Motorad 303-180 Engine Coolant Thermostat

Motorad 303-180 Thermostat Overview

The Motorad 303-180 is a standard engine coolant thermostat built for OE-style temperature control in the cooling system. It opens at 180°F and includes an O-ring seal, making it a direct-fit service part for select Mazda applications, including Mazda 929 and Mazda MPV models.

Motorad Standard parts focus on OEM specifications and materials, with a copper case and wax compound that respond quickly to coolant temperature changes. This Motorad 303-180 thermostat is built to support stable engine operating temperature in demanding cooling systems.

Key Features

• 180°F start-to-open temperature for standard cooling system operation
• OE supplier manufacturing with OEM quality materials and processes
• Copper case and wax compound for responsive temperature control
• Offset design with air relief valve where applicable
• Includes an O-ring seal and OEM-style seals where applicable
• Standard thermostat design for select Mazda cooling system service

Detailed Product Description

The Motorad 303-180 engine coolant thermostat is engineered for precise coolant flow regulation as engine temperature rises. Its 180-degree opening point helps maintain the intended operating range, while the copper case and wax element are selected for consistent reaction to coolant temperature changes. The sealing flange dimensions, bypass sizing, and OEM-style sealing approach support proper fitment in the specified applications. This part cross-references Bosch 15168 and Carlson 14168 for the same application.

Compatible with 1988-1995 Mazda 929 and 1989-1995 Mazda MPV, this thermostat is a practical replacement for routine cooling system service. The Motorad 303-180 part number is also useful when searching for an OE-style 180F thermostat with seal for these Mazda models.

Common Cooling System Issues It Can Address

• Engine running cooler or warmer than the intended operating range
• Delayed coolant circulation after cold start
• Temperature fluctuation during normal driving
• Thermostat sticking from age, corrosion, or wear
• Cooling system service needs on Mazda 929 and Mazda MPV models

Installation Notes and Tips

Verify the thermostat orientation, seal placement, and housing condition before installation. Clean the mating surfaces thoroughly and replace any damaged gasket or seal surfaces to help prevent leaks. Confirm the 180°F specification and application match before installing the Motorad 303-180 in your Mazda 929 or Mazda MPV cooling system.

Quality Assurance

Motorad Standard parts are manufactured to OEM specifications and processes by an OE supplier, using materials selected for cooling system service. The Motorad 303-180 is built to meet OEM quality and safety standards for the listed applications.