Gates 34786 Engine Coolant Thermostat

Gates Integrated Housing Thermostat 34786

The Gates Integrated Housing Thermostat 34786 is an OE Exact engine coolant thermostat assembly built for accurate temperature regulation in vehicles using an integrated thermostat housing. It is specified at 190 degrees Fahrenheit / 88 degrees Celsius and includes a seal for the application. This part is a direct-fit cooling system service option for BMW X5 and BMW 335d models with the listed factory configuration.

Key Features

• Integrated housing thermostat design for modern cooling system layouts
• OE Exact comparison rating for factory-style fit and function
• 190 degree Fahrenheit opening temperature, also listed as 88 degrees Celsius
• 4 bolt holes for secure mounting
• Outlet outside diameters: 1.515 in and 1.338 in
• Seal included for the application
• Non-electric thermostat design
• No jiggle pin weep hole and no check valve

Detailed Product Overview

Gates Integrated Housing Thermostat 34786 is part of the Gates integrated housing thermostat line, a product family focused on replacement solutions for vehicles that use thermostat and housing assemblies as a single unit. Gates applies cooling-system research and development to this category to provide an aftermarket alternative that matches OE-style temperature control and installation requirements. This thermostat is listed for 2009-2013 BMW X5 and 2009-2011 BMW 335d applications, making it a relevant choice when searching for a BMW X5 thermostat housing assembly or a BMW 335d engine coolant thermostat replacement. This part cross-references Bosch 15309 for the same application.

Common Problems This Part Can Address

• Engine running too cool or too warm due to thermostat control issues
• Temperature fluctuation caused by a worn integrated housing assembly
• Cooling system service needs on BMW X5 and BMW 335d models
• Leak points associated with aging thermostat housing seals
• Delayed warm-up from a thermostat that no longer opens at the specified temperature

Installation Notes and Tips

Verify the outlet diameters, bolt-hole count, and temperature specification before installation to confirm the correct BMW thermostat housing replacement. Match the vehicle’s original integrated housing layout and inspect the mating surfaces carefully so the included seal can seat properly. After installation, refill and bleed the cooling system according to the vehicle service procedure to help maintain stable coolant flow and operating temperature. Confirm fitment for 2009-2013 BMW X5 and 2009-2011 BMW 335d before ordering the Gates 34786 thermostat assembly.

Quality Assurance

Gates positions this integrated thermostat housing line as an OE-style aftermarket solution for accurate temperature regulation and dependable cooling-system control. The OE Exact rating supports factory-matched application coverage for the listed BMW X5 and BMW 335d fitments.