MotoRad Engine Coolant Thermostat 461-180 — Direct-Fit Stainless Steel OEM-Style Replacement

MotoRad 461-180 is a direct-fit engine coolant thermostat designed to replace specific OEM units on many GM and compatible vehicles, restoring reliable temperature regulation in the cooling system.

This MotoRad thermostat (Part No. 461-180) is engineered as an original-equipment-style replacement for worn or failing thermostats. Constructed from high-grade stainless steel and copper, it meets or exceeds OEM standards and is intended for straightforward, vehicle-specific installation. It replaces several OEM part numbers including 90537453, 55350941, 21018811, 12622410, and 12615097, and fits a wide range of Chevrolet, GMC, Buick, Saturn, Pontiac, Saab, and Oldsmobile models.

Which vehicles is the 461-180 compatible with?

The MotoRad 461-180 fits a range of GM platforms and several models across the Chevrolet, GMC, Buick, Saturn, Pontiac, Saab, and Oldsmobile lineups. Compatibility covers many model years because this thermostat follows the original equipment design for those engines and cooling layouts.

• Chevrolet: Equinox (2010–2017), Malibu (2004–2014), Cobalt (2005–2010), HHR (2006–2011), Cavalier (2002–2005), Captiva Sport (2008–2015), Classic (2004–2005), Impala (2014), Orlando (2012–2014), Astra (2001–2002), Zafira (2002–2006)
• GMC: Terrain (2010–2017)
• Buick: Verano (2012–2017), Regal (2011–2017), LaCrosse (2010–2016), Allure (2010)
• Saturn, Pontiac, Saab and Oldsmobile: multiple compatible models and years listed in vehicle fit guides

How does this thermostat help my engine’s cooling system perform?

The thermostat regulates coolant flow to maintain the engine’s designed operating temperature, opening and closing at the correct setpoint to balance warm-up speed and cooling efficiency. Using a thermostat that mirrors original specifications helps avoid long warm-up times, overheating, or poor heater performance.

• Precise temperature response for stable engine operation
• Original equipment design for proper fit and sealing
• Materials resist corrosion for longer service life

What materials and manufacturing standards are used?

MotoRad builds the 461-180 from high-grade stainless steel and copper components, chosen for thermal responsiveness and corrosion resistance. The unit is manufactured to meet or exceed OEM tolerances so it performs like the factory-installed thermostat.

• Stainless steel body for durability and corrosion resistance
• Copper elements for reliable thermal transfer and actuation
• OEM-equivalent assembly for consistent fit and function

Is installation straightforward and what should I expect?

Installation is intended to be a direct replacement where the thermostat matches the vehicle-specific housing and mounting points. Basic mechanical skills and common hand tools are sufficient for most DIYers; always follow your vehicle’s service manual for torque and coolant-handling procedures.

• Vehicle-specific fit—no modification required for listed applications
• Replace gasket or O-ring and refill coolant as recommended
• Check for proper sealing and bleed trapped air after installation

Who is this for: The MotoRad 461-180 is aimed at vehicle owners, independent mechanics, and fleet technicians who need a reliable, OEM-style replacement thermostat for compatible GM-era engines. It’s suitable for anyone restoring correct cooling performance after a failed thermostat or during routine cooling-system maintenance. Verify part compatibility with your VIN or vehicle fit guide before purchase to ensure the correct application.