Gates 34834 Engine Coolant Thermostat

Integrated thermostat housing for BMW cooling control

Gates 34834 is an integrated housing thermostat built for precise engine coolant temperature regulation. It is an OE Exact replacement for select BMW applications, including BMW X1, X6, 135i, 135is, 335i, 335i xDrive, and X5 models with the 217-degree thermostat specification.

The Gates Integrated Housing Thermostat line focuses on accurate temperature control as more modern engines use integrated thermostat assemblies. Gates applies aftermarket thermostat development to provide a direct-fit alternative to OE dealership parts for the listed BMW fitments.

Key features

• Integrated Housing Thermostat design for coolant temperature regulation
• OE Exact comparison rating for direct replacement fitment
• Start to open temperature: 103°C / 217°F
• Jiggle pin weep hole: Yes
• Jiggle pin/check valve: Yes
• Electric: No
• Number of bolt holes: 0
• Outlet inside diameters: 1.296 in, 1.295 in, .794 in, .669 in
• Outlet outside diameters: 1.509 in, 1.541 in, 1.027 in, .875 in

Detailed description

Gates 34834 is an engine coolant thermostat assembly engineered for BMW cooling systems that use an integrated thermostat housing. It is listed as OE Exact and matches the 217-degree OE temperature specification for applications such as 2011-2013 BMW 335i, 2011-2013 BMW 335i xDrive, 2011-2013 BMW 135i, 2013 BMW 135is, 2011-2014 BMW X6, 2013-2015 BMW X1, and 2011-2013 BMW X5. This part number, 34834, is built around the housing-style thermostat format used on these vehicles to maintain stable coolant flow and operating temperature.

This part cross-references Dorman - OE Solutions 902-5155 for the same application.

What it helps address

• Engine running too cool or too hot
• Temperature fluctuation during normal driving
• Cooling system fault codes related to thermostat performance
• Delayed warm-up after cold starts
• Loss of temperature control in integrated thermostat housing systems

Installation notes and tips

Verify the OE temperature specification and housing style before installation. Confirm outlet diameters and the no-bolt-hole configuration against the removed part to ensure proper fitment. Because this is an integrated housing thermostat, inspect the surrounding cooling system components, hoses, and seals for wear before reassembly. For BMW X1, X6, 135i, 135is, 335i, 335i xDrive, and X5 applications, match the vehicle by year and engine cooling layout rather than by appearance alone.

Quality assurance

Gates develops aftermarket thermostat solutions for integrated housing applications to provide an OE-style replacement option for modern cooling systems. Part number 34834 is specified as OE Exact for the listed BMW fitments.