Dorman 902-5167 Engine Coolant Thermostat Housing Assembly

Engine Coolant Thermostat Housing for Audi

Dorman 902-5167 is an engine coolant thermostat housing assembly built to match the fit and durability of the original housing on specified vehicles. It is a metal replacement housing designed for temperature cycling and includes the thermostat and O-ring needed for the assembly.

Compatible with select 2002-2006 Audi A6 and A6 Quattro models, as well as 2002-2005 Audi A4 and A4 Quattro models, this thermostat housing assembly supports proper coolant flow control and helps maintain stable engine operating temperature. The 198-degree thermostat specification makes it a direct-fit service part for the listed applications.

Key Features

• Metal thermostat housing construction with a natural finish
• Engine coolant thermostat housing assembly with integrated cover design
• Includes thermostat and O-ring for the listed application
• 198-degree thermostat opening temperature
• Two mounting holes and one outlet port
• Designed for select Audi A4, A4 Quattro, A6, and A6 Quattro applications

Detailed Description

Dorman 902-5167 is engineered as a replacement engine coolant thermostat housing assembly for specific Audi vehicles. The metal housing is shaped to match the stock unit’s fit and mounting layout, with flange dimensions and bolt-hole spacing that support proper alignment during service. This part cross-references OE number 06C121111C and Motorad 466-198 for the same application. If you are replacing a worn thermostat housing on a 2002-2006 Audi A6 or A6 Quattro, or a 2002-2005 Audi A4 or A4 Quattro, this assembly provides the housing, thermostat, and O-ring in one service-ready configuration.

What It Helps Address

• Coolant leaks at the thermostat housing
• Cracked or warped original housing surfaces
• Thermostat sticking open or closed
• Unstable engine temperature readings
• Service issues caused by aging coolant system components

Installation Notes and Tips

Before installation, verify the vehicle application and compare the housing shape, bolt-hole spacing, and outlet configuration to the removed part. Clean the mating surfaces thoroughly and inspect the cooling system for contamination or damaged hoses before reassembly. Because mounting hardware is not included, reuse or source the correct fasteners as needed for the listed vehicle.

Quality Assurance

Dorman designs this replacement housing to match stock fit and durability requirements and to withstand repeated temperature changes in normal cooling-system service.