Motorad 657-203 Engine Coolant Thermostat

OE-Style 203°F Thermostat for Chrysler, Dodge, and Jeep

Motorad Standard 657-203 is an engine coolant thermostat built for OE-spec cooling control in select Chrysler, Dodge, and Jeep applications. It uses OEM-quality materials, a copper case, and a wax compound for quick response to coolant temperature changes.

Fits 2007-2020 Dodge Journey, 2007-2012 Dodge Caliber, 2008-2014 Dodge Avenger, 2011-2014 Chrysler 200, 2008-2010 Chrysler Cirrus, 2007-2010 Chrysler Sebring, 2007-2015 Jeep Compass, and 2007-2017 Jeep Patriot, with application-specific notes listed below.

Key Features

• Motorad Standard line thermostat, part number 657-203
• 203°F start-to-open temperature for OE-specified thermal control
• Includes gasket/seal with rubber O-ring sealing design
• Jiggle pin weep hole for air relief during cooling system service
• Offset design and OEM-style seals where applicable
• Copper case and wax compound for responsive temperature regulation
• Sealing flange outside diameter: 1.72 in; height: 1.45 in

Product Details

This Motorad engine coolant thermostat is engineered to match OEM specifications and manufacturing processes for the listed vehicles. The Standard product line focuses on direct-fit cooling system service parts, and this 657-203 thermostat is built to maintain proper coolant flow at the specified 203°F opening point. It is a direct replacement for applications that call for a standard thermostat with seal, including secondary thermostat and water pass-through locations on select Chrysler, Dodge, and Jeep models.

This part cross-references Mopar 55111017AD and Bosch 15122 for the same application.

Common Cooling System Issues It Can Address

• Engine running cooler or hotter than the specified operating range
• Temperature fluctuation caused by a worn thermostat element
• Coolant flow control problems in secondary thermostat locations
• Air trapped in the cooling system after thermostat service
• Seal leakage at the thermostat housing interface

Installation Notes

• Verify the vehicle’s thermostat location and OE temperature specification before installation.
• Use the included seal during installation and inspect the mating surfaces for corrosion or debris.
• The jiggle pin weep hole helps with air relief; orient the thermostat according to the service procedure for the vehicle.
• Confirm fitment notes for secondary thermostat replacement, water pass-through, or bypass applications on Dodge Journey, Jeep Compass, Jeep Patriot, and related models.

Quality Assurance

Motorad manufactures this thermostat with OEM-quality materials and safety standards as an OE supplier. The copper case, wax compound, and OE-style construction are intended to meet the demands of modern cooling systems while following factory-style specifications.