Motorad 1049-188 Engine Coolant Thermostat Housing Assembly

Integrated Housing Thermostat for Toyota and Lexus

Motorad 1049-188 is an integrated housing thermostat assembly built for OE-style cooling system service. It uses OEM-quality materials and manufacturing processes, with a copper case and wax compound for quick response to coolant temperature changes. This 188 degree thermostat housing assembly is a direct-fit solution for select Toyota Camry, Avalon, Highlander, Sienna, and Lexus ES350, RX350, and RX350L applications.

Key Features

• Integrated housing thermostat assembly with thermostat, housing, sensor, and seal
• Opening temperature: 188 Deg. F
• Plastic housing with black finish
• Rubber gasket/seal included
• Jiggle pin included for coolant bleeding support
• 3 bolt holes and 2 outlet ports
• Outlet diameters: 1.35 in and 0.87 in
• OE supplier manufacturing with OEM specifications and processes

Product Details

The Motorad Integrated Housing Thermostat line is built for vehicles that use a combined thermostat and housing design, helping simplify replacement on modern cooling systems. Part number 1049-188 is specified at 188 degrees Fahrenheit and is engineered to respond quickly as coolant temperature changes. Its plastic housing, rubber seal, and copper/wax thermostat construction support consistent temperature control in demanding daily driving conditions. This part cross-references Dorman OE Solutions 902-5216 for the same application.

Compatible With 2023-2025 Lexus ES350, 2023-2024 Toyota Camry, 2022 Lexus RX350, 2022 Lexus RX350L, 2019-2022 Toyota Avalon, 2018-2022 Toyota Camry, 2022 Toyota Highlander, 2019-2021 Lexus ES350, 2016-2021 Lexus RX350, 2018-2021 Lexus RX350L, 2017-2021 Toyota Highlander, and 2017-2020 Toyota Sienna. Motorad 1049-188 is a practical OE-style choice when servicing a Toyota Camry thermostat housing assembly or a Lexus ES350 coolant thermostat housing replacement.

Common Problems This Part Can Address

• Engine running too cool or too warm due to thermostat wear
• Coolant leaks at the thermostat housing or seal area
• Temperature control issues caused by a damaged integrated housing
• Slow thermostat response from aging wax element components
• Service concerns on vehicles using a factory-style integrated housing design

Installation Notes

Verify the 188 degree temperature rating and match the outlet diameters, bolt-hole count, and housing style before installation. Replace the seal during service and inspect the mating surfaces for corrosion, warping, or debris. The housing uses 3 bolt holes and does not include bolts or mounting hardware, so reuse or source the correct fasteners separately as needed. Confirm the vehicle application by year, make, and model before installation on Toyota Camry, Avalon, Highlander, Sienna, or Lexus ES350 and RX350 platforms.

Quality Assurance

Motorad manufactures this integrated housing thermostat with OEM-quality materials and safety standards as an OE supplier. The part is produced to OEM specifications and processes for consistent fit and temperature control in compatible Toyota and Lexus cooling systems. Part number 1049-188 is also listed under common interchange references including Wix 51049.