Dorman 902-305XD Engine Coolant Filler Neck

Aluminum coolant filler neck for Dodge applications

Dorman 902-305XD is an OE FIX engine coolant filler neck for select Dodge Dakota and Dodge Durango models. It replaces the original plastic neck with aluminum construction to better handle underhood heat and reduce the risk of coolant leaks at the filler neck.

Compatible with 2000-2004 Dodge Dakota and 2000-2003 Dodge Durango, this part number 902-305XD is built for direct replacement service on vehicles with the original coolant filler neck design.

Key features

• Aluminum construction for improved durability versus the original plastic design
• Helps resist cracking at plastic weld areas that can lead to coolant loss
• Designed for 100 psi maximum pressure rating
• Two-port design with 43 mm outside diameter
• Natural finish with clockwise installation direction
• Includes clamps and mounting hardware as listed in the product contents
• Cross-reference: Motorad CH5324

Detailed product overview

This Dorman coolant filler neck addresses a known failure point on certain Dodge cooling systems by replacing the factory plastic component with a rugged aluminum unit. The upgraded material helps the neck withstand temperature swings in the engine bay, which can reduce the chance of seepage or cracking over time. Part number 902-305XD is a practical replacement for owners looking to restore cooling system integrity on a Dodge Dakota or Dodge Durango.

Fits 2000-2004 Dodge Dakota, N/A. Fits 2000-2003 Dodge Durango, N/A.

Common issues this part can help solve

• Coolant leaks from cracked filler neck plastic
• Damage at plastic weld seams on the original neck
• Cooling system pressure loss at the filler neck
• Repeated maintenance caused by a brittle factory neck

Installation notes and tips

Confirm the original neck style, hose routing, and mounting points before installation. The part uses clamps for attachment and rotates clockwise during installation. Verify seal condition and surrounding hoses during service, since worn hoses or damaged seals can contribute to leaks even after the filler neck is replaced.

Quality assurance

Dorman OE FIX parts are engineered to address common failure points with upgraded materials and revised construction. This aluminum filler neck is intended to provide improved coolant system protection compared with the original plastic design.