SKP SK121259 Engine Coolant Thermostat Housing

Aluminum thermostat housing for Ford and Mercury applications

SKP SK121259 is an engine coolant thermostat housing made from metal aluminum for select Ford and Mercury vehicles. It is built for applications that use a cover, a metal housing, and one sensor, including Ford Explorer, Ford Explorer Sport Trac, and Mercury Mountaineer models.

Key features

• Metal - Aluminum construction for the thermostat housing assembly
• Fits applications with cover and one sensor
• Direct replacement style for select cooling system repairs
• Cross-references OE part numbers 2L2E9K478BA and 2L5E9K478BA for the same application
• Part number SK121259 for easy ordering and catalog lookup

Fitment details

• Fits 2002-2010 Ford Explorer, N/A, w/ Cover; Metal Housing; Aluminum; w/ One Sensor
• Fits 2007-2010 Ford Explorer Sport Trac, N/A, w/ Cover; Metal Housing; Aluminum; w/ One Sensor
• Fits 2002-2010 Mercury Mountaineer, N/A, w/ Cover; Metal Housing; Aluminum; w/ One Sensor

What this part helps address

• Coolant leaks at a damaged thermostat housing
• Cracked or corroded housing on aluminum cooling system components
• Temperature control issues tied to a failing housing assembly
• Sensor-related service needs when the housing uses one sensor

Installation notes and tips

Verify the vehicle uses a cover, metal housing, aluminum construction, and one sensor before ordering. Match the original OE number or compare the existing housing layout to confirm fitment for your Ford Explorer, Explorer Sport Trac, or Mercury Mountaineer. SK121259 should be installed with the cooling system properly drained and refilled according to factory service procedures.

Quality assurance

SKP supplies replacement cooling system components for direct-fit service applications. This thermostat housing is identified for OE cross-reference use with 2L2E9K478BA and 2L5E9K478BA, helping confirm application match during parts selection.