Motorad DEF101 Diesel Exhaust Fluid (DEF) Filler Cap

Diesel Emissions Fluid Cap for Ford Applications

The Motorad Diesel Emissions Fluid Cap, part number DEF101, is a threaded DEF filler cap built to seal the diesel exhaust fluid filler neck and help prevent leaks or spills. It is a specific-fit replacement for select Ford diesel applications, including Ford Transit, F-150, F-250 Super Duty, and F-350 Super Duty models.

Motorad DEF101 is designed for the diesel emissions fluid system and uses a blue plastic-and-rubber construction with a female screw-on thread. The cap measures 1.20 in inside diameter and 1.82 in shell diameter for a direct replacement on the specified filler neck design.

Key Features

• Part number DEF101 diesel exhaust fluid filler cap
• Threaded, screw-on attachment with female thread design
• Blue plastic and rubber construction
• 1.20 in inside diameter and 1.20 in thread diameter
• 1.82 in shell diameter for specific-fit Ford DEF applications
• Replacement cap for diesel emissions fluid filler neck sealing

Product Details

This Motorad Diesel Emissions Fluid Cap is made to restore proper closure at the DEF filler neck, helping keep diesel exhaust fluid contained and reducing exposure to outside contaminants. It is a direct replacement style cap for Ford diesel vehicles that use the listed filler neck configuration. This part cross-references Dorman - HD Solutions 904-5301 for the same application.

Compatible with Ford Transit, Ford F-150, Ford F-250 Super Duty, Ford F-350 Super Duty, Ford Transit Custom, Ford Transit-150, Ford Transit-250, Ford Transit-350, Ford Transit-350 HD, and Ford E-350 Super Duty applications where the specified DEF cap is used. Search terms such as Ford Transit DEF cap replacement, Ford F-250 Super Duty diesel exhaust fluid cap, and Motorad DEF101 filler cap match this part.

What It Helps Address

• DEF leakage at the filler neck
• Spillage during refueling or service
• Contamination entering the diesel emissions fluid opening
• Damaged, missing, or worn DEF cap replacement needs
• Improper sealing of the diesel exhaust fluid system

Installation Notes

Install by matching the threaded female screw-on design to the vehicle’s DEF filler neck and tightening securely by hand. Confirm the cap style, thread diameter, and specific-fit application before installation. For fitment-based searches, this part is commonly referenced for 2010-2022 Ford diesel models, including 2015-2022 Ford Transit and 2018-2020 Ford F-150.

Quality Assurance

Motorad supplies this DEF cap as a replacement component for diesel emissions fluid system service. The design focuses on proper sealing and restoration of the filler neck closure for the listed Ford applications.