Motorad 6129KT Engine Coolant Thermostat Housing Assembly - Upper

Motorad 6129KT Thermostat Housing Assembly

Motorad 6129KT is an engine coolant thermostat housing assembly built for standard replacement service in demanding cooling systems. It uses OEM-quality materials and OE-supplier manufacturing processes to deliver consistent coolant control for select Mazda applications, including Mazda 3, Mazda 3 Sport, Mazda 6, and CX-5.

Key Features

• Engine coolant thermostat housing assembly for cooling system service
• OE-supplier construction with OEM-quality materials and safety standards
• Copper case and wax compound for quick response to coolant temperature changes
• Offset design with air relief valve and OEM-style seals where applicable
• Mechanical actuator with disk valve type
• Black and silver housing with stainless steel, copper, and plastic construction
• Fits Mazda 3, Mazda 3 Sport, Mazda 6, and CX-5 applications listed below

Detailed Description

The Motorad Kit 6129KT thermostat housing assembly is engineered as a standard replacement part for cooling system repair and maintenance. Its copper case and wax compound are used to react quickly to coolant temperature changes, while the offset design and air relief valve support proper system operation. This part cross-references Motorad (e.g., 6129KT) for the same application. It is a direct service option for 2012-2016 Mazda 3, 2017 Mazda 3 Upper, 2014-2016 Mazda 3 Sport, 2018 Mazda 3 Sport, 2014-2018 Mazda 6, and 2013-2016 Mazda CX-5.

What It Helps Address

• Coolant temperature regulation issues caused by a worn thermostat housing
• Leaks at the housing interface when the original seal surface is compromised
• Delayed thermostat response from aging internal components
• Air trapped in the cooling system after thermostat service
• Fitment problems when replacing an OE-style housing on Mazda cooling systems

Installation Notes

Gasket or seal is required and is not included. Mounting hardware is not included. Verify the mounting hole pattern, flange dimensions, and start-to-open temperature before installation. Clean the mating surfaces thoroughly and inspect the cooling system for contamination or damage before reassembly. Confirm the correct application for your Mazda 3, Mazda 3 Sport, Mazda 6, or CX-5 by year and position before ordering.

Quality Assurance

Motorad manufactures this thermostat housing assembly with OEM specifications and processes, using materials selected for cooling-system service and OE-supplier standards. The design includes OEM-style sealing features where applicable to support proper fit and function in the listed Mazda applications.