Dorman 902-5929 Engine Coolant Thermostat Housing - Outer

Engine Coolant Thermostat Housing for Toyota and Lexus

Dorman 902-5929 is a replacement engine coolant thermostat housing built to match the fit and durability of the original housing on specified Toyota and Lexus vehicles. Its metal construction is made to handle repeated temperature swings in the cooling system, helping maintain a secure thermostat housing seal area over time.

Compatible with select Toyota Avalon, Camry, Highlander, Sienna, Venza, RAV4, and Lexus RX350 and ES350 applications, this housing is a direct-fit cooling system service part for vehicles with the listed engine and position requirements. The Dorman 902-5929 is a practical choice when replacing a worn, cracked, or corroded thermostat housing.

Key Features

• Metal thermostat housing with a natural finish
• Outlet port diameter: 1.5 in.
• 45-degree housing neck angle
• Two mounting holes with 0.25 in. diameter
• No gasket or seal included
• No thermostat included
• No bleeder valve and no bolts included

Detailed Description

This engine coolant thermostat housing is engineered as a replacement for the stock housing used on select Toyota and Lexus cooling systems. The metal body is designed for durability in high-heat, high-coolant-temperature environments, making it suitable for service on vehicles such as the Toyota Camry, Avalon, Highlander, Sienna, Venza, RAV4, and Lexus RX350 and ES350. Part number 902-5929 is also referenced by Four Seasons 85355 and Gates CO34843 for the same application.

Use this housing when the original unit shows signs of leakage, warping, corrosion, or damaged mounting points. The 45-degree neck angle and 1.5-inch outlet port help match the OE-style cooling system layout on the listed applications.

What It Is Used For

• Replacing a cracked or corroded thermostat housing
• Repairing coolant leaks at the housing connection
• Restoring proper thermostat housing fit on Toyota Camry and Avalon cooling systems
• Servicing cooling system housings on Lexus RX350 and ES350 applications
• Addressing damaged mounting holes or distorted housing surfaces

Installation Notes and Tips

Verify engine code and vehicle application before installation, since fitment varies by year and engine configuration. This housing does not include a gasket, seal, thermostat, or bolts, so those service parts must be sourced separately as required by the repair. Clean the mating surfaces thoroughly and inspect the cooling system for related wear before reassembly.

• Fits 2016-2018 Lexus ES350, N/A; Cover; Engine No. Starts w/Digit
• Fits 2008-2018 Toyota Avalon, Outer; Engine coolant thermostat housing for cooling system.
• Fits 2012-2017 Toyota Camry, Outer; Engine coolant thermostat housing for cooling system.
• Fits 2014-2016 Toyota Highlander, N/A; Cover; Engine No. Starts w/D-G or M
• Fits 2010-2016 Toyota Sienna, N/A; Engine coolant thermostat housing for cooling system.
• Fits 2013-2016 Toyota Venza, N/A; Engine coolant thermostat housing for cooling system.
• Fits 2010-2015 Lexus RX350, Outer; Cover; Built in U.S.A.
• Fits 2011-2013 Toyota Highlander, N/A; Cover; Engine No. Starts w/A-L
• Fits 2011-2013 Toyota Highlander, N/A; Cover; Engine No. Starts w/6-8
• Fits 2010-2012 Toyota RAV4, N/A; Cover; Built in U.S.A.; Engine No. Starts w/D-G
• Fits 2009-2012 Toyota Venza, N/A; Cover; Engine No. Starts w/6-8 or A-L
• Fits 2007-2011 Toyota Camry, Outer; Cover; Built in U.S.A.
• Fits 2010 Toyota Highlander, N/A; Cover; Built in U.S.A.; Engine No. Starts w/A-L
• Fits 2010 Toyota Highlander, N/A; Cover; Built in U.S.A.; Engine No. Starts w/6-8
• Fits 2007-2009 Lexus RX350, Outer; Cover; Built in U.S.A.; Engine No. Starts w/Letter
• Fits 2007-2009 Toyota Sienna, Outer; Cover; Engine No. Starts w/6-8 or A-L
• Fits 2006-2007 Toyota Avalon, Outer; Cover; Engine No. Starts w/Letter

Quality Assurance

Dorman designs replacement parts to match the fit and durability of original equipment components, and this housing is built to withstand extreme temperature changes for extended service life in the cooling system.