Motorad 891-203 Engine Water Pump and Thermostat Assembly

Integrated Housing Thermostat Assembly

Motorad 891-203 is an integrated housing thermostat assembly for select Audi and Volkswagen applications. It combines the thermostat, housing, sensor, water pump, and seal in one OE-specified cooling system service part for 203°F operation.

Key Features

• Integrated housing thermostat design for streamlined cooling system service
• 203°F opening temperature for OE-specified thermal control
• Plastic housing with black finish
• Rubber gasket/seal included for proper sealing
• Five bolt holes and three outlet ports
• OE supplier manufacturing with OEM quality materials and processes
• Copper case and wax compound for fast coolant temperature response

Product Details

This Motorad Integrated Housing Thermostat line is built for demanding automotive cooling systems and follows OEM specifications and manufacturing processes. The Motorad 891-203 is a direct-fit style engine water pump and thermostat assembly for vehicles such as the Audi A4, Audi A5 Quattro, Audi Q5, Audi TT Quattro, and Volkswagen GTI, with fitment across multiple 2008-2018 model years. This part cross-references Dayco 89120 for the same application.

Common Cooling System Issues It Can Address

• Coolant temperature that stays too low or runs above the specified range
• Thermostat housing leaks caused by worn seals or aging plastic components
• Slow thermostat response during warm-up and temperature changes
• Cooling system service needs where the housing and thermostat are replaced together
• Fitment concerns on OE-specified integrated thermostat assemblies

Installation Notes

Verify engine code, build date, and OE reference before installation, especially on 2013 Audi A4 and A4 Quattro applications with date-specific coverage. Replace the included rubber seal during service and confirm all outlet connections and bolt-hole alignment before filling and bleeding the cooling system.

Quality Assurance

Manufactured by an OE supplier using OEM-quality materials and safety standards, this assembly is produced to OEM specifications for consistent cooling-system performance.