Motorad 806-189 Engine Coolant Thermostat Housing Assembly

Integrated Housing Thermostat Overview

Motorad 806-189 is an integrated housing thermostat assembly built for precise coolant temperature control in select Volkswagen and Audi applications. It combines the thermostat, housing, and seal in one OE-style service part for a direct replacement on vehicles that call for a 189°F opening temperature.

The Integrated Housing Thermostat line from Motorad focuses on OE-spec fit and function, using OEM-quality materials and manufacturing processes for cooling systems that demand consistent temperature regulation. This Motorad 806-189 assembly is designed for vehicles such as the Volkswagen Jetta, Volkswagen Golf, Volkswagen Beetle, Audi A3, and Volkswagen Bora.

Key Features

• Integrated engine coolant thermostat housing assembly
• 189°F start-to-open temperature for OE-specified applications
• Includes thermostat, housing, and rubber seal
• Black housing with plastic, stainless steel, and copper construction
• 2 bolt holes and 5 outlet ports
• Offset design with air relief valve where applicable
• Copper case and wax compound for responsive coolant temperature changes

Detailed Product Description

Motorad 806-189 is engineered as an OE-style engine coolant thermostat housing assembly for vehicles that require integrated thermostat service. The housing is molded for the application, and the thermostat uses a copper case and wax compound to react quickly to coolant temperature changes. OEM-style seals are included where applicable, helping support a proper seal at the cooling system interface.

This part cross-references Dorman OE Solutions 902-5907 for the same application. It is a direct-fit cooling system service part for Volkswagen Jetta, Volkswagen Golf, Volkswagen Beetle, Audi A3, and Volkswagen Bora models listed in the fitment data.

What It Helps Address

• Coolant temperature that stays too low or too high
• Thermostat housing leaks at the sealing surface
• Delayed engine warm-up after cold starts
• Cooling system service on integrated thermostat designs
• Temperature control issues in OE-specified 189°F applications

Installation Notes and Tips

Verify the OE thermostat opening temperature before installation and confirm the outlet port layout matches the original housing. Inspect the mating surfaces, replace any damaged coolant hoses or clamps during service, and refill the cooling system with the correct coolant mixture after installation. Bleeding air from the system is important on integrated housing thermostat repairs, especially when the original design uses an air relief feature.

Fits 2013-2015 Volkswagen Beetle, N/A. Fits 2011-2014 Volkswagen Golf, N/A. Fits 2009-2014 Volkswagen Jetta, N/A. Fits 2010-2012 Audi A3, N/A. Fits 2008-2009 Volkswagen Bora, N/A.

Quality Assurance

Manufactured by an OE supplier using OEM-quality materials and processes, this thermostat housing assembly is built to meet the demands of modern automotive cooling systems. The design follows OEM specifications for the listed applications and uses application-specific seals for proper service fit.