Dorman 902-5128 Engine Coolant Thermostat Housing

Engine Coolant Thermostat Housing

Dorman 902-5128 is a replacement engine coolant thermostat housing built to match the fit and durability of the original housing on specified vehicles. It is made from black plastic and includes a gasket or seal for a direct replacement on select Hyundai and Kia applications.

Compatible With 2010-2015 Hyundai Tucson, 2010-2012 Hyundai Santa Fe, 2011-2014 Hyundai Sonata, 2013-2015 Hyundai Santa Fe Sport, 2011-2015 Kia Optima, 2011-2015 Kia Sportage, and 2011-2014 Kia Sorento. This part cross-references Gates CO34874 for the same application.

Key Features

• Replacement engine coolant thermostat housing for specified Hyundai and Kia vehicles
• Black plastic construction for OE-style fit and function
• Includes gasket or seal
• Outlet port diameter: 2.4
• Inlet port diameter: 1.23
• Flange thickness: 0.41
• Mounting hole quantity: 5 and 6
• Designed to handle repeated temperature swings in the cooling system

Detailed Description

Dorman 902-5128 thermostat housing is engineered as a direct replacement for the stock housing used on select Hyundai Tucson, Santa Fe, Santa Fe Sport, Sonata, and Kia Optima, Sportage, and Sorento models. The housing is built from plastic and shaped to match the original mounting and port layout, helping maintain proper coolant routing at the thermostat location. Dorman 902-5128 is a practical choice when the original housing is cracked, warped, or leaking at the seal surface.

What It Helps Fix

• Coolant leaks at the thermostat housing
• Cracked or heat-damaged plastic housing
• Warped sealing surfaces that cause seepage
• Improper coolant flow caused by a damaged housing outlet or inlet
• Cooling system service issues on Hyundai Tucson, Sonata, and Kia Sportage applications

Installation Notes

Verify the housing shape, port sizes, and mounting-hole layout against the original part before installation. Transfer any required thermostat or related components from the vehicle if they are not included with the replacement housing. Clean the mating surfaces thoroughly and replace the seal during installation to help prevent leaks. Bleeder valve, bolts, O-rings, and thermostat are not included.

Quality Assurance

This Dorman replacement housing is built to match stock fit and durability expectations for the listed applications and is engineered to withstand extreme temperature changes for extended service life.