Autotecnica TY0717903 Engine Coolant Reservoir

Engine Coolant Reservoir for Toyota Sequoia and Tundra

Replace a cracked or leaking coolant overflow tank with this Autotecnica engine coolant reservoir, part number TY0717903. It is built from HDPE plastic and includes a snap-fit cap for a direct replacement on select Toyota Sequoia and Toyota Tundra applications.

Key Features

• Engine coolant reservoir for cooling system fluid expansion and recovery
• HDPE plastic construction for everyday underhood durability
• Snap-fit cap included
• Three mounting holes for secure installation
• Non-pressurized design
• No level sensor provision
• Dimensions: 201 mm length, 344 mm height, 117 mm width

Detailed Description

Autotecnica TY0717903 is an aftermarket engine coolant reservoir made for select Toyota cooling system applications. It is shaped to match the original reservoir layout and uses a snap-fit cap style, making it a practical replacement when the factory tank is damaged, discolored, or no longer sealing properly. This reservoir is listed for 2001-2007 Toyota Sequoia and 2004-2006 Toyota Tundra, with notes that it includes the cap and hose. This part cross-references Dorman OE Solutions 603-328 for the same application.

Autotecnica manufactures replacement parts to ISO/TS 16949 QMS specifications and positions this component as an OE-style alternative for Toyota Sequoia and Toyota Tundra owners who need a direct-fit cooling system reservoir. Part number TY0717903 is also referenced by OE-style interchange numbers 16470-0F010 and FRT2018C.

Common Problems This Part Can Help Solve

• Coolant loss from a cracked or aging reservoir
• Overflow tank leaks caused by heat cycling and plastic fatigue
• Broken or missing reservoir cap
• Improper coolant recovery after engine warm-up and cooldown
• Visible staining, warping, or discoloration on the original tank

Installation Notes and Tips

Verify the reservoir shape, mounting points, and hose routing against the original part before installation. Transfer any reusable hoses or related components as needed, and inspect the surrounding cooling system for cracks, hardened hoses, or coolant residue before refilling. This reservoir is non-pressurized and does not include a level sensor.

Quality Assurance

Autotecnica manufactures aftermarket parts under ISO/TS 16949 QMS specifications and backs this part with a two-year, unlimited mileage warranty.