Gates 34939 Engine Coolant Thermostat

Integrated Thermostat Housing for Volkswagen Cooling Control

Gates 34939 is an OE Exact integrated housing thermostat built to regulate engine coolant temperature with the housing and thermostat combined in one assembly. It is a direct-fit cooling system service part for select 2015 Volkswagen Golf and Golf SportWagen applications, helping maintain stable operating temperature in everyday driving.

The Gates Integrated Housing Thermostat line focuses on accurate temperature control for vehicles that use integrated thermostat housings. For Volkswagen Golf and Volkswagen Golf SportWagen owners, this part number 34939 provides a replacement solution that matches the original-style integrated design.

Key Features

• Integrated Housing Thermostat design
• OE Exact grade type for original-style fit and function
• Start-to-open temperature: 197 degrees F / 92 degrees C
• Non-electric thermostat design
• Four bolt hole mounting pattern
• Outlet dimensions listed by the manufacturer for housing fitment reference

Detailed Product Overview

Gates part number 34939 is an engine coolant thermostat assembly for vehicles that use an integrated thermostat housing. By combining the thermostat and housing into one service component, it supports precise coolant flow control as the engine reaches operating temperature. This helps the cooling system maintain the temperature range specified for the vehicle platform. This part cross-references Volkswagen OE number 04L121026Q for the same application.

Compatible With 2015 Volkswagen Golf, N/A, and 2015 Volkswagen Golf SportWagen, N/A. These applications call for a 197 degree OE-temperature integrated housing thermostat with seal included, making Gates 34939 a relevant replacement for Volkswagen Golf cooling system service and Volkswagen Golf SportWagen thermostat housing replacement needs.

What It Helps Address

• Engine running too cool or too warm
• Delayed warm-up after cold starts
• Temperature fluctuation from a worn thermostat assembly
• Coolant flow control issues in integrated housing systems
• Cooling system service on 2015 Volkswagen Golf and Golf SportWagen

Installation Notes and Tips

Verify the original thermostat housing style, outlet dimensions, bolt hole count, and OE temperature specification before installation. Inspect the mating surfaces and cooling system condition during service, and follow the vehicle manufacturer’s coolant fill and bleed procedure after replacement. Because this is an integrated housing thermostat, confirm that the replacement matches the original housing configuration for the 2015 Volkswagen Golf or Golf SportWagen application.

Quality Assurance

Gates develops aftermarket thermostat solutions for vehicles equipped with integrated thermostat housings, with a focus on accurate temperature regulation and OE-style replacement fitment. Part number 34939 is built as an OE Exact cooling system service component for the listed Volkswagen applications.