Gates 34766 Engine Coolant Thermostat

OE Exact Thermostat for Hyundai, Kia, and Toyota

Gates OE Exact Thermostat 34766 is built for drivers who want an OEM-style coolant thermostat replacement with the same fit, function, and design as the original part. It is a direct choice for cooling system service on select Hyundai Genesis Coupe, Sonata, Santa Fe, Veracruz, Azera, Entourage, and Kia Sorento, Sedona, Borrego, Amanti, plus Toyota Hilux applications.

Key Features

• OE Exact Thermostat design for factory-style replacement fit and operation
• Bottom by-pass design for the listed cooling system applications
• Steel and copper construction for thermostat durability
• 180 degree start-to-open temperature on most listed applications
• Jiggle pin weep hole included for air bleeding during service
• O-ring seal type with seal included
• Gates part number 34766 for easy identification

Product Details

This Gates OE Exact Thermostat 34766 is engineered to match OEM product fit, function, and design, making it a practical replacement for temperature control in the engine cooling system. It is listed for 2006-2015 Hyundai and Kia platforms, including 2006-2010 Hyundai Sonata, 2007-2012 Hyundai Santa Fe, 2007-2012 Hyundai Veracruz, 2011-2013 Kia Sorento, and 2007-2009 Kia Amanti. It also covers Toyota Hilux applications for 2018-2020 model years, with OE temperature notes varying by year.

This thermostat helps regulate coolant flow so the engine reaches and maintains the correct operating temperature. The OE Exact Thermostat line is Gates’ factory-style replacement range for buyers who want a direct-fit cooling system component rather than a universal part. This part cross-references Hyundai/Kia OE numbers 255003C100 and 255003C130 for the same application.

What It Helps Address

• Engine running too cool or too hot due to thermostat wear
• Delayed warm-up after cold starts
• Temperature fluctuation from a sticking thermostat
• Cooling system service on OE-style Hyundai, Kia, and Toyota applications
• Replacement of a thermostat with a worn seal or bypass function

Installation Notes and Tips

Verify the engine application, OE temperature rating, and bypass design before installation. The thermostat uses an O-ring seal and includes a jiggle pin weep hole, so correct orientation matters during assembly. Clean the housing sealing surfaces thoroughly and inspect the cooling system for contamination, leaks, or trapped air before refilling.

Quality Assurance

Gates designs this thermostat as an OE Exact replacement, with fit, function, and design aligned to the original equipment part. The steel and copper construction, OE-style sealing, and application-specific temperature calibration support consistent cooling system service on the listed vehicles.