Dorman 902-5174 Engine Coolant Thermostat Housing Assembly - Outer
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Dorman

Dorman 902-5174 Engine Coolant Thermostat Housing Assembly - Outer

Brand Dorman 902-5174
Position Outer
Material Plastic
Color Black
Inside Diameter 0.55
Mounting Hardware Included No
Grade Type Regular
Gasket Or Seal Included Yes
Mounting Hole Quantity 2
Bolt Hole Center To Bolt Hole Center 3.2
Gasket Type Gasket
Flange Length 3.9
Flange Thickness 0.39
Flange Width 3.55
Outlet Port Quantity 1
Bleeder Hole No
Package Contents 1 thermostat housing; 1 thermostat; 1 gasket
Thermostat Included Yes
Thermostat Opening Temperature 180 deg. f
Fits Lexus and Toyota · 20 vehicles

OE-style replacement. Engineered to match stock fit and durability.

Plastic housing. Lightweight construction with a black finish.

Gasket included. Comes with a thermostat and gasket for a complete assembly.

Cross-references Motorad 756-180 and 1603136010 for the same application. See all 2.

$45.77Free shipping
In stock · usually ships same day before 1pm CST
Step 1 — Confirm fitment
Free return shipping if it doesn't fit when you check fitment here first.

Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
Step 2 — Quantity
Order total $45.77
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.
Not what you need? See all Engine Coolant Thermostat Housing Assembly options

Engine Coolant Thermostat Housing for Toyota and Lexus

Dorman 902-5174 is an engine coolant thermostat housing assembly built to match the fit and durability of the original housing on select Toyota and Lexus applications. It includes the thermostat and gasket, and it is made to handle repeated temperature swings in the cooling system.

  • Plastic housing with a black finish
  • Integrated thermostat included, set to open at 180 Deg. F
  • Gasket included for sealing at the housing interface
  • 1 outlet port, 2 mounting holes, and no bleeder hole
  • Designed for specified Toyota Avalon, Toyota Camry, and Lexus ES300h applications

Detailed Product Information

This Dorman thermostat housing assembly, part number 902-5174, is a direct replacement-style cooling system component for vehicles that use an integrated cover design. The housing is built from plastic and sized with a 3.9-inch flange length, 3.55-inch flange width, and 0.39-inch flange thickness, with a 0.55-inch inside diameter and 3.2-inch bolt hole center spacing. It is engineered for consistent sealing and thermal performance in the engine coolant circuit.

Compatible With 2020-2021 Toyota Avalon, Outer; 2013-2018 Toyota Avalon, Outer; 2013-2018 Lexus ES300h; and 2012-2017 Toyota Camry. This part cross-references Motorad 756-180 for the same application.

Common Replacement Reasons

  • Coolant leaks at the thermostat housing
  • Cracked or warped plastic housing surfaces
  • Thermostat sticking or incorrect coolant temperature control
  • Sealing issues at the gasket interface
  • Overheating concerns tied to a damaged housing assembly

Installation Notes

Verify the vehicle application, position, and housing style before installation. Replace the gasket during service, clean the mating surfaces thoroughly, and confirm the cooling system is properly filled and bled after installation. This assembly does not include mounting hardware.

Quality Assurance

Dorman designs replacement cooling components to match original fit and durability requirements for specified vehicles. Part number 902-5174 is built for the listed Toyota Avalon, Toyota Camry, and Lexus ES300h applications and is intended to withstand extreme temperature changes for extended service life.

Related reading

This part fits 20 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersFuel TypePositionNotes
2021ToyotaAvalon2.5LL4—OuterEngine coolant thermostat housing assembly with integrated cover.
2020ToyotaAvalon2.5LL4—OuterEngine coolant thermostat housing assembly with integrated cover.
2018LexusES300h2.5LL4—N/AEngine coolant thermostat housing assembly with integrated cover.
2018ToyotaAvalon2.5LL4—OuterEngine coolant thermostat housing assembly with integrated cover.
2017LexusES300h2.5LL4—N/AEngine coolant thermostat housing assembly with integrated cover.
2017ToyotaAvalon2.5LL4—OuterEngine coolant thermostat housing assembly with integrated cover.
2017ToyotaCamry2.5LL4ELECTRIC/GASN/AEngine coolant thermostat housing assembly with integrated cover.
2016LexusES300h2.5LL4—N/AEngine coolant thermostat housing assembly with integrated cover.
2016ToyotaAvalon2.5LL4—OuterEngine coolant thermostat housing assembly with integrated cover.
2016ToyotaCamry2.5LL4ELECTRIC/GASN/AEngine coolant thermostat housing assembly with integrated cover.
2015LexusES300h2.5LL4—N/AEngine coolant thermostat housing assembly with integrated cover.
2015ToyotaAvalon2.5LL4—OuterEngine coolant thermostat housing assembly with integrated cover.
2015ToyotaCamry2.5LL4ELECTRIC/GASN/AEngine coolant thermostat housing assembly with integrated cover.
2014LexusES300h2.5LL4—N/AEngine coolant thermostat housing assembly with integrated cover.
2014ToyotaAvalon2.5LL4—OuterEngine coolant thermostat housing assembly with integrated cover.
2014ToyotaCamry2.5LL4ELECTRIC/GASN/AEngine coolant thermostat housing assembly with integrated cover.
2013LexusES300h2.5LL4—N/AEngine coolant thermostat housing assembly with integrated cover.
2013ToyotaAvalon2.5LL4—OuterEngine coolant thermostat housing assembly with integrated cover.
2013ToyotaCamry2.5LL4ELECTRIC/GASN/AEngine coolant thermostat housing assembly with integrated cover.
2012ToyotaCamry2.5LL4ELECTRIC/GASN/AEngine coolant thermostat housing assembly with integrated cover.
Directly replaces or cross-references 2 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Motorad — 756-1801603136010