Motorad 5298-180 Engine Coolant Thermostat

Motorad UltraStat 5298-180 Thermostat Overview

Motorad UltraStat 5298-180 is an engine coolant thermostat built for precise temperature control in a wide range of Toyota, Lexus, Scion, and Mitsubishi applications. This 180 degree thermostat supports stable coolant flow for OE-style cooling performance in vehicles such as the Toyota Tacoma, Toyota Yaris, and Lexus GS300.

The UltraStat line focuses on durable stainless steel construction and valve control that helps reduce abrupt temperature changes in the cooling system. If you are replacing a worn thermostat on a Toyota Tacoma 180F application or servicing a Toyota Prius, this part number 5298-180 is a direct-fit style option for confirmed applications.

Key Features

• 180 degree Fahrenheit engine coolant thermostat
• Heavy-gauge stainless steel construction for corrosion resistance
• BLVT valve technology helps moderate thermal shock to cooling components
• Jiggle pin weep hole included for air bleeding during service
• Sealing flange outside diameter: 2.2 in
• Bypass diameter: 1.09 in
• Bypass length: 1.34 in
• Flange thickness: 0.05 in
• Gasket or seal not included

Product Details

Motorad UltraStat 5298-180 is engineered as an engine coolant thermostat for OE-specified 180 degree systems. The stainless steel body is built for long-term durability and corrosion resistance, while the valve design is intended to smooth coolant regulation as engine temperature rises and falls. This makes it a practical choice for drivers searching for a Toyota Yaris thermostat 180 degree replacement, a Lexus IS300 cooling system service part, or a Mitsubishi Outlander thermostat replacement.

This part cross-references Dorman HELP 46108 and Wix 46308 for the same application.

Common Problems This Part Can Address

• Engine running too cool or too warm due to thermostat wear
• Delayed coolant circulation after cold starts
• Temperature fluctuation caused by a sticking thermostat
• Cooling system corrosion at the thermostat housing interface
• Air trapped in the cooling system during thermostat service

Installation Notes and Fitment Tips

• Fits 2017-2019 Toyota Hiace, N/A
• Fits 2006-2014 Toyota Hiace, N/A
• Fits 2004-2018 Toyota Yaris, N/A
• Fits 2016 Toyota Tacoma, N/A; Temperature 180F; To 08/2015; OE specified temperature
• Fits 2016 Toyota Yaris R, N/A
• Fits 2009-2015 Mitsubishi Lancer, N/A
• Fits 2012-2015 Mitsubishi Outlander, N/A
• Fits 2008-2010 Mitsubishi Outlander, N/A
• Fits 1995-2015 Toyota Tacoma, N/A
• Fits 2004-2014 Toyota Hilux, N/A
• Fits 2010 Toyota 4Runner, N/A
• Fits 1996-2000 Toyota 4Runner, N/A
• Fits 2001-2009 Toyota Prius, N/A
• Fits 2004-2006 Scion xA, N/A
• Fits 2004-2006 Scion xB, N/A
• Fits 1993-2005 Lexus GS300, N/A
• Fits 2001-2005 Lexus IS300, N/A
• Fits 2000-2005 Toyota Echo, N/A
• Fits 1992-2000 Lexus SC300, N/A
• Fits 1993-1998 Toyota Supra, N/A
• Fits 1994-1998 Toyota T100, N/A
• Fits 1991-1997 Toyota Previa, N/A

Verify the OE thermostat temperature and housing dimensions before installation. The jiggle pin weep hole should be oriented to allow trapped air to escape during refill and bleeding. Because the gasket or seal is not included, reuse only if serviceable or source the correct sealing component separately.

Quality Assurance

Motorad UltraStat thermostats use stainless steel construction and valve technology focused on consistent coolant control and corrosion resistance. Part number 5298-180 is built for confirmed OE-style applications across Toyota, Lexus, Scion, and Mitsubishi cooling systems.