Dorman 902-5249 Engine Coolant Thermostat Housing Assembly

Engine Coolant Thermostat Housing Assembly

Dorman 902-5249 is a replacement engine coolant thermostat housing assembly built for specified Nissan and INFINITI applications. It matches the stock housing assembly’s fit and durability requirements while using aluminum and steel construction to handle repeated temperature swings in the cooling system.

Key Features

• Engine coolant thermostat housing assembly with integrated cover
• Aluminum and steel construction with a natural finish
• Includes gasket and thermostat for a complete cooling-system service
• 180 degree F thermostat opening temperature
• Three mounting holes and two outlet ports
• Designed for Nissan Frontier thermostat housing replacement and related VQ-series applications
• Part number 902-5249 for direct catalog lookup

Detailed Description

This Dorman thermostat housing assembly is engineered for vehicles that use an integrated thermostat housing cover, including Nissan Frontier, Nissan Xterra, Nissan Pathfinder, Nissan NV1500, Nissan NV2500, Nissan NV3500, and select INFINITI models. The housing is built to match the original fitment profile, with a 1.986-inch inside diameter, 4.143-inch flange length, 2.74-inch flange width, and 0.665-inch flange thickness. The included thermostat opens at 180 degrees F, helping maintain proper engine operating temperature in the cooling system.

For buyers searching for a 2005-2020 Nissan Frontier thermostat housing assembly, a 2005-2015 Nissan Xterra coolant thermostat housing, or a 2005-2012 Nissan Pathfinder thermostat housing replacement, this part number 902-5249 provides a direct-fit service solution. This part cross-references Motorad 391-180 and 2120031U13 for the same application.

Common Problems This Part Can Address

• Cracked or warped thermostat housing
• Coolant leaks at the housing or gasket surface
• Sticking thermostat that affects engine temperature control
• Corrosion or heat-related housing wear
• Cooling-system service on Nissan and INFINITI vehicles with integrated thermostat housings

Installation Notes and Tips

Verify the mounting hole pattern, outlet port layout, and thermostat opening temperature before installation. Replace the gasket during service and clean the mating surfaces thoroughly to help achieve a proper seal. Because mounting hardware is not included, reuse or source the correct fasteners as needed for the vehicle application. Confirm vehicle-specific fitment for 2012-2021 Nissan NV1500, NV2500, and NV3500; 2005-2020 Nissan Frontier; 2005-2015 Nissan Xterra; 2005-2012 Nissan Pathfinder; 2006-2008 INFINITI M35; 2004-2006 INFINITI G35; and 2004 INFINITI FX35.

Quality Assurance

Dorman designs replacement cooling-system components to match stock housing fit and durability requirements and to withstand extreme temperature changes for extended service life.