Rein CTA0028 Engine Coolant Thermostat Housing Assembly

OE Quality Thermostat Housing Assembly

Rein CTA0028 is an OE-quality engine coolant thermostat housing assembly built for direct replacement service on select BMW and Rolls-Royce cooling systems. It is engineered to match original equipment design specifications, with a thermostat calibrated to 105 degrees Celsius for stable operating temperature control.

Compatible with BMW M5, X5, X6, X7, XM, M3, M4, M8, 760i xDrive, and Rolls-Royce Ghost, Phantom, and Cullinan applications, this thermostat housing assembly is made to support accurate coolant flow and straightforward installation. Rein CTA0028 is also a direct-fit option for BMW and Rolls-Royce owners looking for an OE-style replacement.

Key Features

• Matches original equipment design specifications
• Direct fitment for easier installation
• Built to strict engineering standards for materials and tolerances
• Thermostat calibrated to 105 degrees Celsius
• OE-quality housing construction in metal or plastic, based on vehicle requirements
• Rein CTA0028 replacement part for select BMW and Rolls-Royce cooling systems

Detailed Description

Rein Automotive thermostat assemblies are manufactured as direct replacements for OE units, using molds cast from OEM parts to help maintain factory-style dimensions and fit. The housing design follows vehicle-specific requirements, and the assembly uses high-quality components selected for durability and service life. For technicians and owners servicing BMW cooling system repairs, CTA0028 provides a precise replacement for the original thermostat housing assembly.

This part cross-references BMW OE numbers 11530304425 and 11537502779 for the same application.

What It Helps Address

• Engine running too cool or too hot due to thermostat control issues
• Coolant temperature instability during normal driving
• Leaks or sealing concerns at the thermostat housing
• Fitment problems caused by worn or incorrect replacement housings
• Cooling system service needs on BMW and Rolls-Royce vehicles

Installation Notes and Tips

Verify the part number and vehicle application before installation. This thermostat housing assembly is application-specific and does not include installation instructions or hardware. Because cooling system components are sensitive to fit and sealing, inspect related hoses, seals, and coolant condition during service.

Quality Assurance

Rein CTA0028 is manufactured to OE-style material and tolerance standards for consistent fit and performance. The assembly is produced in Germany and built to meet the factory requirements expected for BMW and Rolls-Royce cooling system repair.

Fits 2023-2026 BMW 760i xDrive, N/A. Fits 2023-2026 BMW M2, N/A. Fits 2019-2021 BMW M2, N/A. Fits 2021-2026 BMW M3, N/A. Fits 2015-2018 BMW M3, N/A. Fits 2015-2026 BMW M4, N/A. Fits 2025-2026 BMW M5, N/A. Fits 2018-2023 BMW M5, N/A. Fits 2012-2016 BMW M5, N/A. Fits 2025-2026 BMW M5 Touring, N/A. Fits 2020-2026 BMW X5, N/A. Fits 2004-2018 BMW X5, N/A. Fits 2008-2026 BMW X6, N/A. Fits 2023-2026 BMW X7, N/A. Fits 2023-2026 BMW XM, N/A. Fits 2019-2026 Rolls-Royce Cullinan, N/A. Fits 2023-2025 BMW Alpina XB7, N/A. Fits 2022-2025 BMW M8, N/A. Fits 2020 BMW M8, N/A. Fits 2020-2025 BMW M8 Gran Coupe, N/A. Fits 2020-2025 BMW X4, N/A. Fits 2010-2025 Rolls-Royce Ghost, N/A. Fits 2004-2025 Rolls-Royce Phantom, N/A. Fits 2020-2024 BMW X3, N/A. Fits 2017-2022 BMW M760i xDrive, N/A. Fits 2017-2022 BMW M760Li xDrive, N/A. Fits 2017-2021 Rolls-Royce Dawn, N/A. Fits 2014-2021 Rolls-Royce Wraith, N/A. Fits 2013-2019 BMW 650i Gran Coupe, N/A. Fits 2013-2019 BMW 650i xDrive Gran Coupe, N/A. Fits 2014-2019 BMW M6 Gran Coupe, N/A. Fits 2012-2018 BMW 650i, N/A. Fits 2006-2010 BMW 650i, N/A. Fits 2012-2018 BMW 650i xDrive, N/A. Fits 2012-2018 BMW M6, N/A. Fits 2010-2017 BMW 550i GT xDrive, N/A. Fits 2006-2016 BMW 550i, N/A. Fits 2011-2016 BMW 550i xDrive, N/A. Fits 2010-2015 BMW 550i GT, N/A. Fits 2006-2015 BMW 750i, N/A. Fits 2010-2015 BMW 750i xDrive, N/A. Fits 2006-2015 BMW 750Li, N/A. Fits 2010-2015 BMW 750Li xDrive, N/A. Fits 2010-2015 BMW 760Li, N/A. Fits 2003-2008 BMW 760Li, N/A. Fits 2004-2006 BMW 760i, N/A. Fits 2004-2005 BMW 545i, N/A. Fits 2004-2005 BMW 645Ci, N/A. Fits 2002-2005 BMW 745i, N/A. Fits 2002-2005 BMW 745Li, N/A.