Four Seasons 85905 Engine Coolant Filler Neck

Coolant Filler Neck for Lexus and Toyota

Four Seasons 85905 is an engine coolant filler neck made from plastic for cooling system service on select Lexus and Toyota applications. This coolant filler neck is specified in a w/o thermostat style and is used as part of the engine coolant components assembly.

Compatible With 2006 Lexus RX330, N/A; 2007-2009 Lexus RX350, N/A; and 2007-2009 Toyota Sienna, N/A. Four Seasons Coolant Filler Neck 85905 is a direct-fit cooling system component for these vehicle applications.

Key Features

• Brand: Four Seasons Coolant Filler Neck
• Part number: 85905
• Plastic construction for coolant system use
• Engine coolant filler neck, style w/o thermostat
• Cap not included
• Clamps not included
• Mounting hardware not included
• Used as an engine coolant components service part

Product Details

This coolant filler neck is built for cooling system repair where the original filler neck is cracked, worn, or no longer sealing correctly. It serves as the fill point in the engine coolant circuit and is listed for 2006 Lexus RX330, 2007-2009 Lexus RX350, and 2007-2009 Toyota Sienna applications. The Four Seasons 85905 part number is also referenced by Dorman - Conduct-Tite 85905 for the same application.

The Four Seasons Coolant Filler Neck line focuses on replacement cooling system components for service work on import vehicles. For shoppers searching for a Lexus RX350 coolant filler neck, Toyota Sienna coolant filler neck, or Four Seasons 85905 replacement, this part matches the listed fitment and configuration.

Common Problems This Part Can Address

• Cracked or damaged coolant filler neck housing
• Coolant leaks at the fill point
• Improper sealing at the cooling system neck
• Corrosion or wear in the original coolant neck assembly
• Service replacement for a missing or failed filler neck

Installation Notes and Tips

Verify the vehicle year, model, and cooling system configuration before installation. Compare the original filler neck to Four Seasons 85905 to confirm the w/o thermostat style, mounting points, and hose connection layout. Inspect related cooling system parts, including hoses, clamps, and the cap, since these items are not included.

After installation, refill and bleed the cooling system according to factory service procedures to help prevent air pockets and overheating concerns.

Quality Assurance

Four Seasons supplies replacement cooling system components for service applications, and this part is cataloged for the listed Lexus and Toyota fitments. Part number 85905 is cross-referenced with Dorman - Conduct-Tite 85905 for the same application.