicles

Installation Notes and Tips

Install this unit in the tank on the left side only for the listed applications. Delphi notes that the fuel tank should be cleaned before installing the fuel pump to help prevent future seal problems. The package includes the fuel transfer unit with float arm and an instruction sheet; gasket or seal, strainer, and regulator are not included.

Quality Assurance

Delphi draws on more than a century of OE experience and supplier knowledge used by major automakers. The FT4084 is built as a standard replacement fuel transfer unit for the specified Mercedes-Benz diesel fitments, including 2016-2017 Mercedes-Benz GLE300d, 2017 Mercedes-Benz GLS350d, 2013-2016 Mercedes-Benz GL350, and 2015 Mercedes-Benz ML250.