Motorad 938-189 Engine Coolant Thermostat Housing Assembly

Integrated Thermostat Housing for OE Cooling Control

Motorad 938-189 is an engine coolant thermostat housing assembly built for OE-style cooling system service. It combines the thermostat, housing, and seal in one integrated unit for select Audi Q7, Audi Q5, and Volkswagen Touareg applications with a 189°F opening temperature.

The Integrated Housing Thermostat line focuses on direct-fit cooling components that follow OEM specifications and processes. This Motorad thermostat housing uses a copper case and wax compound for quick response to coolant temperature changes, along with an offset design and OEM-style sealing where applicable.

Key Features

• Engine coolant thermostat housing assembly with integrated thermostat and housing
• 189°F start-to-open temperature for OE-specified cooling control
• Black housing with plastic, stainless steel, and copper construction
• Rubber gasket/seal included
• 3 bolt holes and 2 outlet ports
• Offset design with air relief valve
• OE supplier manufacturing standards and OEM-style seals where applicable

Detailed Description

Motorad 938-189 is engineered for vehicles that require a thermostat housing assembly with the thermostat and seal integrated into one service part. It is built to OE quality standards and uses materials selected for consistent coolant temperature regulation. The 189°F calibration supports factory cooling strategy on applications such as the Audi Q7, Volkswagen Touareg, and Audi Q5. This part number, 938-189, is a direct replacement option for cooling system maintenance where the original housing assembly has worn, cracked, or begun to regulate temperature inconsistently.

This part cross-references Dorman - OE Solutions 938-189 for the same application.

What It Helps Address

• Coolant temperature that stays too low or rises above normal operating range
• Thermostat housing leaks at the seal or housing interface
• Cracked or aging plastic housing components
• Delayed thermostat response during warm-up
• Cooling system service needs on 2008-2013 Audi Q7, 2009-2013 Volkswagen Touareg, and 2011 Audi Q5

Installation Notes and Tips

Verify engine code and OE temperature specification before installation. Inspect the mating surfaces, coolant hoses, and clamps for wear before reassembly. Replace coolant as required by the vehicle service procedure and confirm there are no trapped air pockets after installation. The integrated housing design and seal help simplify service on the correct application, but the part should be matched to the exact vehicle configuration.

Quality Assurance

Motorad manufactures this thermostat housing assembly using OEM specifications and processes, with materials selected to meet OE supplier standards. The copper case and wax compound are used to promote fast reaction to coolant temperature changes, supporting stable engine cooling performance on the specified applications.