Gates CO35012 Engine Coolant Thermostat Housing

OE-Style Thermostat Housing for Hyundai and Kia

Gates Coolant Outlet CO35012 is an engine coolant thermostat housing built for direct replacement service on select Hyundai and Kia applications. It is made from plastic and follows OE exact specifications for fit and function, helping restore proper coolant routing at the thermostat outlet.

The Gates Coolant Outlet line focuses on practical replacement parts that address common aftermarket fit and material concerns while maintaining original-style operation. CO35012 is part of that line and is engineered for long service life in everyday cooling system use.

Key Features

• Engine coolant thermostat housing / coolant outlet
• Plastic construction
• OE exact replacement design
• Direct-fit style for original coolant outlet locations
• Two-bolt housing design
• Multiple outlet diameters for application-specific routing
• Cross-reference: Hyundai/Kia 256202GTA0

Detailed Description

Gates CO35012 is a thermostat housing assembly designed for cooling system service on 2015-2016 Hyundai Sonata, 2018-2019 Hyundai Sonata, 2019 Hyundai Santa Fe, 2017 Hyundai Santa Fe Sport, 2016-2019 Kia Optima, and 2016-2018 Kia Sorento. This part number is built to match original equipment requirements, making it a practical choice when replacing a worn, cracked, or leaking coolant outlet on Hyundai Sonata, Hyundai Santa Fe, Kia Optima, or Kia Sorento models.

The housing uses plastic construction and OE exact dimensions to support proper coolant flow and secure mounting at the thermostat outlet. Gates CO35012 is intended for applications where the original coolant outlet assembly needs replacement with a direct-fit part that follows factory-style geometry and connection points.

What It Helps Address

• Coolant leaks at the thermostat housing or outlet
• Cracked or heat-aged plastic coolant outlet assemblies
• Improper sealing from a worn original housing
• Cooling system service on Hyundai Sonata and Kia Optima applications
• Replacement of an OE-style thermostat housing with the correct outlet layout

Installation Notes and Tips

Verify the vehicle year, make, model, and engine cooling outlet configuration before installation. Inspect the mating surfaces, hoses, and clamps for wear or contamination, and transfer only the components specified by the vehicle service procedure. Confirm that the outlet diameters and bolt-hole layout match the original housing before final assembly.

Quality Assurance

Gates designs its Coolant Outlet line to address common aftermarket design, manufacturing, and material issues while maintaining original-style fit and performance. CO35012 is an OE exact replacement thermostat housing intended to deliver dependable cooling system service on the listed Hyundai and Kia applications.