Motorad 204-180 Engine Coolant Thermostat

Engine Coolant Thermostat Overview

The Motorad Standard 204-180 engine coolant thermostat is a 180°F replacement thermostat built to OE specifications for consistent coolant temperature control. It uses a copper case and wax compound for quick reaction to coolant temperature changes, helping maintain stable engine operating temperature in a wide range of applications.

Compatible With Mazda 3, CX-30, CX-50, CX-9, CX-5, 6, MX-5 Miata, and select Chrysler, Dodge, Plymouth, Chevrolet, and Pontiac models, this thermostat is a direct-fit option for many 180°F applications. The Motorad 204-180 is also cross-referenced with Hayden 153 for the same application.

Key Features

• 180°F thermostat temperature rating for OE-style engine cooling control
• Manufactured with OEM-quality materials and processes
• Copper case and wax compound for rapid response to coolant temperature changes
• Offset design included where applicable
• Air relief valve included where applicable
• OEM-style seals included where applicable
• Sealing flange outside diameter: 1.81 in
• Flange thickness: 0.05 in
• Motorad Standard line replacement thermostat

Detailed Description

Motorad Standard 204-180 is an engine coolant thermostat engineered for vehicles that require a 180°F opening temperature. Built to OE supplier standards, it follows OEM specifications and manufacturing processes to support accurate coolant flow regulation in demanding cooling systems. The copper case and wax compound are used to deliver responsive temperature control, while the offset design and air relief valve help support proper installation and system operation where applicable.

This part is a practical replacement for drivers servicing Mazda cooling systems, including Mazda 3, CX-30, CX-50, CX-9, CX-5, 6, and MX-5 Miata applications, as well as older Chrysler, Dodge, Plymouth, Chevrolet Chevette, and Pontiac Acadian/T1000 fitments listed below. Part number 204-180 is also listed under common interchange references such as Hayden 153.

What It Helps Address

• Engine running too cool or taking too long to reach operating temperature
• Temperature fluctuations caused by a worn thermostat
• Restricted coolant flow from a thermostat that no longer opens correctly
• Cooling system service on 180°F OE-style applications
• Replacement needs for Mazda and select legacy Chrysler, Dodge, Plymouth, Chevrolet, and Pontiac models

Installation Notes and Tips

Verify the thermostat temperature rating and flange dimensions before installation. This unit does not include a gasket or seal, and no installation tool is included. Inspect the thermostat housing, sealing surfaces, and coolant condition during service, and replace any worn seals or related cooling components as needed for a proper repair.

Fitment examples include Fits 2021-2023 Mazda 3, N/A; Fits 2022-2023 Mazda CX-30, N/A; Fits 2023 Mazda CX-50, N/A; Fits 2021-2023 Mazda CX-9, N/A; Fits 2022 Mazda CX-5, N/A; Fits 2021 Mazda 6, N/A; and Fits 2021 Mazda MX-5 Miata, N/A.

Quality Assurance

Motorad manufactures this thermostat with OEM-quality materials and safety standards as an OE supplier. The Standard line is built to meet OEM specifications for fit and temperature control consistency across the listed applications.