Motorad 501-189 Engine Coolant Thermostat Housing Assembly

Integrated Housing Thermostat for OE-Style Cooling Control

Motorad 501-189 is an engine coolant thermostat housing assembly built for vehicles that require a 189°F opening temperature and an integrated housing design. It combines the thermostat, housing, and seal in one OE-style service part for direct replacement on select Dodge Sprinter and Mercedes-Benz applications.

Key Features

• Integrated housing thermostat assembly for simplified cooling system service
• 189°F start-to-open temperature for OE-specified thermal control
• Aluminum, stainless steel, and copper construction
• Rubber seal included for proper sealing at the housing interface
• 3-bolt housing design with 2 outlet ports
• Offset design with air relief valve where applicable
• Manufactured to OEM specifications and processes

Product Details

Motorad’s Integrated Housing Thermostat line focuses on OE-style replacement parts that match factory cooling system requirements. Part number 501-189 uses a copper case and wax compound for quick response to coolant temperature changes, helping maintain stable engine operating temperature in demanding service conditions. This part cross-references Dorman - OE Solutions 902-5147 for the same application.

Compatible With 2003-2006 Dodge Sprinter 2500, N/A; 2003-2006 Dodge Sprinter 3500, N/A; 2004-2006 Mercedes-Benz Sprinter, N/A; and 2005-2006 Mercedes-Benz E320, N/A. The Motorad 501-189 is also a direct-fit reference for shoppers searching for a Dodge Sprinter thermostat housing assembly or Mercedes-Benz E320 coolant thermostat housing at 189°F.

Common Cooling System Issues Addressed

• Engine running too cool or taking too long to reach operating temperature
• Coolant temperature instability during stop-and-go driving
• Leaking thermostat housing seal at the coolant outlet
• Cracked or worn OE housing requiring replacement
• Service needs on a thermostat housing assembly with factory-style fitment

Installation Notes

Verify the 189°F temperature specification and match the housing configuration before installation. Inspect the mating surfaces, clean coolant residue, and replace any damaged hoses or clamps during service. Follow the vehicle manufacturer’s coolant fill and bleed procedure to remove trapped air after installation.

Quality Assurance

Manufactured by an OE supplier using OEM-quality materials and safety standards, this thermostat housing assembly is built to meet factory specifications for the listed applications. Motorad 501-189 is intended for direct replacement service on the confirmed Dodge Sprinter and Mercedes-Benz fitments shown above.