SKP SK121296 Engine Coolant Thermostat Housing - Engine Block

Engine Coolant Thermostat Housing Overview

The SKP engine coolant thermostat housing, part number SK121296, is a direct-fit replacement for a wide range of BMW cooling system applications. It is built from PA66-GF30 plastic for strength and heat resistance in demanding engine bay conditions.

Key Features

• PA66-GF30 plastic construction for durability in cooling system service.
• Replacement thermostat housing for engine coolant flow control components.
• Fits multiple BMW 2 Series, 3 Series, 4 Series, 5 Series, X1, X3, X4, X5, and Z4 applications.
• SK121296 part number for easy identification and ordering.

Detailed Description

SK121296 is an engine coolant thermostat housing designed for BMW vehicles that use this housing style in the cooling system. The PA66-GF30 material helps the housing handle heat, coolant exposure, and long-term underhood use. This makes it a practical replacement when the original housing is cracked, warped, or no longer sealing correctly. This part cross-references BMW OE numbers 11 53 7 633 477 and 11 53 8 635 689 for the same application.

Compatible BMW applications include 2012-2014 BMW 320i, 2013-2018 BMW 320i xDrive, 2016-2018 BMW X4, 2016-2018 BMW X5, 2016-2017 BMW X3, 2014-2016 BMW 228i, 2015-2016 BMW 228i xDrive, 2012-2016 BMW 528i xDrive, and 2012-2016 BMW Z4. Additional coverage includes BMW 220i, 328i, 328i GT xDrive, 328i xDrive, 420i, 420i Gran Coupe, 428i, 428i Gran Coupe, 428i xDrive, 428i xDrive Gran Coupe, 520i, 528i, X1, and 325i applications listed in the fitment data. SK121296 is also listed for BMW 220i engine block fitment.

What It Helps Address

• Coolant leaks from a cracked or weakened thermostat housing.
• Improper sealing at the thermostat housing connection.
• Cooling system service needs on BMW engines with plastic housing assemblies.
• Replacement of a worn housing identified by part number SK121296.

Installation Notes and Tips

Verify the year, model, and fitment notes before ordering, especially for 2015 applications marked to 02/15. Confirm the original housing style and engine configuration against the vehicle listing. Inspect the mating surfaces, thermostat, and related seals during service so the replacement housing can seat correctly.

Quality Assurance

SKP supplies replacement cooling system components for direct-fit service applications. Part number SK121296 is built to match the listed BMW fitment coverage and material requirements for this housing type.